Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
311 PM EDT Mon Apr 21 2025

Valid 00Z Tue Apr 22 2025 - 00Z Fri Apr 25 2025


...Northern Rockies...
Days 1-3...

Weak and broad troughing over the northwestern CONUS will yield
generally light snow to the high terrain of northwestern MT this
evening before tapering off. Drier conditions will prevail over
much of the region Tuesday ahead of a shortwave moving through
Oregon Wednesday. This feature will move into the northern Rockies
thereafter, spreading snow across southwestern MT and northwestern
WY starting Wednesday morning. Amounts will be light, focused on
the Absarokas, Wind River, and Bighorns where WPC probabilities for
at least 8 inches of snow through the period (especially days 2-3)
are moderate (40-70%) at the highest elevations.

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


Fracasso