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Archived

Avalanche Forecast

Apr 4th, 2015–Apr 5th, 2015
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
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: Little Yoho.

Less snow is expected West of the divide in Little Yoho.  If more snow spills over into this region, the hazard may rise beyond the moderate rating.  Ski quality should be improved.

Weather Forecast

An additional 5-10cm will spill over to the Little Yoho region Saturday night as an intense upslope storm deposits much more east of the continental divide.  These will be associated with light SE winds Sunday and freezing levels to valley bottom.

Snowpack Summary

5-10 cm of recent snow overlies a prominent rain crust from March 28th. The mid layering and base of the snowpack is well settled in the forecast area of Little Yoho. Some recent snow has been redistributed by M-S winds earlier this week and these resultant wind slabs are buried in the alpine at ridge top and cross-loaded gulley features.

Avalanche Summary

No new avalanches reported in this area today.

Confidence

Forecast snowfall amounts are uncertain on Saturday

Avalanche Problems

Wind Slabs

Recent wind slabs will become buried with Saturday/Sunday's up-slope storm.

  • Use caution in lee areas. Recent wind loading have created wind slabs.
  • The new snow will require several days to settle and stabilize.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2

Loose Dry

New snow will sluff easily on any crust or hard wind pressed surface it is lying over.  If winds are stronger than forecast this will augment this problem.

  • The new snow will requires several days to settle and stabilize.
  • The snowpack on glaciers is shallow, and the use of a rope is recommended.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2