Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
300 AM EST Wed Nov 22 2023

Valid 12Z Wed Nov 22 2023 - 12Z Fri Nov 24 2023

...Widespread rainfall and locally heavy rain along the East Coast are
expected to taper off by this evening...

...Accumulating snow today across northern New England and especially over
northern Maine...

...A white Thanksgiving is on tap for northern and central Rockies as
arctic air intrudes the northern tier of the country on Thanksgiving Day
into Friday...

A low pressure complex that had brought a round of soaking rain across
much of the eastern U.S. on Tuesday is in the process of moving off the
East Coast early this morning.  However, the Carolinas and New England
will likely see precipitation lingering longer today as rain tapers off in
other areas along the East Coast.  Cold air trapped in New England will
support snow today as the center of a low pressure system passes just to
the south.  Up to 8 inches of snow is forecast for portions of northern
Maine.  By Thanksgiving morning, the low pressure system will largely move
off the East Coast, bringing clearing skies just in time for Thanksgiving
festivities.  Nevertheless, much of the Northeast will likely contend with
blustery conditions as the storm is forecast to deepen quite rapidly just
off to the east.  Some snow showers are forecast to resume over interior
New England by Thanksgiving evening as an arctic front approaches from the
west.

Meanwhile, a snow event is brewing over the northern Rockies.  Rain
associated with a frontal system currently moving onshore into the Pacific
Northwest is forecast to merge with a surge of arctic air down the
Canadian high plains.  The result of this interaction will be a developing
and expanding area of snow commencing today over Idaho to western Montana,
then spreading southeastward into much of Wyoming and portions of the
Great Basin on Thanksgiving Day.  By Thanksgiving evening into Friday
morning, much of Colorado and Utah as well as nearby central High Plains
will likely see snow picking up in intensity, along with increasingly
strong and gusty winds from the north.  Portions of Wyoming could see a
foot of snow on the ground by Friday evening.

Temperatures are expected to be much above average across the northern
U.S. into Wednesday, followed by much colder temperatures and the above
mentioned snow threat for Thanksgiving Day. This colder than average air
will continue to sink southward at the end of the week into this weekend
across the central Rockies and into the central to southern Plains. 
Cooler than average temperatures also likely across the southeast quarter
of the nation on Thanksgiving, with these cooler than average temperatures
then taking hold across much of the nation by this weekend, save for the
immediate West coast and South Florida. 

Have a safe and happy Thanksgiving!

Kong/Oravec


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