Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
325 PM EST Thu Feb 25 2021

Valid 00Z Fri Feb 26 2021 - 00Z Mon Mar 01 2021


...Pacific Northwest to the Northern Rockies...
Days 1-2...
Strong northwesterly flow, with embedded shortwave energy aloft,
will continue to support periods of heavy snow across the
Northwest into the northern Rockies through Friday and into early
Saturday.  Through late Saturday, widespread additional
accumulations of 8-12 inches are likely across the Olympics, the
Washington and Oregon Cascades, the Blue Mountains, as well as the
Rockies from northern Idaho and western Montana to eastern Idaho
and western Wyoming.  Within these areas, local accumulations of
2-feet or more are likely across the higher elevations of the
Cascades, the Blue Mountains and the Bitterroot Range.  Drier
weather is expected by late Saturday and continuing into Sunday as
a strong ridge shifts east across the region.

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

Pereira