220
FXUS01 KWBC 100801
PMDSPD

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
300 AM EST Wed Dec 10 2025

Valid 12Z Wed Dec 10 2025 - 12Z Fri Dec 12 2025

...Atmospheric river and heavy rain continue across the Pacific
Northwest and Northern Rockies with snow for higher mountain
elevations...

...A strong clipper system will bring the threat of heavy snow and
high winds across the interior Northeast and Appalachians...

A strong clipper system located over the Upper Midwest is forecast
to pivot into the interior Northeast today, ushering wintry
weather and gusty winds into the region as it does so. Winter
weather-related Advisories and Warnings have been posted for
snowfall amounts of 4-6" over portions of the Interior Northeast
and Appalachians. Of particular note is a stretch of Blizzard
Warnings which have been issued for the Central Applachains
through tomorrow where 50 mph wind gusts will overlap with 3-6" of
snowfall. Elsewhere, favored areas in the Tug Hill and western
Adirondacks can expect storm total snowfall amounts of 8 to 16"
through Thursday. As we look ahead to the end of the work week,
yet another clipper will follow on the heels of this system,
bringing with it the chance for freezing rain and heavy snow from
the Northern High Plains into the Ohio Valley. In advance of this
upcoming system, a handful of Winter Storm Watches are posted for
eastern Montana.

Meanwhile, a prolonged atmospheric river continues to produce
heavy rain in the Pacific Northwest and lower elevations of the
northern Rockies. Slight Risks of Excessive Rainfall (level 2/4)
are in effect for the Pacific Northwest today and tomorrow, and
for a portion of the northern Rockies along the Idaho/Montana
border tomorrow and Thursday. The prolonged rainfall, with totals
of several inches possible, will bring the threat of some
scattered flooding, with the warm, tropical origin of the moisture
leading to very high snow levels and thus the inclusion of lower
elevations within the northern Rockies. Snowmelt may also
contribute to flooding especially along area rivers. Snow levels
will generally range between 7000-8000 feet, with locally heavy
accumulations possible for both the northern Cascades and areal
ranges of the northern Rockies.

A familiar pattern featuring mean upper-troughing over the central
to eastern U.S. and mean upper-ridging over the central to western
U.S. will continue to keep temperatures at or below average to the
east and above to well above average to the west. Conditions will
fluctuate a bit daily depending on the timing of frontal passages,
but forecast highs the next couple of days will generally be in
the teens and 20s for the Northern Plains/Great Lakes, the 20s and
30s for the Midwest east through the Ohio Valley and into New
England, the 40s and 50s for the Mid-Atlantic and into the
Southeast, and 60s and some 70s along the Gulf Coast and into
Florida. Yet another intrusion of frigid Arctic air into the
Northern Plains will translate to high temperatures which struggle
to break into the teens on Friday. The above to well above average
conditions begin across the central/southern Plains with highs in
the 50s/60s further north and 60s and 70s to the south. In the
West, highs will be in the 50s for the Pacific Northwest and the
interior West, 60s and 70s for central to southern California, and
70s and 80s for the Desert Southwest.

Asherman/Putnam


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

$$