Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
308 AM EST Fri Jan 20 2023

Valid 12Z Fri Jan 20 2023 - 12Z Sun Jan 22 2023


...Snow and a wintry mix expected for portions of Upstate New York and New
England into Friday morning...

...Heavy snow possible for portions of the High Plains late Friday and
Saturday...

...Frost and freezing temperatures likely for parts of Northern and
Central California...

The period of heavy snow across the Upper Great Lakes will come to an end
today as the the associated area of low pressure departs offshore.
Accumulating ice and/or a few inches of snow are expected to result in
hazardous travel conditions across portions of Upstate New York and
central to northern New England linger into the morning hours.  A second
low developing along the Northeast coast will likely bring several inches
of snow to portions of southern New Hampshire and southwestern Maine.

An upper level low is expected to develop and track from the Great Basin
into the Four Corners regions; which will usher in a colder airmass and
additional snow across southern Utah, northern Arizona and into the
Southern Rockies today. It will continue to track east of the Front Range
while spreading snow to the High Plains by late tonight and lingering into
Saturday. Meanwhile areas of heavy snow are expected to develop north and
west of the associated surface low as it tracks east of the Rockies
through the High Plains. Accumulations of several inches of snow will be
possible from far northeastern New Mexico to western Kansas. Along with
the snow will be gusty winds that will cause blowing and drifting of snow
that will lead to reduced visibilities that will contribute to hazardous
travel conditions across portions of the region.

For the western states below average temperatures and dry conditions will
prevail through the end of the week, especially for California. Freeze
Warnings remain in effect for this morning and again tonight through
Saturday morning for the interior portions of the San Francisco Bay Area
and the Central Coast.  A Freeze Warning is also in effect for the
northwest portions of the San Joaquin Valley tonight, with a Watch
covering a larger portion of the Valley for Friday night. Precautions
should be made to protect people, pets and livestock, sensitive plants,
and exposed plumbing from these hazardous temperatures. 

Campbell/Pereira

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