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Archived

Avalanche Forecast

Apr 13th, 2013–Apr 14th, 2013
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: Banff Yoho Kootenay.

Spring storms can create quite variable snowfall amounts from one location to the next. Evaluate each slope individually.

Weather Forecast

The heavy snow fall warning looks to be mostly for areas east of the mountains, but we may see another 10-15cm over higher terrain

Snowpack Summary

There has been up to 30 cm of storm snow over the last few days. There is some wind effect in the alpine that has created isolated soft slabs in immediate lee terrain. These slabs overlay 10-30 cm of previous storm snow, which rests on suncrusts on solar aspects and facetted snow on polar aspects.

Avalanche Summary

No avalanches observed or reported. 

Confidence

Avalanche Problems

Wind Slabs

Watch for isolated soft slabs in the lee of alpine features.� These were obvious to see and avoid today, but will be blanketed by new snow tonight.�
Be cautious as you transition into wind affected terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Loose Dry

Loose snow avalanches involving the storm snow running underlying crusts can be expected to accompany snowfall and increase in winds forecasted for tonight and tomorrow.� This is a definite concern for skiers and climbers in gully/couloir features.
The new snow will require several days to settle and stabilize.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible - Likely

Expected Size: 1 - 2