Bollettino valanghe

Jasper

Mar 5 – 6, 2023Avalanche Canada
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Archiviato · scaduto 4 years ago

Pericolo valanghe

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

In sintesi

Don't let the sunshine and beautiful weather lure you into more aggressive terrain. Despite the lack of natural avalanche activity, skier triggering of the deep persistent instability is still possible and consequences potentially severe. Good skiing can still be found in sheltered locations.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2

    Previous moderate to strong winds from the SW have formed wind slabs in open areas.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1.5–3.5

    The bottom of the snow pack is inherently weak with well developed Facets and Depth Hoar. Natural avalanches continue to step down to this layer resulting in large avalanches.

Weather Summary

Sunday and Monday are calling for cold temperatures and minimal winds. Alpine highs around -10C to -15C. Freezing level at valley bottom.

Detailed weather forecasts from Avalanche Canada: https://avalanche.ca/weather/forecast

Terrain and Travel Advice

  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.

Confidence

Moderate

Avalanche Summary

A number of large avalanches up to size 3 have been observed and reported in the past week. The snowpack is very sensitive to small inputs of new snow, loading, and changes in temperature. These avalanches are mostly from the alpine but are running through all elevation bands.

Don't forget to post avalanche observations to the MIN.

Snowpack Summary

5 to 15cm of new snow since March 1st overlies 20 to 40cm of low density facetted crystals in sheltered areas. There is extensive wind effect at tree line and above from previous SW winds.

This is sitting on top of a generally weak mid and lower snowpack. Facets and depth hoar linger at the base of the snowpack with the height of snow varying from 60 to 160cm.

Regioni coperte