Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
328 PM EST Mon Jan 17 2022

Valid 00Z Tue Jan 18 2022 - 00Z Thu Jan 20 2022

...Major winter storm begins to exit the Northeast; blustery conditions
continue into Tuesday with lake-effect snows...

...Snow spreading across the upper Midwest to the Great Lakes on Tuesday
ahead of an Alberta clipper...

...Snow spreading into the northern Rockies/High Plains on Tuesday
followed by arctic air intrusion down the Plains on Wednesday...

A deep low pressure system responsible for the most recent winter storm in
the eastern U.S. and severe weather in Florida is forecast to move farther
into southeastern Canada on Tuesday.  The remaining heavy snow in northern
Maine is expected to taper off and change over to mixed precipitation or
wet snow by this evening.  Much of the rest of the interior Northeast will
see the snow becoming more scattered tonight.  Other than the tendency for
lake-effect snows to linger downwind of the lower Great Lakes, the snow
across the Northeast should gradually taper off on Tuesday.  However, due
to the size of the departing storm, blustery conditions are expected to
continue into Tuesday for much of the Northeast.

Meanwhile, a cold front across southern Canada will dip toward the
northern Plains.  An Alberta clipper forming along the front is forecast
to move toward the Great Lakes on Tuesday.  Lingering snow across the
Great Lakes will pick up in intensity on Tuesday as the clipper
approaches, with accumulating snow expected across northern Minnesota and
northeastern North Dakota.  Arctic air behind the cold front will then
surge into the northern Plains on Tuesday.  Upslope snow is forecast to
develop and intensify over the northern High Plains into the northern
Rockies on Tuesday as an arctic high pressure system slides down from
western Canada.  This arctic plunge will bring sub-zero temperatures into
the northern Plains on Wednesday.  By Wednesday, rain is forecast to
blossom across the Deep South to Tennessee ahead of a developing low
pressure system.  The rain will begin to spread into the Appalachians
later that day as showers and thunderstorms are expected to develop near
the western Gulf Coast region ahead of the arctic cold front.  Meanwhile,
some snow will move across the lower Great Lakes toward northern New
England ahead of the clipper system.  Snow is also in the forecast across
the central High Plains on Wednesday.

Weak onshore flow will produce light rain over parts of the Pacific
Northwest and some snow at the higher elevations which will continue
through Wednesday as the next warm front approaches from the Pacific. 
Farther south, a lingering upper-level low off Baja California will bring
some light precipitation from southern California through the Desert
Southwest and into the southern Rockies during the next couple of days.

On another note, warm temperatures, gusty winds, and dry fuels will
promote fire weather threat for parts of the southern High Plains prior to
the arrival of the arctic front.

Kong

Graphics are available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php