466
FXUS01 KWBC 250826
PMDSPD

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
300 AM EST Tue Nov 25 2025

Valid 12Z Tue Nov 25 2025 - 12Z Thu Nov 27 2025

...Rain changing to locally heavy snow under blustery and windy
conditions expected to spread from west to east across the
northern tier states for the next couple of days...

...Flash flood and severe weather threats moving through the Deep
South early today before reaching the interior Southeast tonight...

...Well above average temperatures across much of the
central/eastern U.S. will give way to much colder and windy
conditions heading into Thanksgiving Day...

A deepening upper-level trough interacting with an invasion of
polar air from western Canada will send a clipper type
low-pressure system from west to east across the northern tier
states for the next couple of days.  This clipper is forecast to
intensify and expand in size as it gradually engulfs another low
pressure/frontal system which is bringing heavy rain and severe
thunderstorms across the Deep South today.  A cold rain is
expected to fall across the northern Plains today prior to the
arrival of this clipper system.  Falling temperatures with rain
changing to moderate to locally heavy snow together with strong
and very gusty westerly winds will signal the passage of the
system center.  By tonight, the clipper is forecast to intensify
further, bringing with it rain and possibly embedded thunderstorms
into the upper Midwest ahead of a cold front.  Areas just north of
the track of the system center will see rain changing to locally
heavy snow with very gusty winds.  By Wednesday, the entire system
will intensify and expand further, and will begin to engulf the
other frontal and low pressure system farther to the south.
Moderate to heavy snow will overspread the upper Great Lakes on
Wednesday while rain across the remainder of the Great Lakes will
change over to snow from west to east from Wednesday night into
Thanksgiving morning on the back side of the continually expanding
low pressure system.  Snowfall amounts will progressively increase
from west to east across the northern Plains with highest totals
of over a foot likely downwind from the Snow Belt of Lake Superior.

Farther south, the other frontal system with a weak low pressure
center will continue to ingest moisture from the Gulf and dump
heavy rain with some severe thunderstorms this morning from west
to east across the Deep South into the Tennessee Valley.  As the
the system advances toward the East Coast, a period of enhanced
rainfall can be expected to move through the central Appalachians
later today followed by the interior Mid-Atlantic this evening.
The rain will then move across New England through tonight.
Meanwhile, showers and thunderstorms will be moving through the
remainder of the East Coast and the Southeast through Wednesday
afternoon associated with the trailing cold front.  The polar air
will engulf much of the central and eastern U.S. by Thanksgiving
morning behind the cold front as the huge circulation of the low
pressure system begins to exit into southeastern Canada.

Much of the central and eastern U.S. will be milder than normal
before the arrival of the polar air mass.  Meanwhile, the western
U.S. will generally be milder than normal following a brief cool
down across the Northwest.  Moisture from the next system is
scheduled to reach the Pacific Northwest today with a good dose of
rain into tonight for the lower elevations while snow will engulf
the Cascades, then reaching into the northern Rockies overnight
into Wednesday morning.  Another system in its wake will begin to
spread rain from northern Oregon on Wednesday and into much of
Oregon by Thanksgiving morning with wet snow along the Cascades.

Kong


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

$$