Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
255 AM EST Tue Nov 14 2023

Valid 12Z Tue Nov 14 2023 - 12Z Fri Nov 17 2023


...Northern Rockies...
Day 2...
Models continue to show an amplifying trough and associated front
dropping into the northern Rockies Wednesday into early Thursday. 
The overall anticipated snow accumulations and probabilities for
impactful snow along area passes have continued to increase with
the latest models runs, especially in the Glacier National Park
region.  WPC guidance indicates a High Risk for accumulations of 4
inches or more covering much of this region, including Marias
Pass, and Moderate Risk for accumulations of 8 inches or more
across some of the higher terrain.  The coverage of heavy
accumulations is expected to be less farther east along the
northern Montana and Idaho border, however snowfall accumulations
of at least an inch or two appear likely on area mountain passes,
including Lookout and Lolo Pass.

Pereira