Archived

Avalanche Forecast

Jan 31st, 2019–Feb 1st, 2019

Alpine

3: Considerable

The avalanche danger rating in the alpine will be considerable

Treeline

3: Considerable

The avalanche danger rating at treeline will be considerable

Below Treeline

3: Considerable

The avalanche danger rating below treeline will be considerable

Alpine

4: High

The avalanche danger rating in the alpine will be high

Treeline

4: High

The avalanche danger rating at treeline will be high

Below Treeline

4: High

The avalanche danger rating below treeline will be high

Alpine

3: Considerable

The avalanche danger rating in the alpine will be considerable

Treeline

3: Considerable

The avalanche danger rating at treeline will be considerable

Below Treeline

2: Moderate

The avalanche danger rating below treeline will be moderate

Regions: Jasper.

Highway 93N, Icefields Parkway will be closed at 10:00, Friday, February 1st from Athabasca Falls to Sask River Crossing. Expected opening: Saturday at 18:00. (low confidence)Check Alberta511 for updated

Weather Forecast

Periods of snow, at times heavy. Accumulation in Icefields: 14cm overnight Thursday; 20cm on Friday; 8 -10cm Saturday. Temps drop over the day Saturday with an overnight low of -28. Valley bottom freezing levels. Mostly light SW winds, gusting at ridge tops. A detailed mountain weather forecast is available from Avalanche Canada.

Snowpack Summary

Forecasted storm snow over this weekend (potentially up to 50cm), will change everything in the snowpack. The existing upper snow pack continues to settle over surface hoar, down 5-10cm deep. Solar aspects have buried surface sun/temperature crusts at TL and below. Below that, a strong mid-pack sits over a deep persistent weakness.

Avalanche Summary

No new avalanches have been observed or reported. Help forecast - share observations HERE, on the Mountain Information Network!

Confidence

Intensity of incoming weather systems is uncertain

Avalanche Problems

Storm Slabs

Avoid avalanche terrain until the storm subsides and the snowpack can settle.

Avoid avalanche terrain during periods of heavy loading from new snow and wind.Avoid exposure to avalanche terrain, large avalanches may reach the end of run out zones.

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Deep Persistent Slabs

New snow may overload the deep persistent weakness. Avoid avalanche terrain.

Avoid exposure to overhead avalanche terrain, large avalanches may reach the end of run out zones.Avoid avalanche terrain during periods of heavy loading from new snow and wind.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1.5 - 3.5