Bollettino valanghe

North Columbia

Apr 21 – 22, 2024Avalanche Canada
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Archiviato · scaduto 2 years ago

Pericolo valanghe

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

In sintesi

Watch for wind loaded pockets in leeward features at upper elevations.

Expect loose avalanches when the sun hits fresh snow in steep terrain.

Problemi valanghivi

  • Wind Slabs

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

    Recent snow and wind have formed fresh wind slabs in lee terrain features at upper elevations. Wind slabs may be especially reactive where they sit over a crust.

  • Loose Dry

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

    New snow will be especially sensitive to seeing the sun for the first time.

Confidence

Moderate

Avalanche Summary

A small handful of avalanches were reported in the alpine late last week, including:

  • a remotely skier-triggered size 2 failing on moist snow below the crust, in which another skier was caught but did not sustain any injury

  • a skier-controlled size 1 wind slab below an convex roll

  • a natural size 2 storm slab on a steep, west-facing moraine feature

  • a cornice failure did not propagate any weak layers on the slope below

Snowpack Summary

Up to 20 cm of new snow sits over a widespread melt-freeze crust on all but high north-facing alpine terrain, where snow is dry and wind affected.

Weather Summary

Sunday night

Up to 5 cm of new snow at upper elevations. 30 to 50 km/h northwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1200 m.

Monday

A mix of sun and cloud. <20 km/h northwest ridgetop wind. Treeline temperature -1 °C. Freezing level 2000m.

Tuesday

A mix of sun and cloud. 10 to 30 km/h southwest ridgetop wind. Treeline temperature +3 °C. Freezing level 2300m.

Wednesday

Sunny. 10 to 30 km/h southwest ridgetop wind. Treeline temperature +4 °C. Freezing level 2400m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Brief periods of sun could quickly initiate natural avalanche activity.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Regioni coperte