Avalog
Register
Get forecast notifications
Create an account to receive email notifications when forecasts are published.
Register
Login
Archived

Avalanche Forecast

Jan 31st, 2015–Feb 1st, 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
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
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Jasper.

Sensible decision making was observed in the Parkers Area today by field team.  Skiers are respecting the sensitive storm slab conditions that exist.

Weather Forecast

Clear overnight with clouds and snow moving in by noon on Sunday.  4-6 cm expected with light SW winds.  Temps remaining seasonal.

Snowpack Summary

Recent warm temperatures and rain followed by cooler temps have produced a widespread crust up to 2400m on all aspects. Above this, previous wind affected surfaces in exposed areas and wind slabs on lee aspects. 15-20 cm of storm snow is now sitting over this crust and has blown into wind slabs at tree line and above.

Avalanche Summary

An avalanche cycle has taken place in the last 24 hrs. Numerous solar triggered size 2 slab and loose snow avalanches at tree line and sub alpine on W aspects failing on the rain crust.  3 size 2 slab avalanches on E aspects  failing on rain crust at tree line and above. Size 3 explosive triggered avalanche at Marmot stepped down to Nov crust.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Tuesday

Avalanche Problems

Storm Slabs

The interface between storm snow and the melt-freeze crust from the recent warm temperatures warrants investigation. Touchy conditions should be expected in steep terrain, on all aspects below 2400m.
Avoid steep lee and cross-loaded featuresBe cautious of sluffing in steep terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Deep Persistent Slabs

This layer remains a concern in isolated areas above treeline and may be triggered by large loads such as cornices or from shallow areas by skiers. Explosive control work yielded  big results at Marmot on Saturday on this interface.
Avoid steep slopes below cornices.Avoid shallow snowpack areas where triggering is more likely.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3