Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
259 PM EST Sun Jan 19 2020

Valid 00Z Mon Jan 20 2020 - 00Z Wed Jan 22 2020

...Winter in control of the Eastern U.S. with well below normal
temperatures and mostly dry conditions through Tuesday...

...Storm system to usher in rain and mountain snow to the Northwest early
week...

As the weekend winter storm tracks east into the northwest Atlantic, drier
conditions and cold temperatures will engulf much of the eastern U.S.
tonight and continue through the first half of the week. Frigid daily low
temperatures that dip below zero will be common across the Northern Plains
and Midwest Monday morning. By Tuesday and Wednesday, some of the more
anomalously cold conditions will be centered in the Southeast where
sub-freezing temperatures will extend as far south as north-central
Florida. On average, much of the eastern half of the country will see
temperatures anomalies range between 10 to 20 degrees below normal. Look
for lake effect snow showers to persist overnight and into Monday morning.

The first in a pair of low pressure systems will approach the Northwest
resulting in light rain and some higher elevation snow in the Cascades on
Monday. As this system dissipates offshore tomorrow, a second but more
potent storm will send a large plume of moisture will reach the West Coast
late Monday into Tuesday. Periods of rain will be common in the lower
elevations of the Pacific Northwest and northern California while mountain
snow falls across the Cascades and northern Sierra Nevada. This storm will
work in tandem with a separate storm system west of Mexico to usher in
Pacific moisture across the Southwest and the Rockies on Tuesday, leading
to scattered showers and some mountain snow in the regions. 

Mullinax

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