Bollettino valanghe

Jasper

Dec 24 – 25, 2023Avalanche Canada
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Archiviato · scaduto 3 years ago

Pericolo valanghe

Tue
Wed
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole

In sintesi

Ski quality has improved but be careful on windloaded slopes. Yesterdays Northerly winds have created wind slabs in unusual locations due to reverse loading. The base of the snowpack is still weak & early-season hazards remain hidden just below the surface.

Happy Holidays from the Jasper Team!

We're hoping for some MIN's for x mas :)

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–1.5

    Previous strong winds have stripped exposed alpine and tree-line terrain, creating hard wind slabs in cross-loaded and lee features. These winds switched from Southwest to Northwest on Friday, reverse loading features where snow remained.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–2.5

    You must keep this basal layer on your radar as triggering is possible in some features, like approaching or moving between pitches on ice climbs. Be cautious in steep terrain if you find yourself standing on the surface and not wallowing in facets, that's the problem slab.

Confidence

Moderate

Avalanche Summary

No road patrol today

Minor sloughing in steep alpine terrain and a small pocket of windslab from cornice trigger being reported on Dec 23 .

Snowpack Summary

5cm of new snow sits on a weak Melt-Freeze crust below 1900m on solar aspects. The snowpack is 45-80cm deep and is weak and facetted. Previous strong winds have stripped exposed alpine and tree-line terrain, creating hard wind slabs in cross-loaded and lee features. Basal weaknesses are a combo of large facets and chains of depth hoar.

An Ice Climbing Conditions report is available here.

Weather Summary

The Mountain Weather Forecast is available at Avalanche Canada https://avalanche.ca/weather/forecast

Sunday in the Icefields

Sunny with cloudy periods. Alpine temperature High of -9 °C with ridgetop wind southwest 10 km/h.

Monday

Cloudy with sunny periods and isolated flurries. Trace amounts of precipitation. Alpine temperature: Low -13 °C, High -8 °C with ridgetop wind southwest: 15 km/h.

Terrain and Travel Advice

  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Early season avalanches at any elevation have the potential to be particularly dangerous due to obstacles that are exposed or just below the surface.

Regioni coperte