Avalog Join
Archived

Avalanche Forecast

Feb 11th, 2023–Feb 12th, 2023
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Fresh storm slabs will require some time to settle and stabilize, use extra caution as you transition into wind effected terrain.

Confidence

Moderate

Avalanche Summary

There were a few large natural avalanches (up to size 3.0) from steep terrain in the highway corridor Friday through Saturday morning.

Snowpack Summary

Up to 60cm of storm snow has fallen in the past week, accompanied by periods of strong SW winds. This has left several potential failure planes in the upper snowpack, especially in wind exposed areas.

The mid-snowpack is generally well bonded, rounded grains.

The basal Nov 17 deep persistent weak layer has not produced any slab avalanches in GNP for several weeks now, but persists in many places as faceted crystals - these are accompanied by a decomposing crust in some locations.

Weather Summary

Another frontal system arrives Sunday night into Monday.

Tonight: Mainly cloudy with isolated flurries, Alpine low -9°C. Light SW ridgetop winds.

Sunday: Flurries turning to snowfall in the afternoon (10-15cm). Alpine High -5°C. Moderate-strong SW wind.

Monday: Snow (10-15cm). Low -10°C, High -7°C. Strong SW wind.

Tuesday: Mix of sun and cloud. Low -16°C, High -11°C. Light northerly winds.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Avoid freshly wind loaded terrain features.

Avalanche Problems

Storm Slabs

The storm slabs from Friday are settling and strengthening, but incoming snow and wind on Sunday afternoon could rebuild this problem quickly.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 3