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
system's 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 nation's 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.