Bollettino valanghe

Sea To Sky

Avalanche Canada
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Pericolo valanghe

Thu
Fri
Alta quota
2 · Moderato
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 5 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

There's still a bit of winter hanging on in the alpine. Cornices yet to drop, dry snow yet to shed in a wet loose cycle, maybe even a stubborn wind slab or two. Pack sunglasses, not blinders!

Problemi valanghivi

  • Wind Slabs

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

    Wind slabs may still be triggerable on north facing, alpine slopes less affected by recent sun and warming.

  • Cornices

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

    Large, fragile cornices exist. Be aware of overhead hazard, and stay back from overhanging cornices on ridgelines.

  • Loose Wet

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

    Slushy, isothermal snow conditions can emerge on sun-facing slopes during the heat of the day. Plan your route with this dynamic in mind to avoid getting surprised by difficult travel and rising wet loose avalanche danger.

Confidence

High

  • We have a good understanding of the snowpack structure and confidence in the weather forecast.

Avalanche Summary

Avalanche activity has quieted since the weekend warmup, but several more natural wet loose avalanches up to size 2.5 were observed in the Whistler area again on Monday. This was focused on west aspects above 2000 m. Ski cutting produced several size 1.5 releases.

On the weekend, wet loose activity was reported at all elevations to size 2.5. In addition, numerous cornice falls and wind slab avalanches were reported.

Snowpack Summary

Spring-like melt-freeze cycles now characterize a daily evolution of surface conditions on all but north-facing slopes above 2000 m, where 10 to 20 cm of dry snow may still be found.

A crust/facet layer from late March sits 20 to 80 cm deep. It isn't presently a concern but perhaps gives cornice falls from high north aspects some chance of triggering a slab.

A thick crust sits 80-100 cm deep. Near Whistler, some facets have been reported around this crust. The snowpack below is moist, but well settled and strong.

Weather Summary

Tuesday Night
Clear skies. 10 km/h west ridgetop wind. Treeline temperature 0 °C. Freezing level 1600 m.

Wednesday
Sunny. 10 km/h northwest ridgetop wind. Treeline high temperature 2 °C. Freezing level to 1800 m.

Thursday
Sunny. 10 km/h east ridgetop wind. Treeline high temperature 6 °C. Freezing level to 2500 m.

Friday
Sunny before clouding over near end-of-day. 5 to 20 km/h southeast ridgetop wind, increasing. Treeline high temperature 7 °C. Freezing level to 2700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully evaluate steep lines for wind slabs.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Rocks will heat up with daytime warming and may become trigger points for loose wet avalanches.
  • Limit exposure to steep, sun exposed slopes, especially when the solar radiation is strong.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.

Regioni coperte