Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
423 AM EDT Thu Sep 29 2022

Valid 12Z Thu Sep 29 2022 - 12Z Sun Oct 02 2022

...North-Central Rockies...

Days 2/3...

An upper low currently over the Pacific Northwest coast
strengthens as it tracks across the northern Rockies through
Thursday before stalling over the north-central Rockies near the
Idaho/Wyoming border Friday and Saturday. A lee side trough over
the northern High Plains helps shift Gulf of Mexico-sourced
moisture west to the north-central Rockies while an axis from the
Southwest brings Pacific/Gulf of California moisture up to the
north-central Rockies with locally moderate precipitations. Snow
levels drop to around 9000ft tonight and linger there through the
weekend. The best precip chances are Friday into Saturday with
long duration snow potential for the highest sections of the
Absarokas in Montana and Wyoming and the Wind River Range where
6-8" are possible through Days 2 and 3.


For days 1-3, no icing is forecast.

Jackson