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Avalanche Forecast

Archived

Nov 26th, 2024–Nov 27th, 2024

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

Regions

Glacier.

Be on the lookout for isolated pockets of wind slab in leeward features and near ridgetop in the Alpine.

Trails returning to parking lots have become icy with lots of early season hazards like rocks and stumps at lower elevations.

Confidence

Moderate

Avalanche Summary

No new avalanche activity observed by the field team in Rogers Pass today.

On Nov 25 there was a report of a small, human-triggered avalanche on Macdonald West Shoulder.

Snowpack Summary

Variable surface conditions exist in the Park, with wind effected snow in higher Alpine areas and 10-20cm of settling snow in sheltered terrain features.

The Nov 9 crust is down 50-100cm and is producing limited results in snowpit testing. The base of the snowpack is comprised of several dense, melt-freeze rain crusts.

Treeline snowpack depths average 110-130cm.

Weather Summary

Northwesterly weather flow will bring cold temps and increasing wind.

Wed: Cloudy with sunny periods & isolated flurries. Trace snowfall. Alpine High -11 °C. Ridge wind W 20-35 km/h.

Thurs: Cloudy with sunny periods & isolated flurries. Trace snowfall. Alpine High -10. Ridge wind SW 15-25 km/h.

Friday: Cloudy with scattered flurries. 5 cm snow. Alpine High -9 °C. Wind SW 20 km/h gusting to 45

Terrain and Travel Advice

  • Carefully evaluate steep lines for wind slabs.

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.