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Avalanche Forecast

Archived

Nov 20th, 2021–Nov 21st, 2021

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

Regions

Glacier.

Watch the Wind this Weekend.

Below treeline many gremlins still lurk waiting to steal your ski tips... watch out!

Weather Forecast

The Pacific storms will be passing north of us this weekend, leaving us with unsettled conditions and scattered flurries.

Tonight: trace snow, freezing level (fzl) 800m, wind SW 30-40km/h

Sunday: trace of snow. Fzl rising to 1200m. Wind SW 30km/h

Monday: 5cm of snow. Fzl 1300m. Wind SW 30km/h gusting to 55km/h.

Snowpack Summary

In the past 24hrs 10-20cm of new snow has fallen and is currently being redistributed by sustained moderate southerly winds. At treeline, this new snow covers the widespread November 15th crust; below, travel remains exceptionally poor. The November 5th crust has been found to be decomposing near the bottom 1/3rd of the snowpack.

Avalanche Summary

No new natural or human triggered avalanches have been observed or reported from the back country and highway corridors in the past 3 days. We registered the Howitzers on Thursday, firing artillery at very steep terrain in the highway corridor with little to no result.

Confidence

Timing, track, or intensity of incoming weather system is uncertain

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.