Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
420 AM EDT Fri Sep 30 2022

Valid 12Z Fri Sep 30 2022 - 12Z Mon Oct 03 2022

...North-Central Rockies...

Days 1-2...

An upper low over Idaho will shift SSE to near the border of
ID/UT/WY today where it will stall through Saturday before lifting
to the northern Plains Sunday/Monday. Upper level divergence and
upslope enhancement from a lee-side trough will allow a focus of
Pacific and Gulf of Mexico sourced moisture and promote mainly
moderate precip through Saturday night over the western WY and
southern MT ranges. Snow levels over these mountains will drop
today under falling heights to 9000-9500ft above which there is a
risk for 12 inches of snow, especially in the highest terrain of
the MT/WY Absarokas and Wind Rivers.


For days 1-3, no icing is forecast.

Jackson