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Archived

Avalanche Forecast

Apr 13th, 2012–Apr 14th, 2012
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
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
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

Regions: Banff Yoho Kootenay.

Thursdays rain event changed the snowpack below 2500m, and resulted in an avalanche cycle at treeline and below. One more day of possible light drizzle Sat. with little freeze. Regular spring conditions should prevail starting Sunday. SH

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Freezing levels are uncertain on Saturday

Avalanche Problems

Wind Slabs

Up to 20cm of new snow will be reactive where it sits over sun crusts, as well as temperature crusts on shady asp. from high freezing levels earlier in the week. Caution is advised until the bond improves. Light snow Sat. at higher elevations.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 3

Loose Wet

Forecasts call for light rain tomorrow at treeline and below, and wet slides will be still possible if this comes to fruition.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Deep Persistent Slabs

Some slides occurred in the last 24 hours to 2.5 which gouged down to the basal facets during the rain. Activity will slow down as temperatures cool. Thin, steep areas and large loads such as cornice failure could possibly trigger deep weaknesses.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3