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Avalanche Forecast

Archived

Nov 21st, 2015–Nov 22nd, 2015

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, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Little Yoho.

Watch for wind slabs in exposed terrain on high alpine slopes, especially where they may overly facets.

Two storms have formed most of the current snowpack, and it is a very supportive snowpack considering it is only November. Great ski conditions!

Weather Forecast

High winds tonight and then moderately cool temperatures on Sunday and Monday. Light flurries are expected tomorrow with 10 cm forecast for Monday night.

Snowpack Summary

Today's Yoho field trip found a good stable early season snowpack. Some surface hoar and facetting was noted near the ground. The alpine has extensive windslabs, with thin areas and loaded lee pockets.

Avalanche Summary

Only minor results from explosive testing during the last three days.

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.