Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
322 PM EDT Fri May 03 2019

Valid 00Z Sat May 04 2019 - 00Z Tue May 07 2019


Day 1...

The probability of significant icing and/or snow is less than 10
percent.

Days 2-3...

...Northern Rockies...

A frontal boundary banked along the high terrain in addition to
mid level energy embedded within northwest flow will support
periods of snow across the high terrain.  Greatest potential for
significant accumulations centers over the Glacier National Park
region, with WPC guidance indicating a Moderate Risk for
accumulations of 4-inches or more for portions of the Lewis Range
on both Days 1 and 2.

The probability of significant icing is less than 10 percent.

Pereira