Bulletin d’avalanche

Jasper

Apr 5 – 6, 2019Parks Canada
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Archivé · expiré 7 years ago

Danger d’avalanche

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

Watch for daytime heating destabilizing the surface snow particularly in the late afternoons.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Westerly and Southwest winds are creating windslabs in high alpine ridgetop isolated terrain particularly on East to Northeast aspects. Watch for local wind influences where this condition could exist on other aspects as well.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Isothermal conditions are occurring on all aspects up to 2100m including North aspects particularly late in the afternoon. Overnight freeze stabilizing the snowpack in the a.m.. Rain at lower elevations can quickly accelerate this process.

Weather Forecast

Friday night will be mainly cloudy with flurries, low -3 C, light SW winds, and freezing level 1700m. Saturday will be clouds, sun, flurries, high -3 C, moderate SW winds, and freezing level 1800m. Sunday will bring sunny periods and flurries, -7 to -4 C, 15 gusting 45 km/hr winds, and freezing level 1800m.

Snowpack Summary

The snowpack is trending isothermal in the afternoons on all aspects up to 2100m including N aspects. This condition tapers off as you ascend. North aspects treeline and above is still a winter snowpack. No windslab exists treeline and below but expect to find it high alpine ridgetops on generally East aspects in isolated terrain.

Avalanche Summary

A team at Hilda shoulder report no new avalanches on Friday. On Thursday, a team at Athabasca pass reports several loose dry avalanches on Northerly alpine aspects. Little recent activity has been noted. Share your observations with the community on the CAA Mountain Information Network

Confidence

Due to the number and quality of field observations

Régions couvertes