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Archived

Avalanche Forecast

Feb 20th, 2023–Feb 21st, 2023
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
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

Updated on Tuesday at 6:30 AM. Watch for heightened avalanche conditions at upper elevations where unstable slabs may be found on wind-loaded slopes.

Confidence

Moderate

Avalanche Summary

On Saturday, a few size1 windslabs avalanches were triggered during travel on skis. These windslabs were located on north aspect terrain near 1600 m elevation.

Snowpack Summary

New snow from the past several days has accumulated over a variety of old surfaces including wind slabs in the alpine and a breakable freezing rain crust between 1100 m and 1600 m.

The mid and lower snowpack is well-settled, strong, and consolidated.

Snowpack depths are reaching 250 cm at treeline.

Weather Summary

Monday Night

Cloudy with light snowfall, accumulation 5-20cm. Higher amounts possible on the eastern end of the region. Wind moderate to strong northwest. Treeline temperature 0 °C. Freezing level 1400 m.

Tuesday

Clearing with isolated flurries, accumulation 1-3cm. Wind light to moderate north. Treeline temperature -5 °C. Freezing level 400 m.

Wednesday

Mainly cloudy. Wind moderate northeast. Treeline temperature -12 °C.

Thursday

Mix of sun and cloud. Wind moderate northeast wind. Treeline temperature -11 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully evaluate steep lines for wind slabs.
  • Wind slabs are most reactive during their formation.

Avalanche Problems

Wind Slabs

Recent snowfall combined with wind switching direction is promoting the formation of new wind slabs on a variety of aspects.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2