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Avalanche Forecast

Feb 26th, 2015–Feb 27th, 2015
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
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: Northwest Inland.

Use increased caution on sun exposed slopes during the afternoon warming.Are you a member of Avalanche Canada? Join today at avalanche.ca/membership

Confidence

Fair - Timing or intensity of solar radiation is uncertain

Weather Forecast

The ridge of high pressure rebuilds on Friday resulting in dry and sunny conditions for the next three days. On Friday, freezing levels should reach 600-800m and alpine winds should be moderate-to-strong from the NE. On Saturday, lower freezing levels may reach around 1000m. However, an inversion may form and there is the potential for a layer of warm air to sit at alpine elevations. Alpine winds are forecast to remain moderate-to-strong. Conditions should be much the same on Sunday.

Avalanche Summary

No new avalanches have been reported since Monday when numerous wet releases up to Size 2 were reported from steep sun-exposed slopes. Isolated cornice failures and ice falls have also recently been reported. Last week several full-depth avalanches up to Size 3 were observed on all but North aspects. As we get increased sun and warming heading into the weekend, these types of avalanches could once again become a problem.

Snowpack Summary

A dusting of new snow may have buried the previously variable snow surface which may have included wind-pressed surfaces or old wind slabs, a sun crust or old rain crust, surface hoar, and/or surface facets. A layer of surface hoar buried in the upper snowpack has been reported in some areas and is worth investigating before committing to any big alpine terrain. At the base of the snowpack, weak facets may be persisting.

Avalanche Problems

Wind Slabs

Strong outflow winds may cause reverse loading. Use extra caution as you transition into wind affected terrain.
Be cautious as you transition into wind affected terrain.>

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2

Deep Persistent Slabs

This is a very low probability problem with large consequences. A weak basal layer resulted in several full depth avalanches during the last sunny period which could be repeated this weekend. Avoid steep sun exposed slopes during the afternoon.
Be aware of the potential for full depth avalanches due to deeply buried weak layers.>Avoid steep unsupported planar slopes when the solar radiation is strong.>

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

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 3 - 5