Bulletin d’avalanche

Jasper

Apr 3 – 4, 2021
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Archivé · expiré 5 years ago

Danger d’avalanche

Mon
Tue
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

The forecasted 10cm of snow could offer some good skiing at higher elevations.

Stay vigilant for windslabs building with  steady SW winds.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2.5

    New and building wind slabs can be found in lee features near ridge crests, and cross-loaded gullies.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–3

    When in the Whistlers/Portal and Maligne Regions identify and assess the bond at this mid-pack layer. This interface shows strength in field tests, but there is concern for wide, spatial variability over large and/or connected features.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5

    Cooler temps on Sunday may limit this problem, but with a poor overnight freeze expected, keep it on your radar.

Weather Forecast

Sunday: A mix of sun and cloud with isolated flurries. Precipitation: Trace. Alpine temperature: High -5 C. Mostly light ridge wind occasionally gusting to 40 km/h. Freezing level: 1500 metres.

Monday: Cloudy with sunny periods. Precipitation: Nil. Alpine temperature: Low -10 C, High -4 C. Ridge wind west: 10 km/h. Freezing level: 1800 metres.

Snowpack Summary

Widespread variability on the surface with 10-15cm of new snow and variable winds forming wind slabs on a variety of aspects at TL and ALP. Deteriorating travel conditions below 1900m. The snowpack shows strength and good bonding in field tests but "feels" weak in shallow snowpack regions like Whistlers/Portal creek and Maligne zones.

Avalanche Summary

Use the Mountain Information Network to report your field observations and contribute to the bulletin. Friday's Icefield patrol noted no new natural but the visibility was poor. From the vantage point on top of Whistler mountain also noted no new activity but visibility was very poor.

Confidence

Forecast snowfall amounts are uncertain

Régions couvertes