Bollettino valanghe

Jasper

Feb 18 – 20, 2025Avalanche Canada
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Archiviato · scaduto 2 years ago

Pericolo valanghe

Thu
Fri
Alta quota
2 · Moderato
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole

In sintesi

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

Assess wind loading on open slopes before committing to terrain as windslabs may remain reactive to human triggers.

Problemi valanghivi

  • Wind Slabs

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

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    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

Numerous Loose dry avalanches and one cornice fall that did not produce a slab were observed on steep solar aspects on the 17th.

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

In the alpine and treeline there has been widespread wind affect. 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. At the bottom of the snowpack the early season crusts are faceting and breaking down but continue to persist along with large depth hoar. The snowpack at tree line is 70-130 cm in the Icefields area and 50 cm in the Maligne area.

Weather Summary

Tuesday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: High -12 °C.

Light ridge wind.

Wednesday

Cloudy with sunny periods.

Precipitation: Nil.

Alpine temperature: Low -17 °C, High -8 °C.

Ridge wind southwest: 10 km/h.

Thursday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: Low -9 °C, High -7 °C.

Ridge wind west: 15-25 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.

Regioni coperte