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Avalanche Forecast

Archived

Nov 26th, 2023–Nov 27th, 2023

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

Regions

Lizard-Flathead, Akamina, Flathead, Lizard.

It's early season conditions with a thinner than usual snowpack. Watch for hazards under the snow like rocks and stumps - and avoid freshly wind loaded slopes around ridgeline.

Confidence

Moderate

Avalanche Summary

Small loose dry 'sluffing' has been observed over the last few days.

Observations are limited this time of year, please consider filling out a MIN report.

Snowpack Summary

Expect early season conditions with a shallower than average snowpack, at treeline depths are between 40 and 60 cm. Below treeline snowpack depths taper off quickly.

Recent winds have varied in direction. these winds have scoured some terrain features in the alpine and formed small pockets of wind slab on exposed features.

A crust with facets below exists at or near the ground.

Weather Summary

Sunday Night

Partly cloudy skies with no new snow expected, northwest winds 20 to 40 km/h.

Monday

Partly cloudy skies with no new snow expected, west alpine winds 25 to 40 km/h, possibly gusting to 60 km/hr in the alpine. Treeline temperature -9°C.

Tuesday

Mostly clear skies, winds remain strong at ridgeline, around 50 km/hr. No new snow. Treeline temperatures around -6°C

Wednesday

Partly cloudy with no new snow. Westerly winds ease, 20-30 km/hr.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Small avalanches can have serious consequences in extreme terrain. Carefully evaluate your line for wind slab hazard before you commit to it.

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.