Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
318 AM EDT Wed Oct 19 2022

Valid 12Z Wed Oct 19 2022 - 12Z Sat Oct 22 2022

Days 1-2...

The probability of snow accumulations 4 inches or greater is less
than 10 percent.

The probability of significant icing is less than 10 percent.

Days 3...
...Pacific Northwest...
Friday into the weekend is expected to mark the return of
widespread significant precipitation to the Northwest as a
amplifying trough moves across the region.  Guidance shows an
amplifying shortwave diving southeast from the Gulf of Alaska
toward the Pacific Northwest on Friday, before moving inland
Friday night-early Saturday.  Warm advection precipitation is
forecast to spread into the region on Friday ahead of a
well-defined cold front that is forecast to push southeast across
the region Friday evening and through the overnight.  With the
frontal passage, snow levels are forecast to drop Friday night. 
While the threat for heavy snow accumulations through Saturday
morning will likely remain confined to elevations above 5000 ft,
WPC PWPF shows some significant probabilities for at least some
accumulation in the northern Cascade passes.

The probability of significant icing is less than 10 percent.

Pereira