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Avalanche Forecast

Archived

Feb 26th, 2022–Feb 27th, 2022

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Banff Yoho Kootenay.

More wind on the way as a Westerly flow moves into the region.

Weather Forecast

A Westerly flow will bring increase cloud cover and strong winds to the region. Light precipe with minimal accumulation is expected by end of day Sunday. As the system continues to move East, snow fall amounts will increases with a total accumulation by Tuesday of 10-30cm. Freezing levels will climb to 1600m by Tuesday.

Snowpack Summary

Extensive wind effect in the alpine and some treeline elevations. 20-40 cm of soft faceted recent storm snow in sheltered areas over the Feb 15 interface. The Jan 30th surface hoar/sun crust layer is down 35 to 60 cm and variable in distribution and reactivity, producing moderate sudden planar to no results in snowpack tests.

Avalanche Summary

A remote cornice failure triggered a size 3 avalanche in Kootenay National Park on Wednesday. On a flight over the forecast region Saturday several old avalanches from early last week were observed, this activity appeared to be a combination of wind slabs, storm slabs and loose dry. No NEW avalanches observed or reported Saturday.

Confidence

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.