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Archived

Avalanche Forecast

Mar 4th, 2022–Mar 5th, 2022
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
1: Low
The avalanche danger rating below treeline will be low
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
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.

Avalanche activity increased on Friday, and this trend could continue into the weekend. Intense solar radiation will likely make solar aspects more reactive on Saturday. Use caution in bigger Alpine terrain.

Confidence

High -

Weather Forecast

Saturday looks to be a sunny day with light northerly winds. It will start off cool (near -18) and warm to -7 at treeline elevations. Some models are calling for light flurries late Saturday afternoon, and some are not.

Avalanche Summary

Several small loose dry avalanches were observed in steep Alpine terrain over the past few days. In addition, a few naturally triggered wind slabs up to size 2.0 occurred on all aspects in the alpine, with one running almost full path. On Thursday a size 2.0 cornice failure occurred near Hero's Knob, almost reaching a number of up-tracks in the drainage. On Wednesday forecasters remotely triggered a size 2.5 avalanche on a SE alpine bowl. This slab was 30 to 40cm thick and ran for 450m.

Snowpack Summary

Another 5cm in the last 24 hours brings recent storm snow totals to 25 to 40cm in the last few days. This recent snow remains low density below 2600m. Thin wind slabs are found in Alpine terrain, with several naturally triggered slides observed on Friday on all aspects. Solar aspects are also a concern as the Feb 19 sun crust is buried up to 40cm. This crust layer has caused several avalanches in the past few days, both natural and human-triggered.

Terrain and Travel

  • Be alert to conditions that change with elevation and wind exposure.
  • Closely monitor how the new snow is bonding to the crust.
  • Wind slabs may be poorly bonded to the underlying crust.
  • Minimize exposure to sun-exposed slopes when the solar radiation is strong.

Avalanche Problems

Wind Slabs

Wind slabs are being noted in lee and cross-loaded terrain. Recent natural activity indicates that these slabs are reactive. As north winds continue overnight, they may become more developed on southern aspects. 

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1.5 - 2.5

Persistent Slabs

Carefully evaluate the bond of the new snow to the underlying crust. Steep solar aspects and unsupported terrain should be carefully considered or avoided. Intense solar input will make this problem much more reactive.

Aspects: South East, South, South West, West.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1.5 - 2.5