Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
158 PM EST Fri Dec 30 2022

Valid 00Z Sat Dec 31 2022 - 00Z Mon Jan 02 2023

...Much above average temperatures expected across much of the central to
eastern U.S. as 2022 ends and 2023 begins...

...Wet weather pattern to continue across large portions of the West coast
with Flash Flooding possible through large portions of California...

...The New Year will ring in wet from Southern California, through
Southern Nevada into Northern Utah and from New York City into New
England...

Arctic air will remain absent from the Lower 48 as 2022 ends and 2023
begins with a progressive, generally west to east, mid to upper level flow
pattern expected across the U.S.   This pattern will continue to support
much above average temperatures for the central to eastern U.S. along 
with numerous record high minimum temperatures possible Friday morning
across Southern California, Southern Nevada and portions of the east. 
Additional numerous record high minimum temperatures possible New Year's
morning across much of the Northeast from Washington D.C. into Boston and
over the Southwest.  In addition to the much above average temperatures,
New Year's Eve may be wet from Southern California, northeast into
southern Nevada and northern Utah and from New York City to Boston.

The recent wet weather pattern for large portions of the West coast will
continue over the next several days. The next in the series of heavy
precipitation events to affect the west coast will be sinking south Friday
night from northern California and the Great Basin, into central
California and the Sierra on Saturday and into Southern California and
portions of the Southwest by New Year's day.  High snow elevations will
result in a greater than average amount of the heavy precipitation in the
Sierra falling as rain, increasing the potential for flash flooding in the
interior California Valleys.  Flash flooding also possible across much of
the California coastal regions, especially over any recent burn scar
areas.  These rains will, however, be very beneficial to areas of
California and Nevada that remain in long term Severe to Exceptional
drought.

Heavy rains are also possible Thursday afternoon into Thursday evening
across the Gulf Coast from southern Mississippi across the Florida
Panhandle.  This heavy rain threat is expected to diminish by or shortly
after midnight Saturday, but an overall showery wet pattern will continue
Saturday across the eastern third of the country.

Happy New Year!


Oravec

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