Bulletin d’avalanche

Glacier

Mar 19 – 20, 2022
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Archivé · expiré 5 years ago

Danger d’avalanche

Mon
Tue
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré

Points saillants

There have been many recent incidents of skiers getting surprised by reactive slabs on steep, solar features.

Assess your line carefully and avoid convex rolls until this problem stabilizes.

Problèmes avalancheux

  • Persistent Slabs

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

    Although natural avalanche activity has been tapering, the Mar 11th suncrust is proving touchy to skier triggering on steep solar slopes.

    Small surface hoar from Mar 7th may also be lingering on Northerly aspects.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2

    This afternoon's power-flurry will freshen up the loose dry problem in steep terrain.

Weather Forecast

This evening's power flurry (up to 10cm) will ease later tonight through Sunday as a ridge moves through the province.

Tonight: Flurries, trace accumulations. Low -12*C, Freezing level (fzl) 500m. Moderate W wind.

Sun: Mix of sun and cloud. High -10*C, fzl 1000m, mod W wind

Mon: Flurries (trace), low -10*C, high -6*C, fzl 1500m, mod SW wind

Snowpack Summary

Incoming new snow adds to the 45-70cm of settled snow received since Mar 11th. Solar aspects treeline and below have a series of buried suncrusts (the most recent - Mar 11th and 7th - may sandwich weak, sugary snow between them). On shaded aspects, spotty small surface hoar may be buried down ~70cm (March 7), down 90cm (Feb 26), and >1m (Feb 15).

Avalanche Summary

A cornice failure on the north side of Mt Cheops triggered a persistent slab lower in the path, sometime in the last 36 hrs.

On Friday, there was a report of a skier involvement in a size 2 slab avalanche in steep terrain in Puff Daddy, and several size 1 slabs in Ursus trees and Rogers Run - all failing on the Mar 11th suncrust.

Confidence

Timing, track, or intensity of incoming weather system is uncertain

Régions couvertes