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Avalanche Forecast

Archived

Jan 23rd, 2021–Jan 24th, 2021

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Banff Yoho Kootenay.

Strong temperature inversions spell cold mornings on the skin track or on valley bottom climbs. Use the sun to your advantage if possible and carry extra layers to be prepared for un-expected delays or emergencies.

Weather Forecast

Continued inverted temperatures with -25C or colder in the valley bottoms to start the day, and warmer in the alpine (-15C). Alpine winds will increase to moderate/strong on Saturday night, and will decrease to light by midday Sunday. Expect some more cloud on Sunday but no significant snow in the forecast.

Snowpack Summary

Significant wind effect exists in all alpine areas with isolated wind slabs in steep loaded areas of the high alpine. Soft surface snow remains just below ridge crests at treeline. The upper snowpack is faceting. This has diminished the sensitivity of wind slabs, and rendered the four layers of surface hoar visible in the upper meter, as dormant..

Avalanche Summary

No new avalanches observed or reported today. Some minor surface sluffing noted in very steep (over 45degree) terrain in Kootenay.

Confidence

Due to the number and quality of field observations

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.