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Archived

Avalanche Forecast

Mar 1st, 2022–Mar 2nd, 2022
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
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
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Banff Yoho Kootenay.

New wind slab development will be the main hazard to make decisions about on Wednesday. If winds stay elevated,  sloughing in extreme terrain will also likely occur.

Weather Forecast

5-10cm is expected overnight Tuesday into Wednesday. Temperatures will remain mild with around 1700-1800m freezing levels. We could see some rain below these elevations. Winds will be moderate, and decrease Wednesday evening. A slow cooling trend will start on Thursday and into the weekend.

Snowpack Summary

15-25cm of recent snow overlays previous surfaces which include wind effected and faceted snow and sun-crusts. The Feb 15 sun-crusts/hard slab interface is down 40-60cm. The Jan 30th surface hoar/sun crust layer is down 50-80 cm and variable in distribution and reactivity, producing moderate sudden planar to no results in snowpack tests.

Avalanche Summary

Some small spindrift avalanches were observed in extreme terrain on a flight to the Balfour Hut Tuesday that were wind driven . No other observations observed or reported.

Confidence

Freezing levels are uncertain on Wednesday

Avalanche Problems

Wind Slabs

New snow, mild temperatures, and moderate to strong SW winds will continue to build new wind slabs on Wednesday. These may be forming over a variety of surfaces including old wind effect, sun crusts and facets.

  • Watch for surface cracking and stiffer surface layers of snow.
  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2