Bulletin d’avalanche

Jasper

Feb 19 – 21, 2025Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

Fri
Sat
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible

Points saillants

Good skiing exists in areas that have been sheltered from the wind.

Quite a bit of variability exists in the upper snowpack with different layers of wind slabs, crusts and facets. Be diligent about assessing each individual slope.

Problèmes avalancheux

  • Wind Slabs

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

    Recent winds have created wind slabs in the alpine and treeline. These windslabs may be sitting on top of facets or the January 30th crust.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    2–3

    A variety of crusts with Depth Hoar above and below exist at the bottom of the snowpack. These layers are going to be with us for a long time and pose a low probability, high consequence situation if triggered.

Confidence

High

Avalanche Summary

A naturally triggered size 2 wind slab was observed at Bald Hills.

Numerous Loose dry avalanches on solar aspects have occurred recently.

There was a size 1 wind slab skier accidental reported on the back side of Parkers Ridge on the 14th. Check out the MIN on the main map for more information.

Marmot Basin was able to produce a size 2 cornice triggered avalanche with explosives on the 14th where the cornice chunks entrained loose dry snow.

Snowpack Summary

There is widespread surface hoar where there has been no wind. The Icefields has seen extensive wind effect even into treeline while the Bald hills have had noticeably less. In sheltered areas there is roughly 15cm of snow overlying the January 30th layer which is a temperature crust or wind slab depending on the area. The midpack is weak and faceted. The bottom of the snowpack is comprised of large depth hoar and the early season crusts have all but broken down.

Weather Summary

Wednesday

Cloudy with sunny periods.

Precipitation: Nil.

Alpine temperature: High -7 °C.

Ridge wind southwest: 10 km/h.

Thursday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: Low -8 °C, High -5 °C.

Ridge wind west: 15-30 km/h.

Friday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: Low -8 °C, High -6 °C.

Ridge wind southwest: 15 km/h gusting to 45 km/h.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected terrain.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.

Régions couvertes