Bulletin d’avalanche

Jasper

Feb 14 – 15, 2019Parks Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

Fri
Sat
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

Don't break someone's heart on Valentines Day. Stay smart and pick your lines appropriately.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Wind effect in the alpine and tree line. In the right spot you could trigger a windslab.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–3.5
    This problem is still present and could be triggered from shallow snowpack areas. See MIN report.

Weather Forecast

A ridge of high pressure is along the rockies providing warmer and stable weather until Thursday evening when a frontal system moves in  bringing some precipitationThursday: Mix of sun and cloud. Ridge winds from the SE at 10 km/h. Alpine temps:  High -7C.A detailed mountain weather forecast is available from Avalanche Canada.

Snowpack Summary

Some wind affect noted in the alpine and at tree line. Due to the cold temperatures there seems to be no slab over the persistent weakness sitting down 35-45cm (surface hoar, crusts, and/or facets). The bottom of the snowpack is structurally weak especially in shallow snowpack areas, consisting primarily of facets/depth hoar.

Avalanche Summary

One notable windslab in the alpine stepping down to ground yesterday. Loose dry avalanches up to size 2 have been naturally triggered in the facetting snowpack in steep shallow areas.On Feb 7th, a size 2 deep persistent slab was triggered by skiers in the Maligne area on a W aspect, 1950m, on a 30 degree slope (see MIN).

Confidence

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

Régions couvertes