Bollettino valanghe

Northwest Coastal

Avalanche Canada
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Pericolo valanghe

Sun
Mon
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
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Non aggiornato — questo bollettino è scaduto 4 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Avalanche danger will increase through the day with warming and strong sun.

Conditions will deteriorate sooner than expected if a strong crust does not form overnight.

Problemi valanghivi

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1.5–2.5

    Cornices will weaken with daytime warming and solar input.

  • Loose Wet

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

    Wet loose avalanches are most likely during periods of direct solar radiation and as temperatures rise through the day. In areas lacking a solid overnight freeze, avalanche activity may begin much earlier than expected.

Confidence

Low

  • We are uncertain about how the timing or intensity of warming will affect the snowpack.
  • We are uncertain due to a limited number of field observations.

Avalanche Summary

With limited overnight refreezing over the past few nights, daytime warming and strong April sun have continued to trigger natural wet loose avalanches up to size 2.5.

Snowpack Summary

A widespread surface crust is expected to form overnight at treeline and above, with crust thickness and strength varying with the quality of the overnight refreeze. Isolated north-facing areas in high-alpine terrain may still hold pockets of dry, loose surface snow.

Below treeline, a limited or lack of overnight refreeze will result in a moist or isothermal upper snowpack.

With daytime warming and sun, the snowpack will weaken throughout the day.

Weather Summary

Friday Night
Clear skies. 20 km/h southeast ridgetop wind. Treeline temperature 6 °C. Freezing level 2600 m.

Saturday
Sunny. 10 km/h southeast ridgetop wind. Treeline temperature 6 °C. Freezing level 2600 m.

Sunday
Sunny. 10 km/h west ridgetop wind. Treeline temperature 6 °C. Freezing level 2500 m.

Monday
Mix of sun and clouds. 20 km/h west ridgetop wind. Treeline temperature 3 °C. Freezing level 1600 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Think carefully about your exit plan from the backcountry because avalanche danger is expected to increase throughout the day.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.
  • Avalanche danger will increase as the surface crust breaks down.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

Regioni coperte