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Archived

Avalanche Forecast

Mar 31st, 2015–Apr 1st, 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
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
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: Banff Yoho Kootenay.

If the weather forecast is accurate, we should be entering a period of good ski and avalanche conditions. Watch out for windslabs and large freshly formed cornices as we have responded to two very close calls with cornices in the last week!

Weather Forecast

We are returning back to seasonal temperatures for the foreseeable future with good overnight lows and mild daytime highs. Winds should die down by midday Wednesday as we come under the influence of a ridge of high pressure. Skis should be mostly clear with some lingering clouds for the forecast period.

Snowpack Summary

Below 2000 m the snow pack is rain saturated. In the alpine there is 15-20 cm of recent storm snowforming wind slabs on east through north aspects. The midpack above treeline is well settled and overlies a weak facetted base. These basal facets have not been reactive recently, but should still be considered when making terrain choices.

Avalanche Summary

No new avalanches observed or reported today, however Lake Louise and Sunshine reported significant cornice growth and several wind slabs up to size 1.5 being easily triggered on solar aspects yesterday. Wind slabs were far more stubborn to trigger on north aspects due warm temps and rapid settlement.

Confidence

Avalanche Problems

Wind Slabs

There is generally 10-20 cm available for transport and moderate SW winds have created wind slabs in exposed locations. These will be most reactive where they overlie a sun crust (solar aspects).
Use caution in lee areas. Recent wind loading have created wind slabs.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2