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Archived

Avalanche Forecast

Apr 21st, 2015–Apr 22nd, 2015
Alpine
Below Threshold
The avalanche danger rating in the alpine will be below threshold
Treeline
Below Threshold
The avalanche danger rating at treeline will be below threshold
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
Alpine
Below Threshold
The avalanche danger rating in the alpine will be below threshold
Treeline
Below Threshold
The avalanche danger rating at treeline will be below threshold
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
Alpine
Below Threshold
The avalanche danger rating in the alpine will be below threshold
Treeline
Below Threshold
The avalanche danger rating at treeline will be below threshold
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Jasper.

Heads up-we have entered Spring Conditions. Conditions can change dramatically throughout the day.Start EARLY and finish EARLY!

Weather Forecast

Clouds rolling in this evening bringing wet conditions and cooler temps over the next few days. Expect typical moist April conditions.

Snowpack Summary

Warm temps and high fzl have added load to upper snowpack.  At treeline, lee aspects have a series of windslabs sandwiched with thin weaknesses in the upper snowpack. A strong midpack bridges over weak basal facets on Northerly aspects at treeline and above.

Avalanche Summary

Numerous loose wet avalanches to size 2.5 noted today at most elevations- some running on crusts and others scouring to ground. Cornice failures to size 2.5 have occurred around the Icefields area on North to East aspects. They did not initiate a slab on the slopes below.

Confidence

Avalanche Problems

Loose Wet

As temperatures warm up so does the potential for loose wet avalanches. It may be enough to trigger deeper basal layers on steeper unsupported slopes.
Watch for terrain traps where small amounts of snow will acumulate into deep deposits.Start and finish early before the surface crusts melt.

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

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 3

Cornices

Cornices are large and can collapse anytime. Stay well back from the edge while traveling along ridge lines. Pay attention to what is above and avoid cornice exposed slopes.
Give cornices a wide berth when travelling on or below ridges.Do not travel on slopes that are exposed to cornices overhead.

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 3