Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
211 PM EST Wed Jan 25 2023

Valid 00Z Thu Jan 26 2023 - 00Z Sat Jan 28 2023

...Impactful storm affecting the Northeast U.S., southward along the east
coast Wednesday night into early Thursday...

...Active Lake effect snows downwind of the Great Lakes on Thursday and
again late Friday across the Upper Lakes...

...Arctic air to surge south into the Northern Plains/Upper Mississippi
Valley on Friday...


The strong storm that has produced a broad band of heavy snow from
portions of the Southern Plain, into the Middle Mississippi Valley and Mid
West region  over the past 24 hours will continue to press northeastward
Wednesday evening into Thursday from the eastern Great Lakes and across
New England.  Heavy snows are possible ahead of this storm across portions
of the eastern Great Lakes, northern New York State into Northern New
England where winter storm warnings and winter weather advisories are
currently in effect.  To the south of the snow areas, heavy rains are
expected to push across the coastal Mid-Atlantic into southeast New
England from this evening into the early hours of Thursday,  including the
New York City to Boston urban corridor.  These rains may produce isolated
runoff issues, especially in more urbanized regions.  Farther south along
the east coast, rains will come to an end by midnight as a strong cold
front pushes offshore.  This front will be pressing southward through
Florida Wednesday night, bringing much cooler temperatures for Thursday
and Friday,replacing summer like readings in the 80s with below average
temperatures.  In the wake of the strong northeast storm  pulling away
from New England on Thursday, west northwesterly flow across the Great
Lakes will support active lake effect snow showers downwind of all of the
Great Lakes into the upslope of the Central to Southern Appalachians, with
locally heavy snowfall accumulations likely.

Much of the remainder of the nation will be fairly tranquil weather wise
on Thursday. Some light snows are possible, however, from the Northern
Rockies into the Northern Plains on Thursday. An arctic frontal boundary
is expected to sink southward on Friday across the north central portions
of the nation, bringing much below average temperatures for the Northern
Plains into the Upper Mississippi Valley by the end of the week into this
weekend.  This arctic front will also support the potential for heavy
snows across the Northern Rockies through much of Friday.  Lake effect
snows also likely to begin late in the day on Friday downwind of the Upper
Great Lakes as the arctic front sweeps eastward through the Great Lakes
region on Friday.

Oravec

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