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Avalanche Forecast

Archived

Feb 2nd, 2022–Feb 3rd, 2022

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

Regions

Little Yoho.

Incoming winds will raise the danger over the next couple days. We have removed the persistent slab problem from this region due to a lack of reactivity. The Dec. 2nd crust layer still exists but for now appears to be dormant

Weather Forecast

Thurs AM will start cold (-20 to -25), but then temps will warm to more seasonal levels. We are expecting light precip on Thurs with trace to 5 cms depending on the model.  Friday will see slightly more precip with an additional 5-10 cms. Saturday will see only a trace amount of snow. Alpine winds will be strong to extreme from the W/NW throughout

Snowpack Summary

15-35 cm of snow on Sunday with moderate to strong W/NW winds have created soft windslabs in the alpine. This new snow sits on a variety of surfaces including, sun crust, previous wind effect, facets and surface hoar at treeline and below. The new snow was touchy on Mt. Field on Monday, but seems to have become less reactive with the cold temps.

Avalanche Summary

No new avalanches observed on a field trip on Wednesday in the Emerald Lake area. Local ski hills reporting only small soft windslab development in alpine and isolated treeline areas.

Confidence

Intensity of incoming weather systems 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.