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Archived

Avalanche Forecast

Feb 10th, 2023–Feb 11th, 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
2: Moderate
The avalanche danger rating below treeline will be moderate
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

Regions: Akamina, Crowsnest North, Crowsnest South.

Pay attention to the direction of the wind as you travel through wind exposed areas.

Confidence

Moderate

Avalanche Summary

On Wednesday there were reports of explosives controlled windslab avalanches to size 2. As well there was a report of an explosives controlled size 2.5 persistent slab avalanche at treeline 50 cm deep running on a layer of facets sitting on a crust that formed mid January.

As the wind continues to blow the coming days, wind slab avalanches will be the main concern.

Please continue to share any observations or photos on the Mountain Information Network.

Snowpack Summary

Up to 30 cm of new snow early in the week has now been redistributed by predominantly west and southwest winds. This likely sits on previously formed wind slabs. A melt-freeze crust can be found below 2100m elevation band. It may be on the surface on windward slopes and buried 35 to 60 cm in lee terrain.

The middle of the snowpack is consolidated. Weak faceted grains exist near the base of the snowpack.

The average snowpack depth is 130 cm. Up to 200 cm can be found in wind-loaded areas.

Weather Summary

Friday Night

Mainly cloudy with clear periods. Moderate west ridgetop wind. Treeline temperature around -7 ºC.

Saturday

Mainly cloudy with sunny periods. Light to moderate west ridgetop wind. Treeline temperature around -4 ºC. Freezing level rising to 1400m.

Sunday

Mostly cloudy with isolated flurries. Light to moderate west and southwest ridgetop wind. Treeline temperature around -3 °C. Freezing level around 1600m.

Monday

Mainly cloudy with scattered flurries. Moderate southwest ridgetop wind. Treeline temperature around -2 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Avalanche Problems

Wind Slabs

Recent snow and moderate winds have built new wind slabs over older wind slabs. Expect these slabs to be most reactive in leeward terrain like ridgetops and cross-loaded features, and where a firm bed surface exists.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2