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Archived

Avalanche Forecast

Apr 20th, 2013–Apr 21st, 2013
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
1: Low
The avalanche danger rating in the alpine will be low
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
1: Low
The avalanche danger rating in the alpine will be low
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Kananaskis.

Conflicting weather forecasts may make the hazard go up in some areas due to higher than expected snowfall amounts. Be aware of changing conditions and plan accordingly. MM

Confidence

Fair - Timing, track, or intensity of incoming weather is uncertain on Sunday

Weather Forecast

Despite the Environment Canada forecast, we are only expecting light amounts near the divide in the next 24 hours. The question will be how much we get from the convective activity that is ongoing. Winds are forecasted to die off overnight and become variable in direction. Freezing levels will steadily drop over the next 24 hours as well.

Avalanche Summary

A few small pockets of windslab were seen from the last couple of days and some larger wet loose avalanches are still visible from awhile ago.

Snowpack Summary

Up to 10cms today with the convective flurries. Storm slabs were thin and sporadic, but reactive to ski cuts. With the forecasted precip and winds, these could be an issue in the wrong area (terrain traps). Below that isolated pockets of  buried, reactive windslab exist in the ALP. For the most part these seem to be difficult to trigger. Compression tests today only gave hard results with non planar breaks.

Avalanche Problems

Storm Slabs

Today these were found in specific areas that were crossloaded and near ridges. At the moment these are small avalanches. If more snow arrives they will build quickly and become more of a problem. Be aware of terrain traps.
Avoid lee and cross-loaded terrain near ridge crests.>Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.>

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood: Possible - Likely

Expected Size: 1 - 3

Wind Slabs

Wind slabs are present in the alpine on lee and cross-loaded features. Isolated thin slabs are also found on South aspects due to recent Northerly winds. Carefully evaluate the bond between these slabs and the crusts beneath.
Carefully evaluate and use caution around thin snowpack areas.>

Aspects: North, North East, East, South East, South.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 4