Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
320 PM EST Tue Jan 28 2020

Valid 00Z Wed Jan 29 2020 - 00Z Sat Feb 01 2020


Days 1-3...

...Western U.S....
A shortwave trough digging southeast from the Pacific Northwest
Tuesday evening, into the Southwest on Wednesday, is expected to
produce widespread, but generally light precipitation from the
Pacific Northwest to the Rockies and Southwest.  While widespread
heavy snow accumulations are not expected, some locally heavy
amounts are possible, including along the northern Cascades.  An
upstream system is expected to bring another round of generally
light precipitation across the Northwest, northern Rockies and
High Plains late Wednesday and Thursday.  As with the previous
system, widespread heavy amounts are not expected.  A warm front
lifting north along the Washington coast Thursday evening will
bring another round of organized heavier amounts to western
Washington.  However, with snow levels on the rise, heavy
accumulations will be mainly confined to the higher elevations of
the northern Cascades.

For Days 1-3, the probability of significant icing (0.25-inch or
greater) is less than 10 percent.

Pereira