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Archived

Avalanche Forecast

Mar 14th, 2018–Mar 15th, 2018
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
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: Jasper.

Incoming snow should improve the skiing and is not expected to increase the hazard level until Friday. Exercise extra caution if forecast snowfall amounts are exceeded.

Weather Forecast

Thursday will bring cloud cover and more seasonable temperatures with light flurries of 5-10cm and moderate to strong gusting northerly winds as the trough replaces our high pressure sunshine. Late Saturday is forecast to deliver an additional 15-20cm of snow with continued seasonal temperatures and light winds.

Snowpack Summary

Cooler temperatures and cloud cover will allow continued sintering and settlement of the upper snowpack. Few persistent weaknesses are active in the snowpack. Forecast snowfall with moderate winds should create new windslabs on lee features.

Avalanche Summary

Cooler temps and cloud cover will shut down the current solar-triggered avalanche cycle and new avalanches will require new snow or very large triggers. This past week, avalanches initiating near and below treeline were primarily loose/wet to sz 2.5, but some alpine slopes had also released as slabs to midpack.

Confidence

Forecast snowfall amounts are uncertain

Avalanche Problems

Persistent Slabs

Polar aspects still have cold, faceted snow and did not receive either solar triggers or significant snowpack settlement this past week. Steep, unsupported slopes should be treated with due respect.
Minimize exposure to overhead hazard from cornices.

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

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1.5 - 2.5