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.