Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
1035 PM EST Fri Dec 08 2023

Valid 12Z Sat Dec 09 2023 - 12Z Mon Dec 11 2023

...Excessive Rainfall and Heavy Snow for Pacific Northwest and Northern
Rockies this weekend...

...Severe Weather possible from ArkLaTex to Tennessee Valley today;
Excessive Rainfall concerns for parts of the Northeast on Sunday...

...Warm air spreads from Midwest to East Coast this weekend; cool air
shifts from Rockies to Deep South...


A low pressure system will bring heavy rainfall to the Washington/Oregon
coast tonight while heavy snow develops over the Olympics and northern
Cascades. There's a Slight Risk of Excessive Rainfall leading to Flash
Flooding for the aforementioned coastal areas where the greatest risk of
high rain rates will occur. Moderate to heavy snow will subsequently
spread into the Northern Rockies early Sunday morning.

An upper trough will amplify over the Plains and Mississippi Valley and
draw a deep column of moisture from the Gulf of Mexico. Scattered showers
and thunderstorms will develop along a cold front extending from the Gulf
Coast up to the Upper Great Lakes where the surface low pressure center
will be moving through. Some thunderstorms may turn severe from the
ArkLaTex to the Tennessee Valley today, where a few tornadoes, scattered
damaging winds and large hail will be possible. Rain and thunderstorms
will spread into the East Coast on Sunday. There's a Slight Risk of
Excessive Rainfall leading to Flash Flooding for parts of the coastal
Northeast that day.

Meanwhile, cool air will descend from the Rockies into the Southern Plains
and Mississippi Valley as high pressure builds over much of the West this
weekend. Abnormally warm air will spread into the East over the next
couple of days out ahead of the approaching cold front. Widespread low
temperature records may be tied or broken Sunday night as a result. Very
dry conditions with gusty winds will support Elevated Fire Weather Risk
over parts of the Southern High Plains and Southern California today.


Kebede


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