Avalanche forecast

Jasper

Nov 30 – Dec 1, 2020
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Avalanche danger

Tue
Wed
Alpine
3 · Considerable
Treeline
2 · Moderate
Below
1 · Low
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Highlights

Extreme winds have scoured the alpine to rock on windward slopes. The best snow for skiing can be found in sheltered locations at tree line and below.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    1–2

    Extreme SW winds in the alpine is scouring windward slopes. Be cautious of local wind influences where reverse or cross loading may have occurred.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–3

    The Nov. 4 is down about 50cm at tree line (2000m) and breaking down. Be careful around "thin to thick" areas where deep slabs could be triggered.

Weather Forecast

Parker Ridge Area:

Monday: Mainly cloudy with isolated flurries. Alpine temperature: High -6 °C. Ridge wind southwest: 20 km/h gusting to 45 km/h. Freezing level at valley bottom.

Tuesday: Sunny with cloudy periods. Precipitation: Nil. Alpine temperature: Low -15 °C, High 2 °C. Ridge wind west: 10-20 km/h. Freezing level at valley bottom.

Snowpack Summary

On going extreme SW winds are stripping snow from windward slopes in the alpine and sending it to Saskatchewan. Soft snow can still be found in specific sheltered locations at tree line and below.  Snow depth at the Bald Hills at tree line is around 80cm with the Nov 4 crust down 50cm and breaking down. The snowpack is supportive to skis.

Avalanche Summary

No new avalanches were observed on Sunday in the Bald Hills Zone. On Saturday explosive control at Parkers slabs resulted in two size 2.5 avalanches from the wind loaded storm snow. A few other thin slabs were noted in steep alpine terrain.

Confidence

Freezing levels are uncertain on Wednesday

Regions covered