Banff Yoho & Kootenay National Park Avalanche Forecast

Issued: Mar 10th, 2021 4:00PM

Wed Mar 10th Current Conditions
Alpine Low Treeline Low Below Treeline Low
Thu Mar 11th 2 Day Outlook
Alpine Moderate Treeline Moderate Below Treeline Low
Fri Mar 12th 3 Day Outlook
Alpine Moderate Treeline Moderate Below Treeline Moderate

The alpine rating is low, the treeline rating is low, and the below treeline rating is low. Known problems include Persistent Slabs.

Cold temperature and generally light winds will keep the danger LOW for one more day. New snow is accumulating in different amounts in different valleys (spring) so pay close attention to local accumulations where the alpine danger could be MODERATE.

Summary

Weather Forecast

Up to 10 cm expected in some areas by Thursday morning before it clears up and becomes a beautiful day. Sunny with cool temps (-20 to -5) through the day and relatively light winds. Temperatures will warm up for the weekend with freezing levels expected to reach 2500 m on Saturday.

Snowpack Summary

Fresh snow in spotty areas from spring squalls, but mostly firm surface crust on south aspects up to at least 2600 m with softer snow found on north aspects. Minimal recent wind effect at higher elevations except in steep, alpine gullies. Profile at 2200 m today showed the Feb. 19 and Jan. 27 facets in the upper meter but no results on column test.

Avalanche Summary

No new avalanches reported today except sluffing in alpine gullies with the short storm. On Tuesday, several large persistent slabs were reported in high north aspects and we assume these were triggered by large cornice falls.

Confidence

Problems

Persistent Slabs

An icon showing Persistent Slabs

Likelihood

Unlikely

Expected Size

1.5 - 3

This problem continues to linger and should be considered on alpine northern aspects where it appears large cornices can be the trigger. This means you should also watch your exposure to slopes overhead when on north aspect terrain.

  • Pay attention to overhead hazards like cornices which could trigger the persistent slabs.

Aspects:

North, North East, North West.

Elevations:

Alpine.

Valid until: Mar 11th, 2021 4:00PM

Forecast Trend

The latest forecast danger ratings, broken down to elevation. See how an elevation is trending.