Bulletin d’avalanche

Jasper

Mar 23 – 24, 2022
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Archivé · expiré 5 years ago

Danger d’avalanche

Fri
Sat
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

A rapid drop in temperatures will likely freeze shut all the moist snow tree line and below. New snow and strong winds will have built fresh wind slabs.

Problèmes avalancheux

  • Wind Slabs

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

    Increasing winds and snow will build new wind slabs in the alpine and possibly down into exposed tree line.

Weather Forecast

Thursday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: High -8 C.

Ridge wind west: 10-30 km/h.

Freezing level at valley bottom.

Friday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: Low -10 C, High -4 C.

Ridge wind southwest: 10-20 km/h.

Freezing level: 1700 metres.

Snowpack Summary

Freezing levels were around 2300m on Wednesday afternoon. The top 10cm of snow at tree line was moist. Strong SW winds and new snow building are building wind slabs in the alpine and exposed tree line.

Avalanche Summary

Over the last 48hrs there has been a widespread wet loose avalanche cycle mostly tree line and below off steep, rocky, and shallow features. Also several wind slabs up to size 2 have been noted in the alpine. One wet loose avalanche on Tuesday caused by rockfall on Polar Circus caught two climbers resulting in serious injures.

Confidence

Due to the number and quality of field observations

Régions couvertes