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Archived

Avalanche Forecast

Mar 7th, 2021–Mar 8th, 2021
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
1: Low
The avalanche danger rating below treeline will be low
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
1: Low
The avalanche danger rating below treeline will be low
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Kananaskis.

The recent heat has helped to settle the snowpack, but we are still seeing localized wind slabs near ridges that could react and avalanche. 

Confidence

High -

Weather Forecast

Tomorow will start with a temperature of -12, but warm up to about -6 by mid afternoon. No significant snow is forecast, but some isolated flurries are likely. Winds will subside as the day goes on and settle at L/SW by mid afternoon.

Avalanche Summary

A few minor loose dry sluffs out of steep, wind exposed areas. No new slab avalanches.

Snowpack Summary

A walk to Tent Ridge today had 5-10cm low density snow on top of an insulated crust from the past few days. This crust is about 4cm thick and more pronounced on solar aspects. At treeline, the underlying crust was replaced with a hard windslab that was basically in the surface. A quick hole had the Feb 19th interface down 50-60cm and inconsistently reactive in tests. Despite a well settled snowpack in tests, we still bailed from the ridge early, suspecting reactive windslabs in the immediate lee.

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Avoid lee and cross-loaded terrain.
  • Pay attention to isolated alpine features as well as cross-loaded features at treeline.
  • Be alert to conditions that change with elevation and sun exposure.
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet

Avalanche Problems

Persistent Slabs

Despite the strong heat not much activity was observed on this interface. Recent skier triggerred activity indicate that it should still be very much in your mind as you travel. 

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1.5 - 3

Wind Slabs

Windslabs exist in the upper snowpack that feel drummy and cakey in some areas. Be aware of the potential for wide propagations. 

.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely - Very Likely

Expected Size: 1.5 - 2.5