Avalanche forecast

Jasper

Dec 4 – 5, 2020
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Archived · expired 6 years ago

Avalanche danger

Sat
Sun
Alpine
2 · Moderate
Treeline
1 · Low
Below
1 · Low
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Highlights

Highly wind effected snowpack in the alpine and exposed treeline make finding soft turns difficult but the views are world class.

Avalanche problems

  • Wind Slabs

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

    Widespread wind effect in the alpine and exposed treeline - highly variable with laminated slabs and bare ground. Be cautious of unsupported slabs.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–2.5

    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

Friday will bring cooling temperatures with ridgetop winds becoming light from the west. High pressure with mild temperatures remaining in place through the weekend with freezing level reaching 2200m Saturday.

Snowpack Summary

Previous winds have stripped the snow from all fetch in the alpine and open tree line creating slabs and crossloading gullies and depressions. Soft snow can still be found in specific sheltered locations at tree line and below. Snow depth at tree line is around 90cm with the Nov 4 crust down 50cm. Solar crust present steep SW terrain.

Avalanche Summary

Evidence of avalanche cycle from yesterday's temp inversion and solar input on specific steep and extreme SW alpine terrain - moist loose and slab up to size 2.

Confidence

Freezing levels are uncertain

Regions covered