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Archived

Avalanche Forecast

Apr 13th, 2015–Apr 14th, 2015
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
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: Jasper.

Still winter here as more snow expected tomorrow morning. Strong winds have developed windslab conditions on lee aspects in the alpine. Monitor the incoming storm input for additional load. 

Weather Forecast

A pulse of snow is expected Tuesday am but models are not agreeing to the precise amount. Could be 5-15cm depending on local influences. Winds will be light from NW. Freezing levels will be 1800m on Tuesday then a good freeze Tuesday night followed by cool temperatures on Wednesday. 

Snowpack Summary

15cm to 20cm of recent storm snow has been whipped up by moderate winds into a windslab condition. This rests on a supportive temperature crust which exists up to 2500m. Weak basal facets are bridged by a strong mid-pack in most areas at treeline and above.

Avalanche Summary

Three cornice failures were noted today. One initiated a size 2 slab on Parkers ridge. 

Confidence

Intensity of incoming weather systems is uncertain on Tuesday

Avalanche Problems

Wind Slabs

Wind slabs have formed on lee slopes and cross loaded features at alpine and exposed tree line elevations.
Avoid cross loaded slopes at or above treeline.Use caution in lee areas. Recent wind loading have created wind slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Cornices

Cornice are large and ominous. Give them a wide berth whenever possible. Current winds will continue to build their mass.
Extra caution needed around cornices with current conditions.

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2