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Avalanche Forecast

Dec 20th, 2024–Dec 21st, 2024
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Avoid steep, wind-loaded slopes. Recently formed wind slabs may remain reactive to rider-triggering.

Confidence

Moderate

Avalanche Summary

On Wednesday, skier-triggered wind slabs (size 1) were reported from alpine and treeline terrain.

On Thursday, explosive control produced one size 1 wind slab from alpine terrain.

Snowpack Summary

Up to 20 cm of recent snowfall accompanied by southwest winds created wind slabs in lee areas and scoured surfaces at alpine and treeline elevations.

Below the recent snow is a melt-freeze crust on south-facing slopes and hard, wind-pressed snow in exposed terrain.

The snowpack depth varies greatly, windward slopes may only have 50 cm on them while leeward slopes could have as much as 200 cm.

Weather Summary

Friday Night

Cloudy with isolated flurries. 20 to 60 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Saturday

A mix of sun and cloud with isolated flurries. 15 to 40 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Sunday

A mix of sun and cloud with isolated flurries. 20 to 50 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Monday

Cloudy with up to 2 cm of new snow. 20 to 50 km/h southwest ridgetop wind. Treeline temperature -4 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep your guard up at all elevations. Wind slab formation has been extensive and could extend into openings below treeline.
  • Use ridges or ribs to avoid areas of wind-loaded snow.

Avalanche Problems

Wind Slabs

Recently formed wind slabs may remain reactive to rider-triggering. Avoid wind-loaded areas where the snow feels stiff or slabby.

Aspects: North, North East, East, South East, South, North West.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 2