Glacier National Park Avalanche Forecast

Issued: Nov 20th, 2021 4:00PM

Sat Nov 20th Current Conditions
Alpine Moderate Treeline Moderate Below Treeline Low
Sun Nov 21st 2 Day Outlook
Alpine Moderate Treeline Moderate Below Treeline Low
Mon Nov 22nd 3 Day Outlook
Alpine Moderate Treeline Low Below Treeline Low

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is low. Known problems include Wind Slabs.

Watch the Wind this Weekend.

Below treeline many gremlins still lurk waiting to steal your ski tips... watch out!


Weather Forecast

The Pacific storms will be passing north of us this weekend, leaving us with unsettled conditions and scattered flurries.

Tonight: trace snow, freezing level (fzl) 800m, wind SW 30-40km/h

Sunday: trace of snow. Fzl rising to 1200m. Wind SW 30km/h

Monday: 5cm of snow. Fzl 1300m. Wind SW 30km/h gusting to 55km/h.

Snowpack Summary

In the past 24hrs 10-20cm of new snow has fallen and is currently being redistributed by sustained moderate southerly winds. At treeline, this new snow covers the widespread November 15th crust; below, travel remains exceptionally poor. The November 5th crust has been found to be decomposing near the bottom 1/3rd of the snowpack.

Avalanche Summary

No new natural or human triggered avalanches have been observed or reported from the back country and highway corridors in the past 3 days. We registered the Howitzers on Thursday, firing artillery at very steep terrain in the highway corridor with little to no result.


Timing, track, or intensity of incoming weather system is uncertain


Wind Slabs

An icon showing Wind Slabs


Likely - Possible

Expected Size

1 - 2

With the increase in wind values this weekend, fresh windslabs are likely forming near ridge-crests and on cross loaded features. There is a lot of snow available for transport in the alpine and upper treeline elevations!

  • Carefully evaluate terrain features by digging and testing on adjacent, safe slopes.
  • Use caution in lee and cross-loaded terrain near ridge crests.


All aspects.


Alpine, Treeline.

Valid until: Nov 21st, 2021 4:00PM

Forecast Trend

The latest forecast danger ratings, broken down to elevation. See how an elevation is trending.