Glacier National Park Avalanche Forecast

Issued: Mar 1st, 2021 8:00AM

Sun Feb 28th Current Conditions
Alpine Considerable Treeline Considerable Below Treeline Moderate
Mon Mar 1st 2 Day Outlook
Alpine Considerable Treeline Moderate Below Treeline Low
Tue Mar 2nd 3 Day Outlook
Alpine Moderate Treeline Moderate Below Treeline Low

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

Windy day ahead!

Keep a close eye on snow transport today and assess for building wind slabs as the day progresses. 

Summary

Weather Forecast

A cold front across central BC will gradually move southward today

Today: Mainly cloudy with a trace of snow. Freezing level 1400m. Wind SW 30 km/h gusting to 90!

Tonight: Cloudy with scattered flurries. Accumulation: 5 cm. Freezing level: 900m. Wind SW 30 km/h gusting to 85.

Tuesday:  Cloudy with sunny periods and a trace of snow. Wind SW 20-30 km/h.

Snowpack Summary

More snow has fallen on the west end of the park than east. Since Wednesday, up to 70cm has been redistributed by sustained moderate S'ly wind. The Feb 14 drought interface is down ~1m in sheltered areas; this interface exists as a wind crust in exposed areas near the Pass, and buried windslabs, facets, or a thin suncrust as you move East or West.

Avalanche Summary

Yesterday, one notable size 2.5 avalanche was observed that occurred from a steep solar feature in the alpine. Saturday, several solar induced natural avalanches occurred from steep south aspects in the alpine to size 2.5, as well as a smaller wind-induced cycle from steep northerly aspects to size 2.0.

Confidence

Intensity of incoming weather systems is uncertain

Problems

Wind Slabs

An icon showing Wind Slabs

Likelihood

Likely

Expected Size

1 - 2.5

With lots of new snow available for transport, expect fresh windslab development in lee features and increased cornice growth.

  • Watch for shooting cracks or stiffer feeling snow. Avoid areas that appear wind loaded.
  • Use caution in lee areas. Recent wind loading has created wind slabs.

Aspects:

North, North East, East, West, North West.

Elevations:

Alpine, Treeline.

Storm Slabs

An icon showing Storm Slabs

Likelihood

Likely - Possible

Expected Size

1 - 2.5

Up to 70 cm of new snow this week may be more prone to slab formation with warming temperatures today. 

  • Watch for signs of slab formation, such as whumpfing and shooting cracks.
  • If triggered the storm slabs may step down to deeper layers resulting in large avalanches.

Aspects:

All aspects.

Elevations:

Treeline, Below Treeline.

Valid until: Mar 2nd, 2021 8:00AM

Forecast Trend

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