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Archived

Avalanche Forecast

Feb 9th, 2014–Feb 10th, 2014
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
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

Regions: Jasper.

If precipitation amounts exceed expectations on Tuesday and Wednesday, hazard rating will incrementally increase especially with winds.

Weather Forecast

Weather models are not agreeing with precipitation amounts this week. Some say a trace Monday to Wednesday while others say 15cm on Monday, 15-20 on Tuesday, and 10-15 on Wednesday. Maybe locally at the Icefields. I expect lesser precipitation amounts for our region as the variables don't appear to be lining up. 

Snowpack Summary

Surface facetting and surface hoar continues to form with the cold temps. A Hard mid-pack is providing bridging strength over the weak basal facet layer at tree line and above. Below treeline where the snowpack exceeds 70cm, it has a supportive mid-pack.

Avalanche Summary

No new avalanches reported Sunday. An avalanche patrol down Highway 93 on Friday observed several size 1.5 slab avalanches in the alpine on reverse loaded features likely from the previous three days. Similar observations were seen in the Maligne valley as well. No patrol occurred on Saturday.

Confidence

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

Avalanche Problems

Deep Persistent Slabs

This layer may become reactive if there is a sudden temperature warming through the day. 
Carefully evaluate and use caution around thin snowpack areas.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3