Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
311 AM EST Sat Jan 22 2022

Valid 12Z Sat Jan 22 2022 - 12Z Mon Jan 24 2022

...Wintry precipitation along the Mid-Atlantic coast expected to come to
an end later this morning...

...Periods of light snow from the northern Plains to the Great Lakes...

...Santa Ana winds across portions of California followed by return of
Gulf moisture into southern Texas...

...Arctic chill continues across much of the southern and eastern U.S. but
mild weather returns to the northern/central High Plains....

The latest round of freezing rain and snow impacting the Carolinas,
southeastern Virginia and into the Delmarva Peninsula is expected to exit
the coast later this morning as the low pressure system begins to move
more rapidly out into the Atlantic.  An arctic air mass behind this system
will keep much of the southern and eastern U.S. much colder than normal. 
A gradual moderating trend is expected for the next couple of days as the
arctic high pressure system weakens.

The northern tier states will be in the cross-path of low pressure systems
that are forecast to dive southeastward from Alberta, Canada during the
next couple of days.  These clippers will bring periods of snow followed
by reinforcing shots of arctic air into the northern Plains toward the
Great Lakes region.  In contrast, mild temperatures are expected to return
over the northern and central High Plains just ahead of the arctic
boundaries.

Farther west, an upper low in the Desert Southwest will generate unsettled
weather for the Four Corners region while Santa Ana Winds race through
southern California. High Wind Warnings have been posted just north and
east of Los Angeles, the central Sierra Nevada, and the coastal ranges
north of San Francisco. An even larger footprint of Wind Advisories is in
effect through Saturday morning from central California to the southern
Great Basin. The upper low is forecast to produce light snowfall
accumulations from the highest peaks of southern California to the
Mogollon Rim of Arizona and the southern Rockies tonight through Saturday.
This upper low will inch east on Sunday with only a few spotty showers and
some light snowfall accumulations in the higher elevations of eastern
Arizona and western New Mexico.  By Sunday night, the upper low/trough is
expected to cross northern Mexico.  Ahead of the upper system, moisture
from the western Gulf of Mexico is forecast to return across southern
Texas Sunday night with thunderstorms possible by Monday morning as a low
pressure wave is forecast to develop near the southern tip of Texas.

Kong/Mullinax


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