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Archived

Avalanche Forecast

Mar 28th, 2015–Mar 29th, 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
3: Considerable
The avalanche danger rating below treeline will be considerable
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
3: Considerable
The avalanche danger rating below treeline will be considerable
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
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Kananaskis.

The snowpack is isothermal at lower elevations. Hazard levels will be highly dependent on the quality of the overnight freeze and the extent of daytime heating and solar radiation. Keep an eye on localized conditions.

Confidence

Good

Weather Forecast

Mainly cloudy on Sunday with no precipitation expected. Alpine temperature should reach -2 °C, with ridge wind out of the west: at50 km/h gusting to 90 km/h. Freezing level are forecast to reach 2100 metres.

Avalanche Summary

Several loose wet up to size 2.0 observed on all aspects below 2400m. Extensive snowballing at treeline and below.

Snowpack Summary

5 to 15cm of heavy wet snow fell at treeline in the past 36hrs, with rain below 2200m. Snow conditions are isothermal below treeline and boot penetration is to ground. Thin storm slabs are present in the alpine on all aspects.

Avalanche Problems

Loose Wet

A weak freeze is likely overnight Saturday, but expect the snowpack to warm up quickly Sunday as the snowpack is currently isothermal at lower elevations. Any sunny periods will also warm the snowpack rapidly.
Watch for clues, like sluffing off of cliffs, that the snowpack is warming up. >Be very cautious with gully features.>Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.>Avoid steep Southerly aspects.>Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Very Likely

Expected Size: 1 - 3

Wind Slabs

Recently formed thin wind slabs have added to previously formed wind slabs in alpine areas. Be curious as you enter the alpine and carefully observe the bond between these wind slabs and the previous surfaces. Conditions are highly variable.
Caution in lee and cross-loaded terrain near ridge crests.>Avoid freshly wind loaded features.>

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 4

Deep Persistent Slabs

The basal weak layers have been dormant of late, but warm temperatures and recent loading could awaken this persistent weak layer, especially in steep and shallow snowpack areas.
Avoid convexities or areas with a thin or variable snowpack.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 5