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Archived

Avalanche Forecast

Jan 23rd, 2014–Jan 24th, 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
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

Regions: Purcells.

Confidence

Good

Weather Forecast

A high pressure ridge will continue to bring dry, warm conditions.Friday and Saturday: An inversion will generate an above freezing layer from around 2200 to 3300m. Expect some cloud around 2000 m as well as some strong alpine sunshine. Alpine temperatures will reach around +4C and will feel higher still in the sunshine. Ridgetop winds 20-30 km/h from the NW.Sunday: A cooler day as far as air temperatures go, but cloud dissipating, so treeline areas may actually feel warmer. Slightly windier, with Winds gusting to 30 km/h from the NW.

Avalanche Summary

Minor sluffing up to size 1 was observed in the new snow on Wednesday.

Snowpack Summary

The recent dry, warm weather has generally consolidated the upper snowpack. Old, stubborn hard wind slabs may exist under a skiff of new snow. Steep, sun exposed features are most likely seeing a daily melt-freeze cycle.The biggest concern throughout the region is a layer of weak sugary depth hoar at the base of the snowpack which may coexist with a crust which formed in October. I would continue to be suspicious of any large or unsupported upper elevation slopes, especially if they haven't already avalanched. Possible triggers include a heavy load over a thin spot, a cornice fall or rapid temperature change. Any avalanche failing at this interface would be highly destructive.

Avalanche Problems

Deep Persistent Slabs

The chance of triggering a deep persistent slab is greatly reduced. However if you did trigger such an avalanche, the consequences would be great. The most suspect slopes would be thin or variable alpine start zones on steep convex slopes.
Be aware of the potential for full depth avalanches due to deeply buried weak layers.>Caution around convexities or areas with a thin or variable snowpack.>Conditions have improved, but be mindful that deep instabilities are still present.>

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 3 - 6