Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
107 PM EST Thu Jan 26 2023

Valid 00Z Fri Jan 27 2023 - 00Z Sun Jan 29 2023

...Effects from recent strong eastern storm to continue to wane Thursday
night into early Friday...

...Arctic air to surge south into the Northern Plains/Upper Mississippi
Valley Friday into Saturday with dangerous wind chill readings likely by
this weekend...

...Heavy snows likely through the Northern Rockies and in the lee of the
Northern Rockies from Thursday night into Saturday...

The strong storm that has affected large portions of the nation over the
past few days from the Southern Plains into New England will continue to
push northeastward away from the U.S. and across the Canadian Maritimes
Thursday afternoon into Thursday night.  The well organized area of
precipitation ahead of this low will also be pushing out of eastern New
England Thursday afternoon.  In its wake, cold west northwesterly flow off
of the Great Lakes will support lake effect snow showers in the lee of the
lakes and into the upslope of the Central to Southern Appalachians
Thursday evening/night, but should be diminishing by Friday. 

An arctic frontal boundary will begin to press southward from south
central Canada tonight and into Northern Plains to Upper Mississippi
Valley region on Friday.  This arctic front will then continue to surge
southward into the Central Plains on Saturday.  Sharply colder
temperatures expected in the wake of this front across the Northern to
Central Plains and Upper Mississippi Valley region by this weekend with
high temperatures 10 to 20 degrees below average.  This translates into
high temperatures near zero Saturday from northeastern Montana, across
North Dakota, northeast South Dakota and northwest Minnesota.  These cold
temperatures combined with windy conditions will result in dangerous wind
chills readings this weekend across these areas.

In addition to the very cold temperatures and wind chill readings expected
with this arctic front, heavy snows will also be developing Thursday night
and continuing into Saturday across the Northern Rockies and in the lee of
the Northern Rockies.  Total snowfall accumulations over the next few days
area expected to be in the 1 to 2 foot range across these areas.  A narrow
band of heavy snows may also begin to push eastward along the arctic
frontal boundary across portions of the Northern to Central Plains into
the Upper Mississippi Valley Friday night into Saturday.

Oravec

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