220
FXUS01 KWBC 070801
PMDSPD

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
301 AM EST Sun Dec 07 2025

Valid 12Z Sun Dec 07 2025 - 12Z Tue Dec 09 2025

...Prolonged atmospheric river brings heavy rain and snow to the
Pacific Northwest beginning tomorrow...

As the weekend comes to a close, a series of atmospheric rivers
set to impact the Pacific Northwest should dominate weather
headlines for the next few days. An initial wave of moderate
rainfall is forecast to impact coastal Washington and Oregon today
along a weakening frontal system. While this first bout of
rainfall will be fairly benign, it will serve to saturate soils
ahead of a prolonged round of heavy rainfall which begins tomorrow
morning. As such, the latest Excessive Rainfall forecast depicts a
Slight Risk over the Pacific Northwest on Monday, where scattered
instances of flooding are possible. Heavy rainfall is expected to
continue through midweek as atmospheric river conditions continue,
so stay tuned as subsequent forecast days fall into the short
range. Rainfall aside, the impending atmospheric rivers should
lead to high elevation snowfall in the Cascades and Northern
Rockies, where snowfall could eclipse a foot above 6000-7000 feet.

For the rest of the Lower 48, fairly benign weather should persist
as transitory cold and dry high pressure migrates across across
the Central and Eastern U.S. Locally heavy rainfall is possible in
northern Florida today ahead of a returning polar front, although
this will be largely beneficial with much of the region in drought
conditions. As the aforementioned high pressure migrates eastward,
portions of the Plains will drastically warm up over the next
several days too, leading to high temperatures in the 50`s and
60`s in the Heartland by Tuesday (roughly 20 degrees above
average).

Asherman


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

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