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Archived

Avalanche Forecast

Jan 15th, 2015–Jan 16th, 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
2: Moderate
The avalanche danger rating below treeline will be moderate
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
2: Moderate
The avalanche danger rating below treeline will be moderate
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

The Dec 17 surface hoar layer should still register as a concern in your daily trip plan.

Weather Forecast

We should see a mix of sun and cloud this morning with increasing cloud and flurries late this afternoon.  Light SW winds increasing to gusty moderate SW winds should accompany the front as it pushes through.  By Friday expect the present surface hoar layer to be buried under 15cm of storm snow, a new layer to watch.

Snowpack Summary

A new surface hoar layer is building right to mountain top.  It is widespread to just above treeline and spotty in the alpine.  A 2-3cm suncrust can be found on steep solar aspects.  The Dec 17 surface hoar layer (down 60-110cm) has a well settled slab sitting on top of it in most locations.

Avalanche Summary

There has been a few solar triggered surface slides observed each day this week at alpine and treeline elevations. Two size 2 slabs occurred on North aspects Tuesday and last weekend a size 2 was ski cut on a moraine feature up Loop Brook.  These slabs all came out on the December 17th layer.

Confidence

Intensity of incoming weather systems is uncertain

Avalanche Problems

Persistent Slabs

The December 17th surface hoar layer is still a real concern. This layer is widespread at treeline and more spotty at alpine elevations. The December 17th could still be reactive in locations where it has yet to avalanche.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3