Bulletin d’avalanche

Jasper

Apr 4 – 5, 2019Parks Canada
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Archivé · expiré 7 years ago

Danger d’avalanche

Sat
Sun
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
2 · Modéré
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Points saillants

A little bit of fresh snow has improved ski conditions. Watch for daytime heating destabilizing the surface snow.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Winds increasing with recent 10-15cm of snow overlying previous crust are potentially forming thin windslabs on lee aspects at upper treeline and higher locations from Southerly winds.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5
    Daytime heating can destabilize the snowpack particularly in late afternoons depending on the degree of overnight freeze. Rain at lower elevations can accelerate this process.

Weather Forecast

Friday will be a trace of snow and -1 C, mainly cloudy, SW 10-30km/hr winds, and freezing level 2200 meters. Saturday will be cloudy with sun and isolated flurries, trace of snow, and Alpine temperatures Low -5 C and High -2 C, with freezing level 1800 meters. Sunday may bring 13cm of snow and gusting 50km/hr winds.

Snowpack Summary

Last night's 5-10cm of fresh snow covers the recent melt-freeze crust. Below treeline the snowpack is trending isothermal in the afternoons depending on the overnight freeze. Higher elevations maintains softer snow with on-going multiple melt-freeze cycles. On north facing alpine slopes up to 15cm of surface snow overlies previous old dry surfaces.

Avalanche Summary

A team at Athabasca pass reports several loose dry avalanches on Northerly alpine aspects. No local patrol on Wednesday or Thursday and nothing new reported. Little recent activity has been noted. Share your observations with the community on the CAA Mountain Information Network

Confidence

Forecast snowfall amounts are uncertain on Sunday

Régions couvertes