Bulletin d’avalanche

Jasper

Mar 8 – 9, 2018Parks Canada
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Archivé · expiré 9 years ago

Danger d’avalanche

Fri
Sat
Alpin
1 · Faible
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

The first warming trend of late winter has begun so expect increased reactivity in the afternoon.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Expect windslabs in the alpine and at open treeline. The cold has reduced slab conductivity, and the probability for long propagations. Caution is still warranted on exposed or extreme terrain features.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–3
    A cold, facetting, and structurally weak slab up to 80cm thick overlies faceted crystals (well developed in shallow areas). Low elevations will present as a loose dry avalanche problem.

Confidence

Timing or intensity of solar radiation is uncertain

Weather Forecast

Weather over the next week should remain a stable pattern. Cool overnight and temps rising to single digits over the day. Chance of scattered flurries with up to 10cm on Friday. Temps and freezing levels will rise into the weekend with increased solar radiation, so bring sunscreen.

Snowpack Summary

Surface facetting has weakened much of the upper snowpack through the forecast region. The upper snowpack is generally 50 to 80 cm, over the seasonally persistent instability. Wind slabs and wind effect in open areas in the alpine and treeline elevations.

Avalanche Summary

Some solar triggered loose dry avalanches to sz 2 throughout the forecast zone. Yesterday ridgetop windslab avalanches were triggered with small explosives near Marmot peak.

Régions couvertes