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Avalanche Forecast

Archived

Dec 30th, 2024–Dec 31st, 2024

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

Coquihalla, Manning, Skagit.

Monitor surface conditions as you gain elevation and move into wind affected terrain.

Slabs may remain triggerable by riders.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported, however observations have been limited. Please share any reports or photos on the Mountain Information Network (MIN).

While nearly a week ago, on Wednesday an avalanche was triggered on a rocky north face slope (see photo below). Reactivity may continue in wind loaded ridgeline features like this.

Snowpack Summary

30 to 60 cm of settling snow sits above a hard crust. Reports suggest that more wind effect can be found in the Coquihalla than Allison Pass.

The mid and lower snowpack are well consolidated with no deeper concerns.

Snow depth ranges from 100 to 150 cm at treeline in the Coquihalla, to 85 to 100 cm near Manning Park.

Weather Summary

Monday Night

Cloudy with flurries. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -6 °C.

Tuesday

Mostly clear skies, with afternoon cloud. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Wednesday

Partly cloudy. 10 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Thursday

Cloudy. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -2 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Seek out sheltered terrain where new snow hasn't been affected by wind.
  • Be alert to conditions that change with elevation, aspect, and exposure to wind.

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.