Glacier National Park Avalanche Forecast

Issued: Mar 30th, 2021 8:05AM

Mon Mar 29th Current Conditions
Alpine Considerable Treeline Moderate Below Treeline Low
Tue Mar 30th 2 Day Outlook
Alpine Moderate Treeline Moderate Below Treeline Moderate
Wed Mar 31st 3 Day Outlook
Alpine Moderate Treeline Low Below Treeline Low

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

Carefully evaluate storm slab reactivity as you travel today.

Caution is required, especially in wind exposed areas where human triggering is likely!

Summary

Weather Forecast

Cooler and drier conditions will prevail again today. Expect all types of weather today (sun, cloud, snow, and wind), as Spring convective conditions persist. Clouds are forecast to clear this evening, and temperatures remain cool. Tomorrow, a warmer airmass begins to move in, bringing a mix of sun and cloud and freezing levels rising to 1800m.

Snowpack Summary

Since Friday, Rogers Pass has received ~85cm of snow at treeline! Strong Southerly winds and warm temperatures that accompanied the new snow has formed reactive storm slabs. The March 18th layer is now buried 40-100cm depending on aspect and elevation.

Avalanche Summary

Numerous natural and artificially triggered avalanches occurred on the weekend in the Highway Corridor. The average size was 2 to 3, with several size 3.5s, and a few size 4s. There was one skier accidental Min report from Hospital Gullies yesterday. A report from Connaught Creek yesterday mentioned Grizzly Slide Path buried the skin track.

Confidence

Due to the number of field observations

Problems

Storm Slabs

An icon showing Storm Slabs

Likelihood

Likely

Expected Size

1 - 2.5

A significant storm Sunday brought plenty of snow, wind, and warm temperatures to Rogers Pass.  Cooler temps since seem to have decreased sensitivity of this layer, but it still deserves respect especially in wind affected areas.

  • Watch for signs of instability such as whumpfing, or cracking.
  • Use caution in lee and cross-loaded terrain near ridge crests.

Aspects:

All aspects.

Elevations:

Alpine, Treeline.

Valid until: Mar 31st, 2021 8:00AM

Forecast Trend

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