Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
327 PM EST Sun Nov 20 2022

Valid 00Z Mon Nov 21 2022 - 00Z Thu Nov 24 2022

...New York...
Day 1...
Last of the lingering lake effect snow band off Lake Ontario near
Oswego will diminish overnight with several more inches of snow,
but confined to a small area just southeast of the lake.


...Washington...
Days 2-3...
Pacific shortwave will zip through WA/BC Tuesday with a brief and
waning plume of moisture ahead of a cold front. Snow levels will
be around 5000-6000ft with moderately high probabilities for 6 or
more inches for the north WA Cascades. On Wednesday, the system
will continue ESE across ID into WY but with decreased moisture.
Still, WPC probabilities of at least 4 inches of snow are moderate
(>40%) over the Idaho panhandle and far western MT ranges
especially where southerly to SSW flow maximizes upslope
enhancement.

The probability of significant icing greater than 0.25" is less
than 10 percent.

Fracasso