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Archived

Avalanche Forecast

Feb 9th, 2022–Feb 10th, 2022
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
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: Jasper.

Elevated freezing levels expected into Thursday with minimal refreeze overnight.This  may trigger deeper instabilities.

follow 511 for most up to date road closures.

Weather Forecast

Thursday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: High -2 °C.

Mostly light ridge wind occasionally gusting to 50 km/h.

Freezing level: 1900 metres.

Friday

Sunny

Precipitation: Nil.

Alpine temperature: Low -10 °C, High -5 °C.

Mostly light ridge wind occasionally gusting to 55 km/h.

Freezing level at valley bottom.

Snowpack Summary

Moist surface snow with rising freezing levels and warm temperatures persisting into Thursday. Strong SW winds have stripped exposed alpine to rock. We expect wind slabs in crossloaded features and into tree line.  Several December faces layers can be found in the midpack. Facets and depth hoar are formed near the ground.

Avalanche Summary

Road Patrol did not observe any natural activity today. On Tuesday one large wind slab avalanche was noted on Fluted Peak on a south facing feature.

Confidence

Freezing levels are uncertain

Avalanche Problems

Wind Slabs

Watch for wind slabs in cross-loaded features and further down the slopes than usual due to wind intensity. Our team is more concerned about this problem in the tree line elevation band.

  • Pay attention to overhead hazards like cornices which could trigger slabs.
  • Use caution in lee and cross-loaded terrain near ridge crests.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Loose Wet

With rising freezing levels watch for wet loose avalanches. Minimal overnight freeze expected on Wednesday night, do not count on recovery of the surface snow on Thursday.

  • If triggered, loose wet sluffs may step down to deeper layers resulting in larger avalanches.
  • Use extra caution on solar slopes if the snow is moist or wet.

Aspects: All aspects.

Elevations: Below Treeline.

Likelihood: Possible

Expected Size: 1 - 1.5

Persistent Slabs

Warm temperatures may increase reactivity of this layer.  Persistent slabs sit over different weak layers depending on elevation & aspect. Investigate these layers before committing as there is a lot of variability dependent on aspect and elevation.

  • Dig down to find and test weak layers before committing to a line.
  • Avoid shallow snowpack areas where triggering is more likely.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1.5 - 3.5