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Archived

Avalanche Forecast

Mar 4th, 2018–Mar 5th, 2018
Alpine
1: Low
The avalanche danger rating in the alpine will be low
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
1: Low
The avalanche danger rating in the alpine will be low
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
1: Low
The avalanche danger rating in the alpine will be low
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: Jasper.

A structurally weak snowpack may make travel in uncompacted terrain difficult, especially below treeline. The persistent mid-pack weakness can still be found at or near treeline, but has not been reactive for some time.

Weather Forecast

Over the next 36 hours, local snowfall amounts, and relentless N winds are both expected to remain light. It will stay cold with overnight lows in the Icefields/Maligne regions near -20 but, it feels tolerably warm on solar aspects during the day.

Snowpack Summary

Much of the regional snowpack is losing support and, facetting after two weeks of cold, dry weather. Wind slabs and extensive wind effect is found in all open areas. The upper snowpack is a 50 to 80 cm weakening slab, over the seasonally persistent instability.

Avalanche Summary

No new avalanche activity observed or reported.

Confidence

Avalanche Problems

Wind Slabs

Expect hard windslabs in the alpine and at treeline. The cold has reduced the probability for long propagations but caution is still warranted on exposed terrain features.
Best conditions found on sheltered aspects.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 1.5

Persistent Slabs

A cold, facetting, and structurally weak slab up to 80cm thick overlies: faceted crystals (well developed in shallow areas), surface hoar (at, and just above treeline), and sun crusts (on steep S and W aspects).
Be wary of slopes that did not previously avalanche.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1.5 - 3