Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
300 PM EST Wed Dec 06 2023

Valid 00Z Thu Dec 07 2023 - 00Z Sat Dec 09 2023

...Excessive rainfall and flooding potential continues across the Pacific
Northwest into Thursday morning...

...Moderate upslope snow forecast across the central and southern
Appalachians through Wednesday night...

...Well above average and potentially record-breaking warmth forecast
across the central United States over the next few days...

Several inches of rain has fallen over multiple days across the Pacific
Northwest which has resulted in scattered areas of flooding. This water
logged area will see some relief as precipitation weakens and reduces
coverage by the week's end. WPC is maintaining a Marginal Risk for
excessive rainfall for the Pacific Northwest/northern California Coast and
northern Idaho/northwest Washington through Thursday morning.
Additionally, numerous flood Watches, Warnings, and Advisories remain in
effect. With colder air filtrating into the region snow levels are
expected to drop to around 4000 feet which will reduce to negate
snowmelt/runoff potential from areas of higher terrain as the next wave of
moderate precipitation enters the region.

With cold air surging into the eastern U.S. with a developing low pressure
system in the western Atlantic snow showers and light accumulations are
possible for the Appalachians, Great Lakes, and Northeast through
Thursday. Some of the greatest accumulations may be observed along the
higher terrain of the central and southern Appalachians through the
overnight hours. Winter Weather Advisories extend from the mountainous
terrain of western North Carolina to the Allegheny Front of West Virginia
and western Maryland for 3 to 6 inches of snow.

Meanwhile a vast portion of the central U.S. will be warmer and drier
through Friday before a low pressure system and associated cold front
advances through the Great Plains. Daily maximums will climb into the 60s
across South Dakota with 70s across Kansas. These values are around 20 to
30 degrees above average when compared to early December climatology. The
warmest day will be Thursday, where several daily high temperature records
could be broken throughout the Great Plains and Upper Midwest. Meanwhile,
as the aforementioned cold front swings through the Rockies on Thursday
and approaches the Plains on Friday, unsettled weather and gusty winds are
set to return. Moderate to locally heavy snow is possible across the
mountainous terrain of the Rockies, as well as into the central High
Plains on Friday. Strong westerly and downsloping winds may also prove to
be hazardous across the northern and central High Plains for the end of
the week.

Campbell


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