FOUS11 KWBC 230703
QPFHSD

Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
303 AM EDT Wed Oct 23 2024

Valid 12Z Wed Oct 23 2024 - 12Z Sat Oct 26 2024

...Northern Rockies...
Day 1...

Mid-level low off the WA/OR coast opens into compact shortwave
and ejects east over the OR Coast this afternoon before weakening
as it reaches western WY late tonight. Lee-side low pressure
develops over northern WY overnight which aids upslope flow back on
the western WY terrain where snow reaches moderate rates overnight.
Snow levels drop from around 8000ft to 7000ft overnight during this
precip, particularly around greater Yellowstone. Day 1 PWPF are
10-40% for >4" over the northern Absarokas in southern MT and in
the Tetons.


The probability of significant ice across the CONUS is less than
10 percent.


Jackson


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