Avalanche forecast

Jasper

Dec 16 – 17, 2020
View on map
Archived · expired 6 years ago

Avalanche danger

Thu
Fri
Alpine
3 · Considerable
Treeline
2 · Moderate
Below
1 · Low

Highlights

Strong winds and falling snow throughout the day will create fresh wind slabs.

Avalanche problems

  • Wind Slabs

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

    Forecasted light snow and moderate winds may form new slabs on leeward and cross-loaded terrain features. These slabs will probably not bond well to the current snow surface.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1.5–3

    Be cautious of thick to thin snowpack areas being likely trigger locations.

Weather Forecast

Parker Ridge Area

Wednesday: Mainly cloudy with isolated flurries. Precipitation: Trace. Alpine temperature: High -9 C. Ridge wind SW: 20 km/h gusting to 45 km/h.

Thursday: Cloudy with sunny periods and isolated flurries. Precipitation: Trace. Alpine temperature: Low -12 C, High -7 C. Ridge wind west: 10-30 km/h.

Snowpack Summary

Strong winds are creating wind slabs in the alpine and down into tree line. About 10cm of new snow, where not wind affected, is overlying surface hoar up to 2500m and widespread faced snow at all elevations. The snowpack is generally supportive despite facets and depth hoar at the base of the snowpack. The snowpack is 40-150cm.

Avalanche Summary

No patrol yesterday. On Monday natural avalanches (loose dry and wind slabs) up to sz 2 were observed from all elevations.

Confidence

Regions covered