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Archived

Avalanche Forecast

Feb 21st, 2020–Feb 22nd, 2020
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
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Jasper.

There are dramatic differences in the snowpack from the Icefields to Whistler creek areas. Whistler area is significantly less supportive to skiers and one large avalanche was triggered by skiers four days ago off Indian Ridge. Use caution!

Weather Forecast

Saturday will be a mix of sun and cloud with isolated flurries, 5cm of snow overnight, -8 C, and West winds 15 km/h gusting to 45 km/h. Sunday will bring 7 cm of snow, and -15 to -5 C with light winds.

Find the Alberta Rockies weather synopsis here: Mountain Weather Forecast

Snowpack Summary

Variable strength windslab on most surfaces treeline and above. Solar crusts on steep South aspects up to 2200m. Pronounced cornice development on northerly aspects and cross loaded features treeline and above. The mid-pack is bridging the deeper basal facets and depth hoar in some locations but there is allot of variability.

Avalanche Summary

No new avalanches reported from field team in the Circus valley near Portal creek. 

Confidence

The weather pattern is stable

Avalanche Problems

Wind Slabs

Wind slabs are widespread through the region with new and previous loading in lee features. Sensitivity will vary with local loading and wind patterns. Winds continue to blow strong. 

  • Watch for pockets of hard windslab in steep alpine terrain features..
  • Assess start zones carefully and use safe travel techniques.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2.5

Deep Persistent Slabs

Triggering could occur from shallow snowpack areas or from large loads such a cornice failure. The consequences of triggering will likely be severe!

  • Avoid steep convexities or areas with a thin or variable snowpack.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1.5 - 3.5