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FOUS11 KWBC 220653
QPFHSD

Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
253 AM EDT Tue Apr 22 2025

Valid 12Z Tue Apr 22 2025 - 12Z Fri Apr 25 2025


...Northern Rockies...
Days 2-3...

A drier stretch is expected to prevail today outside of a few high
elevation snow showers near Yellowstone before the next shortwave
slides over the northern Rockies Wednesday night into Thursday.
This feature will spread snow across southwestern MT and
northwestern WY ahead of a much deeper upper trough approaching the
West Coast by the end of D3. Broad west-southwesterly flow will
aid in overspreading Pacific moisture into the region, while also
rising snow levels to around 6,000-8,000 ft during this time frame.
Amounts will be generally light, focused on the Absarokas, Wind
River, and Bighorns, where WPC probabilities for at least 8 inches
of snow through 12Z Friday are low (20-40%) at the highest
elevations.

The probability of at least 0.10" of freezing rain across CONUS is
less than 10%.


Snell




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