659
FXUS01 KWBC 060800
PMDSPD

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
300 AM EST Sat Dec 06 2025

Valid 12Z Sat Dec 06 2025 - 12Z Mon Dec 08 2025

...Active winter weather pattern continues with snow expected
across the Northern Tier this weekend...

...Series of atmospheric rivers to usher in heavy rainfall to the
Pacific Northwest late this weekend...

Winter weather continues to make headline across multiple regions
of the Lower 48 this weekend. Through the afternoon, Winter Storm
conditions are expected to persist across portions of the Northern
Rockies as a wave of low pressure develops along an Arctic front,
with an additional foot plus of snowfall possible in higher
terrain areas. By tonight, the surface low is forecast to migrate
eastward from the Rockies, which will lead to increasing snowfall
coverage in parts of the Northern Plains and Upper Midwest. As
such, the current Watch-Warning map shows a swath of Winter
Weather Advisories and an embedded Winter Storm Warning extending
from South Dakota into northwest Illinois for 4-6" (locally
higher) of snow through Sunday.

Meanwhile, the unsettled pattern in the Pacific Northwest could
take a turn for the worse as a series of Pacific storm systems
increases the heavy rain and flood threat on Monday. Scattered
flash flooding is possible across portions of western Washington
and Oregon beginning Monday as persistent rainfall in the region
saturates soils, in turn converting any additional rain to runoff
very quickly. The current WPC outlook highlights a Slight Risk of
Excessive Rainfall for the region on Monday, and a Flood Watch is
in effect for the area beginning Sunday night. Stay tuned for
updates to the forecast as the heavy rainfall threat looks to
carry on into at least midweek. Elsewhere across the Continental
U.S., dry conditions are expected to continue from California to
the Southern Plains, and extending eastward to the Mid-South and
Tennessee Valley. Across the Gulf Coast region, a lingering
frontal boundary off the coast will keep rainfall chances elevated
through early Sunday from southeast Louisiana to the Florida
Peninsula to southern South Carolina, with some 1 inch totals
possible in some areas. In terms of temperatures, it will be quite
cold from the Northern Plains to the Northeast with a big dip in
the jet stream and multiple cold frontal passages heralding the
arrival of a polar airmass. Some subzero overnight lows are likely
across portions of the Dakotas and into Minnesota, especially by
Sunday/Monday morning in the wake of the next arctic front.

Asherman/Kebede


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

$$