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Archived

Avalanche Forecast

Mar 9th, 2025–Mar 10th, 2025
Alpine
4: High
The avalanche danger rating in the alpine will be high
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
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
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: Banff, Banff Yoho Kootenay, East Side 93N, Field, Kootenay, LLSA, Lake Louise, Little Yoho, Sunshine, West Side 93N.

Heavy snowfall has resulted in over 50 cm of new snow, with more expected, in the northern part of the forecast region. The avalanche danger is expected to remain HIGH over the next few days.

Parks Canada will be conducting avalanche control on Mt Bosworth and Mt Stephen on Monday, March 10. No access to these zones on March 10.

Confidence

No Rating

Weather Summary

An atmospheric river will continue to bring heavy snowfall to the region Sunday night. This system has primarily affected the northern parts of the region. Snow amounts so far ranges from over 50 cm at Bow Summit to 10 cm in the Simpson area. An additional 20 to 30 cm of snow is possible Sunday night before conditions begin to clear. Winds will start to decrease Monday, and freezing levels will drop to valley bottoms.

Terrain and Travel Advice

  • Avoid avalanche terrain during periods of heavy snowfall.
  • Loose avalanches may step down to deeper layers, resulting in larger avalanches.

Avalanche Problems

Persistent Slabs

Over the past week, numerous avalanches have occurred on these layers (20-50cm deep). With incoming snow and strong winds this weekend, the likelihood of both natural and human-triggered avalanches will rise.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1.5 - 3

Loose Dry

Strong alpine winds on Saturday triggered many small loose dry events in lee terrain. Expect this activity to continue and spread to lower levels as the storm progresses Sunday.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely - Very Likely

Expected Size: 1 - 2

Wind Slabs

Strong SW winds developed overnight Friday and have been moving snow all day Saturday. On solar aspects slabs will sit on suncrusts while on sheltered, shaded slopes they may sit on surface hoar. Expect these fresh, sensitive surface slabs to develop as the storm progresses.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2