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Avalanche Forecast

Dec 7th, 2019–Dec 8th, 2019
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: Jasper.

New snow will make for great skiing! Caution is advised as snow coverage over hazards such as rocks and trees may be thin. Snowpack variability will require careful assessment of every run.

Weather Forecast

The storm ends Saturday night replaced by clear cold air and northerly winds.

Sunday: Temps drop with a northerly flow.  Mix of sun and cloud.

Monday: Mix of sun and clouds.  Temps from -5 to -10 and light northerly ridge winds.

Tuesday: Mix of sun and cloud.  Seasonal temperatures and light Westerly winds.

Details here: Mountain Weather Forecast.

Snowpack Summary

40 to 50 cm of snow has fallen since Tuesday on a mix of surfaces; ground, surface facets, surface hoar, and previous wind slab and/or hard wind pressed surfaces. Moderate SW winds are building soft wind slabs at ridge tops. The Oct. and Nov. crusts are present in the mid and lower snowpack. Basal facets are weak and are changing into depth hoar.

Avalanche Summary

No new avalanches reported or observed by field teams today.

Confidence

Due to the number and quality of field observations on Sunday

Avalanche Problems

Loose Dry

Up to 40 cm of unconsolidated new snow could cause significant sluffing in entrained ice climbing features.

  • 874
  • If triggered dry loose point releases can form deeper deposits in terrain traps.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Wind Slabs

New soft windslabs have formed in the lee areas. The distribution at treeline is more isolated.

  • Use caution in lee areas in the alpine and treeline. Recent storm snow has formed wind slabs.
  • Use caution on open slopes and convex rolls

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2.5

Persistent Slabs

Avalanches possible where wind has stiffened the new snow into a slab.

  • Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.

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

Elevations: Treeline, Below Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2