Widespread showers/ storms will bring the threat of severe weather and flash flooding from the Southern Plains eastward through the Middle Mississippi/Ohio Valleys Monday... Another Critical Risk of Fire Weather for the Southern High Plains Monday.Advancing storm system will bring increasing showers and storm chances to much of the eastern U.S. Tuesday, with another risk of severe weather in the Ohio/Tennessee Valleys and Mid-Atlantic.Unsettled weather in the West, with lower elevation rain and higherelevation snow, continues Sunday night but will taper off through the dayMonday. A storm system passing through the central and eastern U.S. will bring the threat of severe weather and flash flooding as well a risk of fire weather over the next couple of days. A deep, energetic upper-level trough over the West will begin to shift eastward over the Plains Sunday night into Monday. Increased height falls will help to deepen/organize an area of low pressure in the lee of the Rockies over the Central Plains, with increased flow helping to reinforce a quasi-stationary frontal boundary extending eastward through the Middle Mississippi/Ohio Valleys and a dryline extending southward through the Southern Plains, with a cold front approaching from the west through the Southern Rockies/High Plains. Showers and storms will first expand in coverage Sunday night along the quasi-stationary boundary through the Middle Mississippi Valley eastward into the Ohio Valley and Mid-Atlantic as moisture advecting northward from the gulf continues to pool along the boundary. Enough shear will be present that a few storms may produce some large hail from northern Missouri eastward through central Illinois/Indiana through Sunday evening, with a Slight Risk of Severe Weather (level 2/5) in place from the Storm Prediction Center. An isolated threat for flash flooding will exist here as well, extending eastward into the Upper Ohio Valley, as heavy rain may have the tendency to repeat over areas as storms run parallel to the boundary. Another day of return flow from the Gulf as well as the arrival of the upper-level trough from the west on Monday will bring a much broader area of showers and thunderstorms along the east-west boundary as well as southward along the dryline through the Central/Southern Plains. Some supercells are expected to develop along the boundary from southern Missouri west through southeastern Kansas and southward along the dryline into central Oklahoma by late afternoon/early evening in the presence of increasing buoyancy and upper-level shear. The Storm Prediction Center has issued an Enhanced Risk (level 3/5) of severe weather for the chance of very large hail as well as damaging winds and a few tornadoes. Some more isolated storms will be possible further south into northern Texas, with a Slight Risk in place. A Slight Risk also extends eastward through the Ohio Valley where some isolated daytime storms and the arrival of storms growing upscale upstream over the Middle Mississippi Valley/Plains will bring the threat of damaging winds, as well as large hail and a few tornadoes.  By evening, increasing storm coverage and the potential for upscale growth into an organized complex of storms, as well as the tendency for storms to move parallel to the frontal boundary, will lead to a higher chance of locally heavy rainfall totals and some scattered flash flooding, with a Slight Risk of Excessive Rainfall (level 2/4) in place. In addition to the threat of severe weather and flash flooding, very strong winds upwards of 40 to 50 mph, with gusts as high as 75 mph, combined with very dry conditions behind the dryline over portions of the Southern High Plains have prompted another Critical Risk of Fire Weather (level 2/3) .

2m

Apr 01

Unsettled weather continues across the West Sunday with some locally heavy rainfall and isolated flood risk for Southern California and Arizona... Risk for severe weather and flash flooding from the Middle Mississippi Valley southwestward into the Southern Plains on Monday. Showers and storms with some severe weather and flash flooding threat for portions of the Midwest/Ohio Valley Sunday into Monday. Unsettled weather will continue across the West as a deep upper-trough and accompanying surface frontal system push inland across the region. Widespread showers and storms will continue this evening in Southern California but should decrease in coverage/intensity as the cold front pushes eastward, reducing the influx of moisture. A Slight Risk of Excessive Rainfall (level 2/4) remains in effect for the LA Basin/eastern Transverse Ranges south through the Peninsular Ranges through Sunday morning where the additional rainfall may lead to some instances of flooding given the wet antecedent conditions from the prior days rainfall. Some more isolated instances may also continue into the day Sunday before the rain fully tapers off. Additional locally heavy rainfall with an isolated flood risk will stretch into the Lower Colorado River Valley through Sunday morning, and into portions of southern Arizona Sunday. Otherwise, lower elevation rain showers/thunderstorms and higher elevation mountain snow are expected more broadly across the Great Basin, Southwest, and Rockies Sunday. Locally heavy snow is forecast for some of the regional mountain ranges, particularly from the Sierra eastward through the Great Basin/Four Corners region into the central Rockies, with some Winter Storm Warnings/Winter Weather Advisories in place. Some snow may mix in at lower elevations in the Great Basin and into the Rockies as temperatures remain cooler following a cold front passage, though any accumulations should remain light. Precipiation chances should come down through the day Monday as the frontal system pushes eastward into the Plains. As the upper-trough shifts east, lee cyclogenesis will help to strengthen/consolidate an area of low pressure over the Central Plains along a wavy, quasi-stationary boundary extending eastward through the Middle-Mississippi Valley and into the Mid-Atlantic. This boundary will become the focus for areas of widespread showers and thunderstorms over the next couple of days. The Central/Southern Plains will remain mostly dry Sunday, with precipitation limited to a wintry mix to the north of the boundary over portions of the Northern Plains in the presence of moist, upslope flow. Some light to moderate snow accumulations are expected, particularly in vicinity of the Black Hills. Then, on Monday, the focus shifts southeastward to the frontal boundary through the Middle Mississippi Valley southwestward along a dry line and approaching cold front through the Southern Plains. Increasing moisture/buoyancy as well as strengthening deep and low-level shear will lead to the threat of numerous thunderstorms with the potential for severe weather. The Storm Prediction Center has outlined an Enhanced Risk (level 3/5) from central Missouri southwestward into eastern Oklahoma where an increasing potential for very large hail, damaging winds, and tornadoes exists. A broader Slight Risk extends southward into north Texas. In addition, the expectation for repeated storms with increasing coverage as flow runs parallel to the approaching cold front has prompted an overlapping Slight Risk of Excessive Rainfall from central Missouri southwestward into northeastern Oklahoma. 

3m

Mar 31

Heavy rains, isolated flash flooding for portions of central to southern California, while heavy snows likely in the Sierra. Record low maximum temperatures possible across Southern California and the Southwest this weekend. Heavy snows possible Friday night into early Saturday across northern Maine. Wintry weather to spread eastward this weekend from the Northern Rockies into the Northern Plains. Much above average temperatures for the Easter weekend from the Central to Southern Plains, east across the Mid to Lower Mississippi Valley, Ohio Valley and into the Southeast... A cold and wet weather pattern on tap for the Easter weekend across much of California into the Southwest.  An area of low pressure currently off the northern California coast will be sinking slowly southeastward along the central to southern California coast over the next two days.  This low will produce the potential for widespread heavy rains along the central to southern California coastal regions, along with the potential for isolated flash flooding.  Flood watches are currently in effect across portions of coastal southern California from north and east of San Diego, northward through the LA metro region, including the Transverse range.  While heavy rains occur along the coastal areas of central to southern California, heavy snows are likely through much of the Sierra where 1 to 2 feet are possible.  Locally heavy snows will also be likely farther inland from the Mogollon Rim of Arizona, into the Wasatch of Utah, the Rockies of Wyoming and across the higher terrain of the Nevada Great Basin as this system pushes eastward this weekend.  In addition to the wet weather across southern California, high temperatures are expected to be much below average both Saturday and Sunday, with the potential for record low maximum temperatures across the Los Angeles to San Diego metro areas.  Much below average temperatures also expected across much of the Great Basin, Southwest and Northern Plains this weekend. Warmer more spring like temperatures are on tap from the Southern to Central Plains, eastward across the Middle to Lower Mississippi Valley, Ohio Valley and the Southeast.  Across these regions, high temperatures are expected to be 10 to 20 degrees above average. Winter weather will be hanging on across portions of northern Maine late Friday into early Saturday as a strong low moves slowly northward to the east of Maine across the Canadian maritimes.  Early Spring heavy snows are possible across northern Maine with accumulation in the 4 to 6 inch range forecast.  A fast moving area of low pressure moving west to east from Iowa into the L.P. of Michigan Friday night into Saturday will produce an area of 2-4" snows well to its north from the Arrowhead of Minnesota into the U.P. of Michigan. An expanding area of wintry weather is also expected to push eastward from the Northern Rockies Saturday and into the Northern Plains on Sunday.  The heaviest snow accumulations are expected over portions of the Northern Rockies with generally light totals pushing east into the High Plains.  

3m

Mar 30

Unsettled weather for the West, with a late season Atmospheric River impacting California into the weekend... Precipiation chances continue for New England Friday. Warming trend for portions of the central/eastern U.S. into the weekend. Higher elevation/mountain snow showers and lower elevation coastal/valley rain will continue across the West Thursday evening and into the day Friday as a frontal system moves through the region, eventually stalling, and underneath energetic upper-level flow aloft. Precipitation amounts, especially further inland, should remain mostly light to moderate except in the vicinity of the boundary across the Great Basin and into the central Rockies were some higher snow accumulations and more widespread lower elevation showers are expected. Then, along the West Coast, an amplifying upper-level trough/deepening closed low and the approach of a stronger Pacific system will help usher in a late season influx of higher moisture/Atmospheric River into central and southern California beginning by late Friday. The best overlap of moisture and onshore/upslope flow will initially be along the Transverse Ranges, where a Slight Risk of Excessive Rainfall (level 2/4) is in place through Saturday morning. A few inches of rainfall may lead to some flooding concerns, especially along terrain sensitive areas. The threat will continue into the day Saturday, expanding southward along the Peninsular Ranges, with another Slight Risk in effect as additional rainfall, on top of increasingly saturated conditions, will bring the threat for more instances of flooding. Some heavier rainfall is expected over portions of central California, and spreading into the Lower Colorado Basin by Saturday, but the flood threat looks to remain lower for these regions for now. Some heavier snow is also forecast for higher elevations of the Sierra Friday and into the weekend.  In the East, showers along the Coast should begin to come to an end from south to north in the Carolinas/Mid-Atlantic Thursday evening as a cold front pushes away from the coast. Rain, heavy at times, will linger into Friday for coastal New England as an area of low pressure intensifies offshore and continues to advect additional moisture in. While the rain will not be particularly intense, instances of flooding will remain a concern with some higher water levels due to additional snowmelt/runoff expected. The greatest risk will be through Friday morning, with a Slight Risk in effect, though some threat may linger into Saturday for Downeast Maine. Further inland, some snow will mix in, with some light accumulations possible through northern Maine. Precipiation should taper off through the day Saturday as the low pressure system moves away. An upper-level shortwave and accompanying surface frontal system passing through the Northern Plains will bring a wintry mix Friday, with some increasing chances for accumulating snowfall along the Canadian border from North Dakota into the Upper Midwest/Great Lakes. As the wave moves further east, shower and thunderstorm chances will increase Saturday along a quasi-stationary frontal boundary through portions of the Great Lakes/Midwest. Increasingly moist southerly flow may bring some more moderate to heavy showers as well as some thunderstorm chances by Saturday evening. An expanding area of warmer, above average temperatures is expected for portions of the central U.S. Thursday, from the Southern Plains northeastward into the Middle Mississippi/Lower Ohio Valley, as upper-level heights rise across the region. Some chilly morning lows  into the 30s are forecast for the Tennessee Valley into the Southern Appalachians Thursday morning, with Frost Advisories in place for portions of the regi

2m

Mar 29

Rainy, stormy weather continues along the East Coast through Thursday, lingering in New England Friday... ...Unsettled weather for the West, with a late season Atmospheric River impacting California Friday... ...Warming trend begins over Central U.S. on Thursday... Showers and storms will continue along the East Coast Thursday as a pair of slow moving cold fronts pass through the region. Locally heavy rainfall is expected over portions of eastern North Carolina and southeastern Virginia where a wave of low pressure will help to enhance convergence and storm converge/intensity. A Slight Risk of Excessive Rainfall (level 2/4) will continue through the overnight hours Wednesday into the day Thursday with some scattered instances of flash flooding possible. Storms will begin to clear the coast from south to north through the day Thursday as the lead front pushes into the Atlantic, lingering longest in New England. Here, an intensifying area of low pressure off the coast will keep moist onshore flow into the region through Friday. Some of the rain may be heavy at times Thursday along the coast, leading to some areal flood concerns when combined with snowmelt. Precipitation is expected to change over to snow for interior locations of the region by Friday night, with some light to moderate accumulating snowfall possible. Winds will also become a bit gusty Friday as the low deepens offshore. Areas of lower elevation coastal/valley rain and higher elevation/mountain snow will continue across the West Thursday and Friday, generally spreading further southward and eastward as a frontal system moves through the region. Some locally heavier snow totals will be possible for regional mountain ranges from the Pacific Northwest southward into northern/central California, as well as for the eastern Great Basin into the northern/central Rockies. The greatest impacts are expected in the northern Sierra through Thursday morning where a Winter Storm Warning is in place. A more intense system over the Pacific will approach California on Friday, bringing an enhanced onshore flow of anomalously high moisture/Atmospheric River directed at portions of central and southern California. Rainfall will pick up Friday into Friday night/Saturday morning along upslope portions of the Transverse Ranges, where a Slight Risk of Excessive Rainfall is in place, as a few inches of rainfall may lead to flooding, especially for terrain sensitive areas. This threat will continue into the weekend beyond the current forecast period. Elsewhere, some snow showers will linger Thursday for portions of the Upper Midwest/Great Lakes, particularly close to the Canadian border, as a low pressure system departs the region into Canada. A shortwave following this system will bring some additional light rain/snow showers to the Northern Plains into the Upper Midwest on Friday. Temperature-wise, some chilly morning lows dropping into the low to mid-30s are forecast Thursday across portions of the Mid-South into the Tennessee Valley following a cold front passage, with Frost/Freeze-related advisories and warnings in place for newly greening sensitive vegetation. Increasing upper-level ridging following the system over the East Coast and ahead of troughing over the West will bring warmer, above average temperatures broadly across portions of the High Plains Thursday, and into the Plains/Mississippi Valley/Midwest on Friday. Highs will remain either around or below average along the East Coast and across most of the West with the upper-level troughing in place. 

2m

Mar 28

Severe Weather potential over parts of the Upper Great Lakes tonight... Heavy to Excessive Rainfall possible over portions of the Southeast and Mid-Atlantic. Unsettled weather returns to the Northwest on Wednesday. Heavy snow and blizzard conditions associated with a deep mid-latitude cyclone that impacted the Northern/Central Plains and Upper Midwest the past few days has ended, but some lingering mainly light snows may continue into tonight across parts of the Upper Great Lakes. Behind the associated cold front, a chilly airmass will continue to spread across the Great Plains and Midwest into Wednesday. The greatest anomalies on Wednesday will be across the Northern Plains/Upper Midwest where daytime highs 15-25 degrees below average are possible, with temperatures moderating thereafter. Widespread showers and thunderstorms are expected to accompany the above mentioned cold front through Thursday as it slowly progresses through the Midwest and East Coast states. Into this evening, the Storm Prediction Center highlights portions of southern Michigan into Indiana and Ohio within a slight risk (level 2/5) of Severe Thunderstorms. On Wednesday, the heaviest rains are expected across parts of north Florida and into the Southeast as additional moisture gets pulled northward due to a second wavy front and developing surface low where WPC has a slight risk for excessive rainfall. Showers and storms will continue across the Northeast into Thursday, though heaviest rainfall should be confined across portions of the Carolinas and the DelMarVa, and up the Northeast Coast posing a mainly localized flash flood threat. Unsettled weather will continue across the Northwest during the short range, with low elevation rain and mountain snows. Favorable upslope regions may have the greatest threat for heavy to excessive rainfall, particularly across southwest Oregon/northwest California on Wednesday. Accumulating snowfall is possible particularly across the highest elevations of the Cascades, Sierra Nevada, and into the northern Rockies.

2m

Mar 27

Major Winter Storm through Tuesday over the Central Plains into the Upper Mississippi Valley... The major winter storm continues through Tuesday over the Central Plains into the Upper Mississippi Valley. Snow and strong winds will continue from the Central Plains to northern Minnesota through Monday night, along with sleet and freezing rain in parts of the Upper Mississippi Valley. In addition, hazardous impacts will be snow, icing, and wind. Blowing and falling snow will significantly reduce visibility, and blizzard conditions will persist into Tuesday across portions of the Plains and northern Minnesota. Travel may be very difficult or impossible at times. Power outages and tree damage are possible in some areas due to heavy snow, icing, and strong winds. Also, plan on slippery roads. Meanwhile, the front associated with the storm extends from the Middle Mississippi Valley/Southern Plains and moves eastward to the lower Great Lakes into the Central Gulf Coast by Wednesday evening. The system will create showers and severe thunderstorms over the Lower Mississippi Valley. Therefore, the SPC has issued an Enhanced Risk (level 3/5) of severe thunderstorms over parts of the Lower Mississippi Valley through Tuesday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. Additionally, there is an increased threat of EF2 to EF5 tornados over the area. In addition, the showers and thunderstorms will produce heavy rain over parts of the Middle/Lower Mississippi and Tennessee Valleys. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Middle/Lower Mississippi and Tennessee Valleys through Tuesday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. By Tuesday, the threat of severe thunderstorms decreases slightly to a Marginal Risk over parts of the Great Lakes/Ohio Valley, with a Slight Risk of severe thunderstorms over parts of the Central Gulf Coast. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Central Gulf Coast from Tuesday through Wednesday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, a few tornadoes, and a minimal threat of hail. Similarly, the showers and thunderstorms will create heavy rain over parts of the Central/Eastern Gulf Coast. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Central/Eastern Gulf Coast on Tuesday through Wednesday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. On Wednesday, the threat of severe thunderstorms ends. However, the threat of excessive rainfall continues over parts of the Eastern Gulf Coast and Southeast. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Eastern Gulf Coast and Southeast on Wednesday. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. Elsewhere, from Tuesday evening into Wednesday, moisture from the Atlantic will move onshore over New England, bringing warmer temperatures and trapping cold air in the interior of Northern New England. The warm, moist air will create rain/freezing rain over parts of Northern New England from Tuesday evening into Wednesday.

3m

Mar 26

Significant Winter Storm across parts of the Northern Plains and Upper Midwest There is a Sight Risk of excessive rainfall over parts of the Middle/Lower Mississippi and Tennessee Valleys on Monday and over parts of the Central Gulf Coast on Tuesday. There is an Enhanced Risk of severe thunderstorms over parts of the Central/Southern Plains on Sunday and the Lower Mississippi Valley on Monday. A Significant Winter Storm will develop over the Northern/Central Plains, Upper Mississippi Valley, and Upper Great Lakes from Sunday evening into Tuesday. The winter storm will be high-impact and an extensive system producing widespread heavy snow and gusty winds that will persist throughout the Northern Plains and Upper Midwest through Tuesday. Heavy snow will spread across much of the Northern Plains/Upper Midwest on Sunday and continue into Monday. There is a high chance (greater than 70%) of at least eight inches of snow extending from northern Nebraska and central South Dakota northeastward to northeastern Minnesota and northwestern Wisconsin. In addition, the storm will create hazardous impacts from heavy snow, snow load, and wind. Moreover, heavy snow and gusty wind will produce areas of blowing/drifting snow and possible blizzard conditions on Sunday into Monday. Likewise, hazardous travel and road closures are expected late Sunday into Monday. Strong winds and heavy, wet snow on trees and power lines may damage trees and cause power outages. Also, there will be a broad area of light rain/freezing rain over parts of the Central Plains into the Upper Great Lakes. Furthermore, strong wind gusts over 50 mph on Sunday may result in power outages, blowing dust with reduced visibility, difficult travel, and property damage as High Wind Watches and Warnings are over the Central/Southern Plains. Further, with the high wind, critical fire weather conditions are forecast for Sunday over the Southern High Plains. On Monday, the front moves into the Lower Mississippi Valley, creating showers and severe thunderstorms. Therefore, the SPC has issued an Enhanced Risk (level 3/5) of severe thunderstorms over parts of the Lower Mississippi Valley from Monday into Tuesday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. Additionally, there is an increased threat of EF2 to EF5 tornados over the area. In addition, the showers and thunderstorms will produce heavy rain over parts of the Central/Lower Mississippi and Tennessee Valleys. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Central/Lower Mississippi and Tennessee Valleys from Monday into Tuesday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. A surge of energy moving into the Northwest will aid in producing rain and higher-elevation snow over parts of Northern California on Monday afternoon into late evening. The energy will also create coastal rain and higher�elevation snow over parts of the Pacific Northwest through Tuesday afternoon. Moreover, higher-elevation snow will continue from the Northern Intermountain Region, Great Basin, Southwest, and Southern Rockies through Tuesday evening.  

3m

Mar 25

Heavy Snow over portions of Northern New England; Significant Winter Storm likely across parts of the Northern Plains and Upper Midwest... There is a Sight Risk of excessive rainfall over parts of the Northern Mid-Atlantic to Southern New England. There is a Slight Risk of severe thunderstorms over parts of the Central/Southern Plains on Sunday. A Significant Winter Storm will develop over the Northern High Plains and move into the Northern Plains, upper Mississippi Valley, and Upper Great Lakes from Saturday evening into Monday. The winter storm will be high-impact and an extensive system producing widespread heavy snow and gusty winds that will persist over parts of the Northern Plains and Upper Midwest through Monday. Widespread heavy snow will spread across much of central and eastern Montana by Saturday night, expand into the Northern Plains/Upper Midwest on Sunday, and continue into Monday. There is a high chance (greater than 70%) of at least eight inches of snow extending from central South Dakota northeastward to northeastern Minnesota and northwestern Wisconsin. In addition, the storm will create hazardous impacts from heavy snow, snow load, and wind. Moreover, heavy snow and gusty wind will produce areas of blowing/drifting snow and possible blizzard conditions on Sunday into Monday. Hazardous travel and road closures are expected late Saturday into Monday. Strong winds and heavy, wet snow on trees and power lines may damage trees and cause power outages. Furthermore, strong wind gusts over 50 mph on Sunday may result in power outages, blowing dust with reduced visibility, difficult travel, and property damage as High Wind Watches and Warnings are over the Central/Southern Plains. Meanwhile, low pressure over Southern New England moves northeastward into the Canadian Maritimes by Sunday. The storm will aid in producing heavy snow over parts of Northern New England through late Sunday morning. Additionally, heavy rain will develop over parts of the northern Mid-Atlantic and Southern New England through late Saturday night. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over the northern Mid-Atlantic/Southern New England through Sunday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. On Sunday, the threat of excessive rainfall ends over the Northeast. The snow will continue through late Sunday morning over Northern New England. Moreover, a front over the Great Basin/Southwest moves inland to the Central/Southern High Plains by Sunday afternoon and continues eastward to the Middle/Lower Mississippi Valley by Monday evening. The energy associated with the boundary will create higher-elevation snow and lower-elevation rain over parts of the Pacific Northwest, California, Great Basin, Southwest, and central/Southern Rockies through Monday morning. Further, as the front and dryline move out of the Rockies on Sunday, showers and severe thunderstorms will develop over the Central/Southern Plains. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Central/Southern Plains from Sunday into Monday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. On Monday, the front moves into the Lower Mississippi Valley, creating showers and severe thunderstorms. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Lower Mississippi Valley on Monday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts,

2m

Mar 24

Heavy snow likely across northern New York northern New England on Saturday. A wet weekend ahead for the East and West Coasts. A significant winter storm is in store for the northern Plains by Saturday night into Sunday morning. Quite an active weather pattern is quickly emerging across the country as we head into the weekend.  A high pressure system from Canada will set the stage for sustaining the cold air that is already in place across the northern tier states.  Meanwhile, a trough of low pressure currently sliding eastward into the western Gulf Coast region at the upper levels will be instrumental in developing a low pressure system that will gradually intensify and track up the East Coast during the weekend.  In the near term however, the upper trough will mutually interact with a mesoscale front and plenty of warm/moist air in the Gulf of Mexico to bring a round of heavy rain mainly across southern Florida through tonight.  The heavy downpours are expected to be accompanied with strong to severe thunderstorms and possibly squalls as the core of the system passes through.  By Saturday, the heavy rain will likely taper off to scattered showers behind a cold front across Florida.  Meanwhile, the heavy rain is expected to overspread much of the Eastern Seaboard on Saturday where widespread 1-3 inches of rainfall will likely result in flooding concerns along the I-95 corridor as a low pressure wave is forecast to track up the East Coast along a sharp coastal front. Farther north, the low pressure system will interact with the cold air mass in place across the northern tier states to bring a round of heavy snow from northern New York across northern New England on Saturday where one foot to locally 20 inches of new snow is anticipated.  It appears that there will be a narrow zone of transition across central New England to coastal Maine where heavy freezing rain and sleet can be expected Saturday night as the low pressure wave approaches.  The precipitation will then rapidly change over to snow before ending early Sunday morning as the system exits into the Canadian Maritimes. Meanwhile, another upper trough and surface low pressure system from the eastern Pacific are heading toward the West Coast.  This system will bring widespread mountain snow and lower-elevation rain into the Pacific Northwest and California on Saturday where a couple inches of rain is possible near the coast, and up to a couple of feet of heavy snow for the Sierra Nevada.  The system will reach into the Great Basin, the Intermountain region and into the northern Rockies Saturday night.  From Saturday night into early Sunday, a low pressure system is forecast to develop and intensify over the central High Plains.  This system will then interact with the cold air mass already in place across the northern tier states to deliver a significant winter storm across the northern Plains by Sunday morning. 

3m

Mar 23

Early Spring heavy snows expected from the Upper Mississippi Valley into the Great Lakes, northern NY State into Northern New England. Widespread wet weather expected from East Texas, across the South, much of Florida and the Eastern Seaboard. The beginning of a wet pattern for the Pacific Northwest, south into northern to central California. Winter weather will continue to dominate the northern tier of the nation during this first week of spring 2024.  In the wake of heavy snows that have fallen across portions of northern New England over the past 24 hours, additional heavy snow is expected to spread eastward Thursday night into Friday from the Northern Plains, across the Upper Mississippi Valley and into the Lower Great Lakes.  This heavy snow will then push eastward into Northern NY State and Northern New England on Saturday.  Across these areas, snowfall accumulations of 8 to 12 inches are possible.  During the day on Saturday, yet another round of wintry weather with accumulating snows will begin to develop across the Northern High Plains and spread eastward through the remainder of the Northern Plains Sunday and into the early part of next week.  In addition to the potential series of snow events across the northern tier, temperatures will remain well below average for the end of the work week and into the weekend. At the same time that snows spread eastward across the northern tier of the nation, a widespread rain event will continue to expand from the western Gulf coast Thursday afternoon, eastward across large portions of the South and Florida Thursday night into Friday.  This widespread heavy rain will then push northward along much of the Eastern Seaboard Friday into Saturday.  Some of the heaviest rainfall totals are expected across South Florida Friday afternoon into early Saturday, with the potential for urbanized flash flooding, especially along the southeast coastal areas of the state.  Localized flash flooding also possible along the Mid-Atlantic coast, including the urban corridor from DC to Boston where rainfall totals of 2 to 3 inches are possible. An active wet weather pattern will also to begin along large portions of the West coast from the Pacific Northwest, south into northern to central California.   Precipitation will begin to push inland on Friday across these areas, with rounds of additional precipitation expected into the weekend, with heavy snows in the 1 to 3 foot range expected through the Sierra.  While there may be a break to the wet west coast pattern early next week, the overall wet winter pattern that has affected the west coast will continue later next week as additional storm systems push inland.

3m

Mar 22

Snow showers forecast throughout the Northeast over the next few days; accumulating snowfall forecast in portions of New England. Light to moderate snow spreads from the northern Plains to the Great Lakes by Friday; strong winter storm expected this weekend. Shower and thunderstorm chances return to the Southern Plains and Gulf Coast The forecast remains on track for a low pressure system to deepen this evening across the Interior Northeast and New England, producing periods of snowfall while also reinforcing lake enhanced snow showers in its wake. Minor to locally Moderate potential winter storm impacts can be expected with this round of snowfall through tomorrow afternoon focused over portions of northern New Hampshire and Maine, where high probabilities (80-90%) of at least 4 inches of snow are noted.  Meanwhile, a separate winter storm is anticipated to produce a swath of snow beginning tonight between the northern Plains and Great Lakes through the end of the work week as a precipitation shield develops along an emerging frontal wave, which shifts eastward by tomorrow night. High probabilities for at least 4 inches of snow remain across northwest Montana, with medium to high probabilities (40-80%) extending from north-central Montana to central Minnesota, including southern South Dakota, where a swath of Winter Weather Advisories are in effect. Greater chances for moderate to heavy snow shifts to the Upper Midwest and Great Lakes by Friday, where there is the potential for up to 10-12 inches of snow. Beyond this first round of Northern Tier snowfall, the pattern will remain quite active looking into this weekend as confidence is increasing that a large storm system will produce a swath of heavy snow, freezing rain, and sleet across portions of the Northern Plains and Upper Midwest into early next week. Residents should remain weather aware and up to date with the latest forecast as details change with these next two dynamic snowfall events. Elsewhere, unsettled weather is set to return to the southern Plains, Gulf Coast, and parts of the West Coast. An uptick in shower and thunderstorm activity is expected tonight and tomorrow over portions of Oklahoma and Texas as a stubborn upper-low ejects into the Southern Plains tonight. By tomorrow, rain could become heavy enough along the western Gulf Coast and southeast Texas to produce isolated flooding concerns. This system is forecast to progress eastward into the Gulf of Mexico on Friday, spreading showers and thunderstorms along the entire Gulf Coast, as well as eventually Florida and the Southeast by late Friday. However, both the severe and flooding threat associated with this system remain marginal. For the West Coast, light to moderate rain is expected to move inland across northern California and the coastal Midwest on Friday. As the axis of precipitation along a frontal boundary intersects the Sierra on Friday night, heavy snow is possible throughout the mountainous terrain.

3m

Mar 21

Lake effect snow continues downwind of Lake Ontario, before a developing low pressure system spreads snowfall east into northern New England tomorrow... Light to moderate snow enters the northern Plains midweek and pushes into the Upper Midwest on Thursday. Shower and thunderstorm chances return to the Southern Plains and western Gulf Coast. Cool and breezy weather remains entrenched across the eastern half of the country as a secondary cold front over the Midwest reinforces the chilly airmass overhead. One consequence of the renewed northwest flow crossing over relatively warm lake waters will be additional lake effect snow showers focused downwind of Lake Ontario in New York, which will be further enhanced as a low pressure system crosses from southern Ontario, Canada towards Maine through early Thursday. The forecast continues to highlight Medium probabilities (40-70%) for at least 6 inches of snow through Thursday across portions of the Interior Northeast and New England. Gusty winds and below average temperatures are forecast in the systems wake, with highs only expected to reach into the 30s and 40s throughout the Great Lakes, Ohio Valley, and Northeast by the end of the work week. Over the nations Heartland, snow potential will return to the Northern Plains and Rockies tomorrow morning as a stalling cold front interacts with favorable jet stream dynamics. Northwest Montana maintains the highest chances of seeing over 4 inches of snowfall (80%), although portions of the Northern Plains and Midwest could locally exceed 4 inches by Friday as a low pressure wave spins up along the aforementioned stationary front. Uncertainty remains on exactly where the heaviest snowbands may set up, but residents should remain weather aware and prepare for potentially difficult travel across the Upper Midwest between Thursday night and Friday morning. In the warm sector of the font, rain and thunderstorm chances return on Wednesday as an upper low lingering over the Southwest finally ejects eastward. A few isolated thunderstorms could turn severe over western Oklahoma and the Texas Panhandle, as well as south-central Texas. By Thursday, heavy rain may develop along the Texas and Louisiana Gulf Coast, which could lead to isolated flooding concerns. As far as the temperature highlights for the short term time period, lingering frost concerns remain across portions of the Southeast through tomorrow morning, although this cold snap is forecast to be short-lived as temperatures warm to near average by Thursday across the South. Meanwhile, above average temperatures are expected today across the central Plains and Northwest. A few daily temperature records remain possible today across the northern Great Basin and Pacific Northwest as thermometer readings soar into the 70s.

2m

Mar 20

Heavy lake-effect snow downwind from Lakes Erie and Ontario; moderate to heavy lake-effect snow over the eastern U.P. of Michigan. Light to moderate snow over parts of the Northern High Plains on Wednesday. There is a Marginal Risk of severe thunderstorms over parts of Florida. A front moving off of Florida will create showers and strong to severe thunderstorms over Florida. Therefore, the SPC has issued a Marginal Risk (level 1/5) of severe thunderstorms over parts of Florida through Tuesday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. By Tuesday, the showers and thunderstorms move off the southern tip of Florida as the front moves offshore. Meanwhile, upper-level energy over the Ohio Valley into the Northeast will move off the Northeast Coast by Tuesday morning. Additionally, upper-level energy will move over the Great Lakes into the Northeast on Tuesday. Furthermore, a second front moving south and eastward from Central Canada will move over parts of the Northern Plains/Upper Mississippi Valley on Monday evening, moving to the Great Lakes by Tuesday and to the Northeast Coast by Wednesday. The energy, and later the front, will aid in creating lake-effect snow downwind from the Great Lakes through Wednesday. With the front, moderate to heavy snow will develop over the eastern U.P. of Michigan Tuesday evening into Wednesday. Additionally, heavy lake-effect snow develops downwind from Lakes Erie and Ontario. Further, moderate snow will develop over the higher elevations of the Northeast through Wednesday evening and snow showers over parts of the Ohio Valley and the Central Appalachians through Tuesday afternoon. Along the western end of the front moving out of Canada, snow will develop over parts of the Northern Rockies/Northern High Plains overnight Tuesday into Wednesday. Moreover, an upper-level low over the Southern California/Southwest will slowly move eastward to the Southern High Plains by Wednesday evening. The energy will produce snow and lower-elevation rain over parts of the Southwest and Southern Rockies, lingering through Wednesday afternoon. As the energy moves out of the Rockies, showers and thunderstorms will develop over parts of the Southern Plains. Farther north, a dissipating front moves near the Pacific Northwest on Wednesday into Wednesday afternoon and will produce rain over parts of the Northwest.

2m

Mar 19

Heavy lake-effect snow downwind from Lakes Erie and Ontario; snow over the Southwest/Southern Rockies. There is a Slight Risk of excessive rainfall over parts of the Central Gulf Coast There is a Marginal Risk of severe thunderstorms over parts of the Central Gulf Coast and Florida. A front extending from Maine over the Western Atlantic, coming back onshore over the Southeast, and stretching across the Gulf Coast on Sunday will slowly move southward across Florida by Monday evening. A wave of low pressure on the boundary over the Central Gulf Coast moves eastward to the Southeast by Monday. The circulation around the low will pull moisture off the Gulf of Mexico, aiding in the production of showers and thunderstorms with heavy rain over parts of the Central Gulf Coast. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Central Gulf Coast through Monday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. In addition, the thunderstorms will be strong to severe along parts of the Central/Eastern Gulf Coast. Therefore, the SPC has issued a Marginal Risk (level 1/5) of severe thunderstorms over parts of the Central/Eastern Gulf Coast through Monday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, and a minimal threat of tornadoes and hail. On Monday, the threat of excessive rainfall ends over the Gulf Coast. However, the threat of showers and strong to severe thunderstorms moves over Florida. Therefore, the SPC has issued a Marginal Risk (level 1/5) of severe thunderstorms over parts of Florida from Monday into Tuesday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, and hail, with a minimal threat of tornadoes. By Tuesday, the showers and thunderstorms move off the southern tip of Florida as the front moves offshore. Meanwhile, upper-level energy over the Upper Midwest into the Northeast will aid in creating lake-effect snow downwind from the Great Lakes, with moderate to heavy snow downwind from Lakes Erie and Ontario through Tuesday evening. Additionally, moderate snow will develop over the higher elevations of the Northeast, with snow showers over parts of the Ohio Valley and the Central Appalachians through Tuesday afternoon. Moreover, an upper-level low over the Four Corners Region will produce snow and lower-elevation rain over parts of the Southwest and Southern Rockies, lingering through Tuesday. Furthermore, a second front moving south and eastward from Central Canada will move over parts of the Northern Plains/Upper Mississippi Valley on Monday afternoon, moving to the Great Lakes by Tuesday. The system will produce light snow over parts of the Upper Mississippi Valley overnight Monday and of the Upper Great Lakes on Tuesday. 

2m

Mar 18

Heavy lake-effect snow over parts of the western U.P. of Michigan and lake-effect snow downwind from the Great Lakes; moderate to heavy snow over the Southern Rockies. There is a Slight Risk of excessive rainfall over parts of the Southern Plains and Western/Central Gulf Coast. There is a Slight Risk of severe thunderstorms over parts of southern Texas. A front extending from the Great Lakes to the Central Plains will move off the Northeast Coast by Sunday evening. In the wake of the front, upper-level energy moves across the Great Lakes and the Northeast through Monday evening. The upper-level energy will create lake-effect snow downwind from the Great Lakes. The heaviest lake-effect snow will be over the western portion of the U.P. of Michigan from Saturday evening into Sunday evening. A second area of heavy lake-effect snow will develop downwind from Lake Ontario Sunday night into Monday. In addition, snow will develop over parts of the Central Appalachians and the higher elevations of the Northeast, likewise, from Sunday evening into Monday. Moreover, an upper-level low over the Four Corners Region will produce moderate to heavy snow over parts of the Central/Southern Rockies through Sunday evening. The energy will also create snow and lower-elevation rain over parts of the Great Basin, Southwest, and Southern Rockies through Monday. Meanwhile, a second front extending from the Southeast to southern Texas will move off the Gulf Coast on Monday. With favorable upper-level flow, showers and severe thunderstorms develop over parts of southern Texas. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of southern Texas through Sunday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. Further, there is an increased threat of hail, two inches or greater, over South-Central Texas. Furthermore, the showers and thunderstorms will also have heavy rain over parts of the Southern Plains/Western Gulf Coast. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Southern Plains/Western Gulf Coast through Sunday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. On Sunday, the severe thunderstorm threat decreases slightly to a Marginal Risk (level 1/5) along the Western/Central Gulf Coast through Monday morning. Moreover, the showers and thunderstorms will produce heavy rain over the Central Gulf Coast. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Central Gulf Coast from Sunday into Monday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. The threat of excessive rainfall ends by Monday. However, showers and thunderstorms will develop over parts of Florida through Monday evening.

2m

Mar 17

Heavy mountain snow expands across Four Corners and Southern Rockies this weekend. Severe Thunderstorm and Excessive Rainfall chances shift south into the Southeast and Gulf Coast States. Mild weather continues across the Pacific Northwest and East Coast. A closed upper low will continue spinning over the Southwest this weekend, while an upper ridge builds over the Northwest and a deep trough descends into the Great Lakes/Midwest. Shortwave energy will round the base of the closed low in the Southwest and accelerate through Texas and the Gulf Coast leading to heightened Severe Weather and Excessive Rainfall threats this weekend. At the surface, a slow moving cold front will eventually stall out along the Gulf Coast and be the focus for thunderstorms and heavy rainfall. Tonight, scattered to isolated thunderstorms (some severe) will develop along the cold front extending from the Edwards Plateau into south-central Texas. An Enhanced Risk (level 3/5) of Severe Thunderstorms is in effect for those areas tonight, while a Slight Risk (level 2/5) extends from there out across the central Gulf Coast and into the Florida panhandle, where very large hail and isolated damaging winds are expected. In addition to that, a Slight Risk of Excessive Rainfall (at least 15%) is in effect for those same areas where 3-4 inches of rainfall may accumulate. The Slight Severe Weather and Excessive Rainfall Risks continue over southern Texas on Saturday where the cold front will stall out. Scattered showers and thunderstorms will continue across the central Gulf Coast as well. While heavy snow diminishes later today across the central Rockies, heavy snow will expand and intensify across the Four Corners this weekend and is likely to redevelop over the Southern Rockies on Sunday. For the higher elevations of the Southwest and Four Corners region, including portions of the Mogollon Rim north into the southern Wasatch and the San Juans, snow probabilities for amounts of at least 12 inches are moderate to high (50-90%). Localized totals up to 2 feet are possible. By Sunday, the heaviest snowfall is expected to transition to the Sangre de Cristo and Jemez Mountains. Heavy snow rates of up to 2"/hr and gusty winds exceeding 35mph (locally higher to 50mph) will cause blowing snow and reduced visibility, especially across the mountain roads and passes. This will create difficult to at times impossible travel, with road closures likely. Disruptions to infrastructure due to power outages are possible as well. Elsewhere, an upper ridge will promote increasing heights and above average temperatures for the Northwest this weekend. High temperatures in the 60s and 70s will be 15-25 degrees above average for this time of year. Meanwhile, a deep upper level trough will supply ample southerly flow into the East Coast through Sunday after which a cold front will sweep through and return temperatures to seasonal averages. This weekend though, highs should be 5-15 degrees above average up and down the coast.

2m

Mar 16

Heavy snow continues into tonight for the Central Rockies and adjacent foothills/High Plains before gradually tapering off through Friday.   A long-duration event of mountain snow and lower-elevation rain expected over the Four Corners region into the weekend. Severe thunderstorms and excessive rainfall expected to push southeastward from the Southern Plains/Mississippi Valley Thursday evening further into Texas and the Southeast region on Friday, continuing in Texas Saturday Mild weather continues from the central to the eastern U.S. going into the weekend An amplifying upper-level trough/closed low continues to dig southward into the western U.S. with a cold airmass settling in across the region. Moisture flowing in ahead of the trough continues to lead to very heavy snow over portions of the Central Rockies into the adjacent High Plains, particularly along the Front Range. Snow rates upwards of 2"/hr will bring several more inches of snow through tonight with storm total snowfall of 1-2 feet, locally as much as 2-4 feet. Gusty winds leading to blowing snow will make travel very dangerous to impossible, with many of the local interstates already closed. The snow should begin to gradually taper off Thursday night and into Friday morning. Snowfall will then shift a bit to the southwest over the Four Corners region as the upper-low settles in overhead for the next couple of days. Waves of heavy snow will bring 12"+ of snowfall to the higher elevations of the regional mountain ranges into this weekend. Lower elevations of the Four Corners will see a mix of rain and snow, though any accumulations should remain limited, with rain also spreading to the Desert Southwest. Some thunderstorms will also be possible. Precipitation chances should continue at least through Saturday evening. To the east, widespread showers and thunderstorms will continue along and head of a wavy cold front stretching from the Great Lakes/Midwest southwestward through the Middle Mississippi Valley and into the Southern Plains. The Storm Prediction Center has outlined an Enhanced Risk of severe weather (level 3/5) from north Texas northeastward into eastern Oklahoma, northwestern Arkansas, and southern Missouri through tonight where the best combination of strong buoyancy and both low-level and deep-layer wind shear are expected to lead to some supercell storms. Storms will likely begin to cluster into the evening bringing more of a large hail and damaging wind threat, though a few tornadoes will remain possible with any remaining discrete/semi-discrete storms, including the potential for a strong tornado. A broader Slight Risk (level 2/5) is in place from the Southern Plains northeastward through the Middle Mississippi Valley/Mid-South and into the Ohio Valley where some more isolated instances of large hail, damaging winds, and a few tornadoes are possible. In addition, a southerly influx of deep moisture from the Gulf of Mexico along with storms clustering/motions increasingly parallel to the frontal boundary will bring the threat of some very heavy downpours and the risk of scattered instances of flash flooding, with a Slight Risk of Excessive Rainfall (level 2/4) overlapping the Enhanced severe risk, and continuing downstream into the Mid-South as storms move eastward overnight. Elsewhere, a clipper system dropping southeastward from Canada into the Upper Midwest/Great Lakes by Friday evening will bring some light to moderate rain/snow shower chances into Saturday. Temperature-wise, above average highs will continue to bring an early taste of Spring to most of the central and eastern U.S. heading into the weekend. 

2m

Mar 15

.Heavy snow over parts of Central Rockies Wednesday night into Thursday and the Mogollon Rim and the San Juans Thursday night into Friday... ...There is an Enhanced Risk of severe thunderstorms over the Plains and Mississippi Valley from Wednesday to Thursday... ...There is a Slight Risk of excessive rainfall over parts of the Central/Southern Plains and Middle/Lower Mississippi Valley on Wednesday and Thursday, extending into Southeast and Tennessee Valley on Friday... A wave of low pressure along a front over Central Plains moves northeastward to the Northeast by Friday. The storm will create a significant and long-duration winter storm across the Central and Southern Rockies beginning Wednesday, followed by a round of heavy snow for the Southern Rockies and Four Corners region Thursday night. The winter storm will spread heavy snow Wednesday night across the Central Rockies through Friday, with snow expanding into the Southern Rockies beginning Thursday. A second round of heavy snow will develop over the Four Corners late Thursday and persist into the weekend. Heavy snow across the Central/Southern Rockies will become heavy Wednesday night across the Central Rockies with snowfall rates exceeding 2 inches per hour possible (40-60%) in the Front Range Wednesday evening and Thursday. The snowfall rates are expected (greater than 90%) to produce more than 1 foot of snow across much of the Front Range, Foothills, Sangre de Cristos, and San Juans. Locally, 2-4 feet of snow are possible (20-30%). The storm will significantly impact travel. The combination of heavy snowfall rates and wind gusts exceeding 35 mph will cause blowing snow and severely restricted visibility, especially along the I-25 urban corridor and other mountain roads in the region. Travel will be difficult to impossible. Expect road closures. Disruptions to infrastructure due to power outages are also possible. A second phase of the winter storm will impact the Four Corners Region beginning Thursday night. Waves of heavy snow will affect the terrain areas north of the Mogollon Rim and northeastward toward the San Juans and southern Colorado Rockies. Snow probabilities for 8 inches are moderate to high (greater than 50%). Localized totals above a foot are possible for the higher terrain. Moreover, rain will develop over the lower elevations of the Southwest and Southern Rockies. Furthermore, overnight Wednesday, showers and severe thunderstorms will expand along the front from the Central Plains/Middle Mississippi Valley. Therefore, the SPC has issued an Enhanced Risk (level 3/5) of severe thunderstorms over the Central Plains/Middle Mississippi Valley through Thursday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. Additionally, there is an increased threat of hail two inches or greater over parts of the area. In addition, the showers and thunderstorms will create heavy rain over the Central Plains/Middle Mississippi Valley. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Central Plains/Middle Mississippi Valley through Thursday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. On Thursday, the showers and severe thunderstorms move south and eastward into the Southern Plains/Lower Mississippi Valley. Therefore, the SPC has issued an Enhanced Risk (level 3/5) of severe thunderstorms over the Southern Plains and Middle/Lower Mississippi Valley from Thursday into Friday morning. 

3m

Mar 14

Heavy snow over parts of Central Rockies Wednesday night into Thursday. There is a Slight Risk of severe thunderstorms over the Plains and Mississippi Valley from Wednesday to Thursday, There is a Slight Risk of excessive rainfall over parts of the Southern Plains/Lower Mississippi Valley on Thursday. A front extending from the Northern High Plains to the Great Basin will merge with a front extending from the Upper Great Lakes to the Southern High Plains overnight Wednesday, moving to the Southern Plains and Southwest by Thursday evening. The western boundary will produce coastal rain with embedded thunderstorms and snow over the Cascades through Wednesday morning. Snow will also develop over parts of the Northern Intermountain Region, Great Basin, and Northern Rockies Through Wednesday morning. On Wednesday, an upper-level low will develop over the Great Basin. The upper-level low will draw moisture northwestward from the Gulf of Mexico. Heavy snow will begin to develop over parts of the Central Rockies Wednesday afternoon into evening. Furthermore, the significant and long-duration winter storm will develop across the Central and Southern Rockies beginning Wednesday, followed by a round of heavy snow for the Southern Rockies and Four Corners region Thursday night. Further, snow probabilities are high (greater than 70% chance) for at least 1 foot for most of the Colorado Rockies, the Front Range Mountains, the Foothills, and the Palmer Divide. Localized higher amounts are expected and could exceed 2 feet across the Front Range Mountains (30-50% chance). Confidence is also increasing for a significant snowfall for the I-25 corridor and snow probabilities for at least 8 inches are high (greater than 70% chance). A second phase of the winter storm will impact the Four Corners Region beginning Thursday night. Waves of heavy snow will impact the terrain areas north of the Mogollon Rim and northeast toward the San Juans and southern Colorado Rockies. Snow probabilities for 8 inches are moderate to high (greater than 50%). Localized totals above a foot are possible for the higher terrain. Hazardous to very difficult travel is expected as heavy snow and intense snow rates at times (1-2 inches plus per hour) will lead to deteriorating travel conditions beginning Wednesday and Wednesday night across the Central/Southern Rockies and beginning across the Four Corners region Thursday night. Moreover, on Wednesday evening, as the front begins to merge with the Eastern Front, showers and severe thunderstorms will develop over parts of the Central Plains/Middle Mississippi Valley. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Central Plains/Middle Mississippi Valley from Wednesday through Thursday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. Additionally, there is an increased threat of hail two inches or greater over parts of the area. Furthermore, overnight Wednesday, showers and thunderstorms will expand along the front from the Central Plains/Middle Mississippi Valley into the Ohio Valley/Great Lakes and extend into parts of the Southern Plains/Lower Mississippi Valley. On Thursday, showers and severe thunderstorms will extend from the Middle Mississippi Valley to the Southern Plains/Lower Mississippi Valley. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Middle Mississippi Valley to the Southern Plains/Lower Mississippi Valley on Thursday. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few torna

3m

Mar 13

Great Weather for Spring Break all this week in South Florida. Unsettled weather is expected from the Pacific Northwest and northern California into the central Rockies with lower-elevation rain and higher elevation snow through mid-week. An increased risk of wildfires will shift southward from the central Plains today into the southern High Plains for Tuesday and Wednesday. Anomalously warm temperatures to expand eastward from the Upper Midwest into the Ohio Valley, Mid-Atlantic and Northeast through Wednesday. An upper level disturbance over the western U.S. today will weaken as it translates eastward, to be followed by a stronger impulse to reach the West Coast this evening. A Pacific front will move across the western U.S. through Wednesday, bringing mountain snow and lower elevation rain, along with cooler than average temperatures. Snowfall totals of 6-12 inches are expected into the higher terrain with totals over a foot likely for the highest elevations across the West into the northern and central Rockies. Rain or a rain/snow mix can be expected for the lower elevations as the storm system advances south and east. Low relative humidity and gusty winds have prompted Critical Risk fire weather concerns across a good portion of central Plains into the Texas Panhandle and a portion of eastern Wyoming through the rest of Monday. A surface low will develop across the central High Plains on Tuesday, advancing eastward with time. Dry conditions with gusty winds will shift fire weather concerns into the southern High Plains for Tuesday and Wednesday while precipitation develops northward during the day on Wednesday. The departure of a strong surface low near Nova Scotia into the western Atlantic will allow for a gradual lowering of gusty winds across the northern Mid-Atlantic and Northeast through Tuesday. Breezy conditions are likely to remain for northern New England into Tuesday night, but overall improvement is expected. High pressure over the southern U.S. will slide eastward over the next couple of days, allowing winds to return from the south, bringing warmer temperatures northward. The greatest departures from normal highs will remain over the Upper Midwest and Great Lakes region on Tuesday which may cause a few record daily maximum temperatures to be broken, but the magnitude of the anomalous warmth is likely to be lower on Tuesday compared to Monday. High temperatures in the 60s to lower 70s will expand eastward through Wednesday across the Ohio Valley and portions of the northern Mid-Atlantic into the Northeast, roughly 15 to 25 degrees above mid-March averages. With the warmer weather will come the threat for thunderstorms across portions of the central U.S. Some severe thunderstorms will be possible ahead of a dryline from eastern Oklahoma/Kansas into western Missouri on Tuesday with a broader risk across some of these same areas on Wednesday.

2m

Mar 12

Colder temperatures and strong gusty winds to impact the Northeast into Monday as snow continues to impact the northern Appalachians and portions of the lower Great Lakes. Unsettled weather is expected to persist across the Pacific Northwest and into the northern Rockies with multiple rounds of lower-elevation rain and higher elevation snow. Fire danger to increase across the central and southern High Plains from very dry conditions, gusty winds, and warm temperatures. A strong area of low pressure will continue to impact the Northeast going through tonight and early Monday with areas of locally heavy snow continuing across portions of the northern Appalachians and especially the higher terrain from the Adirondacks of New York up across the Green and White Mountains of Vermont and New Hampshire respectively. A combination of moisture wrapping around the deep low center and much colder air pouring southeast from Canada will result in locally an additional 6 to 12 inches of snow before the snow begins to taper off by later Monday. Meanwhile, the cold air pouring southeast over the lower Great Lakes will yield a continuation of locally heavy lake-effect snow shower activity and squalls. Portions of northwest Pennsylvania, western New York, and the higher terrain of the central Appalachians are expected to see a few more inches of snow this evening and overnight before the activity begins to taper off early Monday. In the wake of the gradually departing low center over the Northeast, temperatures to start off the new week will be generally below normal across the Eastern Seaboard and most of the Gulf Coast region. High pressure will settle down across the region going through Tuesday before then gradually advancing offshore. Temperatures are expected to begin rebounding rather quickly for much of the East and the South by later Tuesday as milder air from the Plains and Midwest advances east and couples with warm air beginning to return north from the Gulf of Mexico. Temperatures over the next couple of days will be well above normal across especially the central and northern Plains and the Midwest which will then gradually advance into the Great Lakes and Ohio Valley. High temperatures across portions of eastern South Dakota, Minnesota, Iowa, and Wisconsin are forecast to be as much as 30 to 40 degrees above normal on Monday and Tuesday with temperatures approaching or locally exceeding 70 degrees. Some cities will likely be warm enough to see their daily high temperature records either tied or broken. Very warm temperatures over the central and southern High Plains are expected going through the first half of the week, and this coupled with increasingly gusty winds and low relative humidity will promote an increased risk of wildfire activity. In fact, the Storm Prediction Center has highlighted large areas of the central and southern High Plains in an elevated to critical fire danger area. This will include the panhandles of Texas and Oklahoma where devastating fires occurred a couple weeks ago. Meanwhile across the Pacific Northwest, multiple low pressure systems arriving from the Pacific will bring frequent rounds of precipitation onshore and then farther inland into the northern Rockies early this week. Moderate to locally heavy rain is expected for the coastal ranges with heavy snow over the higher elevations of the Cascades, northern Sierra Nevada, and the Sawtooth, Bitterroot, and Teton ranges of the northern Rockies. As much as 1 to 2 feet of new snow can be expected, with generally the heaviest totals expected over the Washington Cascades.

2m

Mar 11

Locally heavy rains and strong winds are expected for portions of the northern Mid-Atlantic and southern New England through tonight Heavy wet snow and strong winds are expected across portions of the northern Appalachians tonight through Sunday followed by lake-effect snows across the lower Great Lakes into Monday morning. Unsettled weather is expected across the Pacific Northwest and into the northern Rockies as multiple rounds of lower-elevation rain and higher elevation snow arrives. Multiple consolidating areas of low pressure along with the arrival of a couple of cold fronts along the Eastern Seaboard will yield areas of heavy precipitation overnight, and particularly from parts of the northern Mid-Atlantic and into the Northeast. This will include locally heavy rain for portions of eastern Pennsylvania and New Jersey up across southeast New York and into southern New England. As a consolidated area of deepening low pressure approaches and crosses through southern and eastern New England, locally strong winds, especially for New England can be expected as well. Sufficient cold air is expected to filter south into the northern Appalachians to allow for the rain overspreading areas of northern New York and northern New England to change over to snow later tonight into Sunday, and as much as 6 to 12 inches of heavy wet snow can be expected along with strong gusty winds as low pressure lifts northeast across the region. Locally heavier snowfall totals can be expected over the higher peaks of especially Vermont, New Hampshire and Maine. On the back side of the departing area of low pressure, colder air will be surging southeast across the Great Lakes and into much of the Mid-Atlantic and Northeast, and this will gradually favor areas of heavy lake-enhanced snow showers and squalls. Portions of the lower Great Lakes and even the central Appalachians are expected to see locally over 6 inches of snow from the lake effect potential. Elsewhere, unsettled weather will impact the Pacific Northwest and the northern Rockies as multiple fronts and surges of Pacific moisture arrive across the terrain going into early next week. Moderate to locally heavy rain is expected for the coastal ranges with heavy snow over the higher elevations of the Cascades, northern Sierra Nevada, and the Sawtooth and Bitterroot range of the northern Rockies. The heaviest snows should be over the Washington Cascades going through Monday where 1 to 2 feet of new snow can be expected. Temperatures will generally be cooler than normal across the Mid-Atlantic and Northeast for the end of the weekend and early next week, but will be much warmer than normal across much of the central and northern U.S. otherwise. Near normal temperatures are expected over much of the West.

2m

Mar 10

Snow gradually tapering off over the central High Plains as well as central/southern Rockies. Threat of flash flooding and severe weather expected to sweep across the Deep South to the Southeast the next couple of days. An intensifying low pressure system will bring locally heavy rain and strong winds from the Ohio Valley to New England late Saturday into Sunday. Wet snow expected across the Great Lakes to northern New England late Saturday to Sunday as next round of rain and mountain snow reaches the Pacific Northwest. The mid-section of the country will be in an unsettled pattern with active to locally severe weather into the weekend as upper-level Pacific moisture in association with a subtropical jet stream will interacts with a cold air mass dipping into the center of the country. Meanwhile lower-level moisture from the Gulf of Mexico will be ingested into the system as well.  These complex interactions will result in an axis of heavy rain and possibly severe weather to develop over the Lower Mississippi Valley spreading across the Gulf states and into the Southeast by Saturday. The Storm Prediction Center has Slight Risks in effect for sever weather through Sunday morning for parts of the Deep South and Southeast. The Weather Prediction Center has Moderate an Slight Risks in effect for much of the same region for excessive rainfall and flooding concerns. Meanwhile to the north, a low-level disturbance that has been sustaining locally heavy snow over the central High Plains is forecast to weaken and allow the snow there, as well as the snow over the central to southern Rockies, to gradually taper off into this evening.  By Saturday, a low pressure center is forecast to consolidate over the Ohio Valley when the system intensifies more rapidly and tracks northeastward into the lower Great Lakes Saturday night. This will lead to areas of locally heavy rain along with increasingly strong and gusty winds to develop from the Ohio Valley to New England late Saturday into Sunday.  Colder air wrapping around the low pressure center is expected to change the rain to wet snow from across the Great Lakes to portions of northern New England especially for the higher elevations. In the wake of these systems high pressure will build in over the central U.S. and will promote drying out Saturday. The dry weather will extend into much of the western U.S. However, moisture associated with the next Pacific system is forecast to reach the Olympic Peninsula later today with rain for the lower elevations and snow for rather high elevations.  The rain and mountain snow will expand southward across Oregon and into northern California on Saturday into Saturday night.  The Cascades will see snow picking up intensity on Saturday as the next batch of moisture gets ready to reach the coastline of the Pacific Northwest by early on Sunday.

3m

Mar 09

Scattered heavy snow over parts of Central/Southern Rockies... There is a threat of flash flooding and severe weather that moves eastward each day from the Southern Plains to the Southeast from Thursday to Saturday. here is a Moderate Risk of excessive rainfall over parts of the Southeast on Friday. A front extending from the Upper Great Lakes to the Southern High Plains on Thursday evening moves eastward to the Lower Great Lakes, Mid-Atlantic, and Central Gulf Coast by Saturday evening. Moisture pooling along the front will aid in developing showers and severe thunderstorms over parts of the Central/Southern Plains and Middle Mississippi Valley. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Southern Plains through Friday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. Additionally, there is an increased threat of hail two inches or greater over parts of the area. Moreover, the front will create heavy rain over parts of the Southern Plains. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Southern Plains through Friday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. In addition, the associated upper-level energy will produce scattered heavy snow over parts of the Central/Southern Rockies through overnight Friday. Further, the same upper-level energy will also create rain and higher-elevation snow over parts of Central/Southern California, the Great Basin, and the Southwest from Thursday evening into Friday evening.  On Friday, as the system moves eastward, showers and thunderstorms will expand into the Ohio, Middle/Lower Mississippi, and Tennessee Valleys, along with the Southeast and Central/Southern Appalachians. The threat of excessive rainfall increases over parts of the Southeast. Therefore, the WPC has issued a Moderate Risk (level 3/4) of excessive rainfall over the Southeast from Friday into Saturday morning. The associated heavy rain will create numerous areas of flash flooding. Furthermore, many streams may flood, potentially affecting larger rivers. Additionally, showers and severe thunderstorms will develop over parts of the Southern Plains to Southeast. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Southern Plains to the Southeast from Friday into Saturday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. Additionally, there is an increased threat of hail two inches or greater over parts of the Southern Plains/Lower Mississippi Valley. Moreover, the system will produce light to moderate snow over parts of the Upper Great Lakes on Friday, extending into the Great Lakes on Saturday. Rain will develop South of the snow in parts of the Great Lakes, mainly changing over the snow by Saturday evening. On Saturday, the threat of excessive rainfall and severe thunderstorms move east into the Mid-Atlantic and Southeast. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the southern mid-Atlantic on Saturday. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable.

3m

Mar 08

Heavy snow over parts of Central Rockies Thursday night into Friday and snow over northern Maine. There is a Slight Risk of excessive rainfall over parts of Southern New England and northern Mid-Atlantic through Thursday morning. There is a Slight Risk of excessive rainfall over parts of the Lower Mississippi Valley/Southeast/Southern Appalachians on Friday. There is a Slight Risk of severe thunderstorms over parts of the Southern Plains into the Lower Mississippi Valley Thursday into Friday. A front extending southward along the East Coast moves eastward off the East Coast by Thursday evening. Moisture pooling along the front will aid in developing heavy rain over parts of the Northeast and Mid-Atlantic. Therefore, through Thursday morning, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of Southern New England/northern Mid-Atlantic. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. Rain will continue over parts of New England into the Mid-Atlantic Coast on Thursday evening. Snow will also develop over northern Maine and patches of rain/freezing rain over parts of northeastern New York State into parts of Northern New England.   Moreover, a second front extending from the Upper Midwest to Southern California will move eastward to the Great Lakes to the Southern Plains by Friday evening. The system will produce snow from the Upper Mississippi Valley to the Central High Plains and a broader region of snow over parts of the Great Basin/Southwest/Central Rockies and Northern Intermountain Region through Thursday evening. Additionally, rain will develop over parts of California through Thursday evening. Furthermore, a wave of low pressure over Southern California on Wednesday evening moves eastward to the Central/Southern Rockies by Thursday evening. The circulation around the low will aid in creating heavy snow over the Central Rockies through Friday evening. Additionally, snow will develop over parts of the higher elevations of the Southwest and Southern Rockies. By Thursday evening, the front will move into parts of the Southern Plains, producing showers and severe thunderstorms. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Southern Plains on Thursday into Friday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. On Friday, the associated front moves to the Middle Mississippi Valley into the Southern Plains. Moisture will pool along the boundary, producing heavy rain over parts of the Lower Mississippi/Tennessee Valleys, Southeast, and Southern Appalachians. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Lower Mississippi/Tennessee Valleys, Southeast, and Southern Appalachians on Friday. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. Also, on Friday, the front will create showers and severe thunderstorms over parts of the Southern Plains, Lower Mississippi Valley, and Central Gulf Coast. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Southern Plains, Lower Mississippi Valley, and Central Gulf Coast on Friday. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. Elsewhere, on Friday, an approaching front will create rain over parts of the Pacific Northwest Coast.

2m

Mar 07

Heavy snow over parts of Northern/Central Rockies. There is a Slight Risk of excessive rainfall over parts of Southern New England/northern Mid-Atlantic on Wednesday. There is a Slight Risk of severe thunderstorms over parts of the Southern Plains on Thursday. Low pressure along the northern Mid-Atlantic Coast will move northeastward into Southeast Canada by Wednesday morning. The low will develop light rain over New England through Wednesday morning. Additionally, a front extending from the Lower Great Lakes to the Southern Plains will move eastward off the East Coast by Thursday evening. Moisture pooling along the front will aid in developing showers and thunderstorms over parts of the Lower Mississippi Valley northeastward to the Lower Great Lakes through late Tuesday evening. Overnight Tuesday, the showers and thunderstorms will be over parts of the Central Gulf Coast and Southeast. The showers and thunderstorms will move off the Southeast Coast overnight Wednesday. Further, light rain will develop over parts of the Ohio Valley into parts of the Northeast by Wednesday morning. On Wednesday, the system will produce rain over parts of the Northeast and Mid-Atlantic. The rain over Southern New England/northern Mid-Atlantic will be heavy. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of Southern New England/northern Mid-Atlantic from Wednesday through Thursday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. On Thursday, rain will continue over parts of New England, with snow over northern Maine.   Moreover, a wave of low pressure along a front over the Northern/Central Rockies will produce heavy snow over parts of the area through Wednesday. The associated boundary will linger through late Wednesday afternoon, producing light snow at the higher elevations. In addition, weak onshore flow will aid in creating light rain over parts of Northern California through late Wednesday night. Overnight Tuesday, the onshore flow will move southward, producing rain over parts of Central California through early Thursday morning. Moreover, the onshore flow will move southward over Southern California, creating light rain through Thursday evening.  Furthermore, the wave of low pressure moves eastward into the Northern Plains by Wednesday morning and into Central Canada by Thursday. On Wednesday, the low will produce light to moderate snow over parts of the Northern Plains and the Upper Mississippi Valley. The associated front will move southeastward over the Central Plains into the Southern Plains by Thursday. On Thursday, the boundary will create showers and severe thunderstorms over parts of the Southern plains. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Southern Plains on Thursday. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes.

3m

Mar 06

.nother storm to bring additional heavy snows to northern California and southern Oregon. A wet weather pattern for large areas to the east of the Mississippi River. Much above average temperatures expected for much of the lower 48 to the east of the Rockies over the next few days. Record high early morning lows possible from the Lower Lakes/Ohio Valley into the Northeast. An area of low pressure off the northern California/Pacific Northwest coast will be moving slowly southeastward Tuesday and Wednesday to a position off the central to southern California coast.  This storm will be spreading additional moderate to heavy precipitation amounts into northern California and southwestern Oregon over the next two days, with the potential for additional snowfall totals of 1 to 2 feet from the southern Oregon Cascades into the northern Sierra.  While these totals will be much less than the previous more long lasting storm, travel will remain difficult and the additional heavy snows will exacerbate recovery from the first storm.   Winter storm warnings are in effect for the northern Sierra, northern California Coast Range and into southern Oregon for additional heavy snow amounts.  The good news for this area of the country is that after the next round of heavy snows, more tranquil weather is expected for the remainder of the week. A wet weather pattern is in store for large areas of the lower 48 to the east of the Mississippi River over the next few days.  This will be along and to the east of a slow moving frontal boundary stretching southwest to northeast from the Southern Plains into the Mid Mississippi Valley, Ohio Valley and into the Northeast and ahead of two areas of low pressure moving from the central Gulf coast up along the east coast.    Moisture values expected to be much above average along and to the east of this front and ahead of the two areas of low pressure moving along the east coast, supporting the potential for widespread regions of precipitation.  The heaviest rainfall totals expected from the central Gulf coast, across portions of the Southeast and Mid-Atlantic where the two areas of low pressure are expected to move across.  The lead area of low pressure will spread rains across the Mid-Atlantic Monday night and into the Northeast on Tuesday.  This will be followed by another low moving from the central Gulf coast Tuesday night, into the Southeast Wednesday and the Mid-Atlantic Wednesday night.  Rainfall totals of 1 to 2 inches possible across these regions, with isolated areas of flash flooding possible, especially in urbanized areas of the central Gulf coast.  Much above average, spring like temperatures will persist for much of the week for areas to the east of the Rockies.  Many areas will see high temperatures Tuesday and Wednesday 15 to 25+ degrees above average.  The warmest temperatures are expected across the Southern Plains into the Lower Mississippi Valley where widespread highs in the 70s and 80s are forecast. There are not expected to be any record high temperatures across these areas over the few days, however, there is potential for widespread record high morning low temperatures from the Lower Great Lakes into the Northeast where the above mentioned much above average moisture values will keep temperatures from cooling at night. Below to much below average temperatures are expected from the Northern High Plains, Northern Rockies, Pacific Northwest and northern California.  Across these regions, high temperatures are expected to be approximately 10 to 20 degrees colder than average on Tuesday and Wednesday.

2m

Mar 05

Snowy weather pattern continues in the interior mountains of northwestern U.S. and down into the Sierra Nevada as the next round of enhanced rainfall reaches northwestern California and southwestern Oregon on Tuesday. Accumulating snowfall near the Canadian border of the Northern Plains expected to taper off early on Monday. Another coastal storm is forecast to bring new round of rain up the Atlantic coast from later Monday through Tuesday as some threat of heavy rain emerges along the central Gulf Coast. Much above average, Spring-like temperatures shifting from the Plains/Midwest into the Northeast as Critical Fire Weather threat persists through tonight in the central/southern High Plains. As the main energy associated with the latest winter storm that impacted the western U.S. moves off into the northern Plains, the intensity of the snow and high winds along the Sierra Nevada as well as across the Intermountain West will gradually wane through Monday.  However, reinforcing upper-level energies arriving from the Pacific with keep the unstable cold air mass in place across a large section of the western U.S., with frequent rounds of mountain snows continuing and reaching as far east as the central Rockies through the next couple of days.  From later on Monday into Tuesday, another influx of moisture from the next Pacific frontal system is expected to bring a renewed round of enhanced rainfall from northwestern California to southwestern Oregon where some locally heavy rainfall may occur.  Some embedded thunderstorms could also reach farther north along the coast of the Pacific Northwest and northern California on Monday as added instability associated with a surface trough edges toward the coast.  The moisture will then penetrate inland, reaching into the northern Rockies as a round of moderate to locally heavy mountain snows on Tuesday. Meanwhile, an intensifying low pressure system is bringing a round of accumulating snowfall near the Canadian border of North Dakota with a wintry mix farther east across northern Minnesota on Sunday.  The precipitation will taper off later tonight as the storm moves farther away into southern Canada.  To the south and east, the recent dry spell will initially limit rainfall amounts along a wavy front trailing southwest toward a developing low pressure system over the central High Plains.  However, persistent southerly flow from the Gulf of Mexico will eventually direct moisture northward to expand an area of rain from the Midwest to the Great Lakes later on Monday into Tuesday.  Meanwhile, an upper-level disturbance will begin to interact with the returning Gulf moisture to bring an emerging threat of heavy rain into the central Gulf Coast states on Tuesday and especially by Tuesday evening. Along the East Coast, following a recent round of widespread enhanced rainfall, another coastal low pressure system is forecast to form along the stalled front and track up the Mid-Atlantic coast Monday into Tuesday.  This relatively compact system is forecast to deliver another round of enhanced rainfall up the Mid-Atlantic states Monday and Tuesday, reaching into New England by Tuesday afternoon.  Across Florida, thunderstorm chances are forecast to decrease as the lingering front weakens with time but they will increase again later on Tuesday as the aforementioned upper-level disturbance begins to approach from the west. Widespread much above average, Spring-like high temperatures will persist across the central/eastern U.S. into Monday. The greatest anomalies of 25-35 degrees over the lower/mid-Missouri Valley northeastward into the upper Great Lakes on Sunday will shift into the Ohio Valley, lower Great Lakes, and interior Northeast on Monday. 

2m

Mar 04

Winter storm continues in the West with heavy mountain snow, widespread damaging winds, and powerful blizzard conditions in the Sierra Nevada... Accumulating snowfall near the Canadian border across Montana and North Dakota with a wintry mix from North Dakota to northern Minnesota. A coastal storm with widespread rainfall will exit New England on Sunday but another coastal storm is forecast to bring another round of rain into the Mid-Atlantic coast later on Monday. Much above average, Spring-like temperatures shifting from the Plains/Midwest into the Northeast as Critical Fire Weather threat persists in the central/southern High Plains. A significant winter storm remains in progress across much of the West, including dangerous, blizzard conditions for the Sierra Nevada as an amplified upper-level trough forces its way into the western U.S. A multi-day influx of moisture from the Pacific interacting with colder air pushing southward from Canada is bringing heavy higher elevation, mountain snows across most of the ranges of the Pacific Northwest, northern/central California, the Great Basin, and the northern/central Rockies. The heaviest precipitation associated with this system will continue to impact these areas through tonight into Sunday morning. In addition, widespread wind-related advisories and warnings remain in effect across much of the greater western U.S. as wind gusts reach upwards of 55 mph, with gusts as high as 75 mph for higher elevations, leading to the risk of downed trees and power lines. The combination of snow and high winds is most intense in the Sierra Nevada into tonight, where heavy snow rates exceeding 3" per hour and winds gusting over 100 mph are causing significant blowing, drifting snow and whiteout conditions, making travel impossible through the area. Additional 2 feet of snow, on top of a few feet of recent snowfall, can be expected along the Sierra Nevada through Sunday. The most intense snow and wind should begin to wind down later on Sunday but additional energy from the Pacific will keep light to moderate precipitation in place through Monday across the northwestern U.S. through Monday, with another system forecast to reach northern California later on Monday. High temperatures will be below average this weekend with the colder airmass moving in, with highs in the teens and 20s for the Northern Rockies; 30s and 40s for the Pacific Northwest, northern California, the Great Basin, and central Rockies; 50s for central California; and 60s for southern California. Temperatures will be warmer into the Southwest with highs in the 70s. Along the East Coast, a low pressure system tracking along a coastal front up the Mid-Atlantic coast continues to bring widespread rainfall across New England into tonight.  This system is forecast to move east of Cape Cod on Sunday, gradually bringing the rain out into the Atlantic later on Sunday.  However, the trailing portion of the front is forecast to become stationary just off the coast of the southeastern U.S. where another wave of low pressure is forecast to develop.   Widespread well above average, Spring-like temperatures are forecast to continue for much of the Plains and Midwest for the remainder of the weekend into Monday. The greatest anomalies will be centered over portions of the central/northern Plains and Upper Midwest Saturday, spreading into the Great Lakes and Middle Mississippi/Ohio Valleys on Sunday, where forecast highs reaching well into the 60s and 70s are upwards of 25-35 degrees above average.

3m

Mar 03