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Avalanche Forecast

Archived

Nov 21st, 2024–Nov 22nd, 2024

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

South Rockies, Akamina, Bull, Crowsnest North, Crowsnest South, Elkford East, Elkford West.

Cautious travel is advised.
Small avalanches could have big consequences if they carry you into a terrain trap.

The snowpack is shallow and hides many hazards, like rocks and stumps.

Confidence

Low

Avalanche Summary

No new avalanches were reported on Wednesday or Thursday.

On Tuesday, a few large (size 2) storm slab avalanches were triggered with explosives by local operations.

Snowpack Summary

30-40 cm of soft snow sits on top of a crust from early November that's just above the ground. The crust may have weak, sugary facets on top, if this is the case large avalanches are possible.
Snowpack depths are expected to be 40-60 cm at treeline.

Weather Summary

Thursday Night

Mostly cloudy with up to 5 cm of snow. 10 km/h southwest ridgetop wind. Treeline temperature -9 °C.

Friday

Cloudy with 5 to 10 cm of snow. 10 km/h east ridgetop wind. Treeline temperature -8 °C.

Saturday

Cloudy with 5 to 10 cm of snow.10 km/h southwest ridgetop wind. Treeline temperature -9 °C.

Sunday

Mostly cloudy with 5 to 10 cm of snow. 10 km/h west ridgetop wind. Treeline temperature -7 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Use small, low consequence slopes to test the bond of the new snow.
  • Watch for fresh storm slabs building throughout the day.
  • Use caution above cliffs and terrain traps where even small avalanches may have severe consequences.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.