Glacier National Park Avalanche Forecast

Issued: Nov 22nd, 2021 4:00PM

Mon Nov 22nd Current Conditions
Alpine Moderate Treeline Moderate Below Treeline Low
Tue Nov 23rd 2 Day Outlook
Alpine Moderate Treeline Low Below Treeline Low
Wed Nov 24th 3 Day Outlook
Alpine Considerable Treeline Moderate 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.

Wind slabs have likely formed in the alpine, evaluate steep terrain and convex areas with caution.

Travel below ~1700m is teeth chattering and rugged due to a breakable crust and refrozen chunks of snow, take your time moving through this terrain.

Summary

Weather Forecast

5cm of snow Monday night and isolated flurries over the day on Tuesday with mainly cloudy skies. Winds will drop to 10-30km/hr from the South West as the freezing level rises to 1300m. Temps in the alpine could reach a high of -6.

Later in the week a moist system moves inland and could deliver another 25-40cm by the weekend.

Snowpack Summary

Up to 35cm of snow has fallen over the last few days and has been redistributed by 25-40km/hr Southerly winds. At tree line the new snow covers the widespread November 15th crust. Below ~1700m a breakable crust and refrozen snow/ice chunks make for poor travel. The November 5th crust is decomposing near the bottom 1/3rd of the snowpack.

Avalanche Summary

Several natural slab avalanches, size 1.5-2.0, out of steep, wind loaded terrain today, typically stopping halfway down the track or at the top of the fan. No new reports from backcountry users at the time of this being published.

Confidence

Problems

Wind Slabs

An icon showing Wind Slabs

Likelihood

Likely - Possible

Expected Size

1 - 2

The recent 25-40km/hr Southerly winds have pushed around the snow and built wind slab in the alpine and exposed tree line areas. Approach these areas with caution, test smaller adjacent features before committing.

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

Aspects:

All aspects.

Elevations:

Alpine, Treeline.

Valid until: Nov 23rd, 2021 4:00PM

Forecast Trend

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