Bulletin d’avalanche

Jasper

Jan 25 – 26, 2022
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Archivé · expiré 5 years ago

Danger d’avalanche

Wed
Thu
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Watch out for lingering wind slabs in the alpine.

Problèmes avalancheux

  • Wind Slabs

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

    Wind slabs are likely still lingering in spots. Watch out for hollow sounding snow where a hard wind slab sits over weak facets.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3

    The slab problem overlies different layers depending on elevation and aspect. Lower elevations has a rain crust 40-60cm down with weak facets on top reacting to tests. Above 1950m, a buried surface facet layer down 20-30cm is the primary concern.

Weather Forecast

Tuesday

Cloudy with sunny periods.

Precipitation: Nil.

Alpine temperature: High -9 C.

Ridge wind west: 15 km/h.

Freezing level at valley bottom.

Wednesday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: Low -12 C, High -8 C.

Ridge wind west: 15-30 km/h.

Freezing level at valley bottom.

Snowpack Summary

Widespread wind affect and stripping in alpine from Sunday. A thin sun crust is likely on the surface on solar aspects into the alpine. The midpack is mostly supportive around the Icefields and unsupportive around Maligne. Weak facet layers are down ~20-30cm and a crust is down 40-60cm below 1950m, faceting but still reactive in snowpit tests.

Avalanche Summary

No new avalanches were reported on Monday. Sunday's Icefield's patrol noted a low elevation wet loose surface avalanche cycle with numerous size 1's.

Confidence

Due to the number and quality of field observations

Régions couvertes