Bollettino valanghe

Sea To Sky

Avalanche Canada
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Pericolo valanghe

Mon
Tue
Alta quota
3 · Marcato
Limite del bosco
2 · Moderato
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

Hippity hop, it's getting hot to the tippity top of the mountains.

Large cornice falls have been reported recently. As temperatures continue to rise, give cornices a wide berth.

Problemi valanghivi

  • Cornices

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

    Cornices are large and fragile. Avoid travelling on or under them.

  • Loose Wet

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

    Strong solar activity and high freezing levels through the day will increase the likelihood of loose wet activity. Pay close attention to signs of warming such as sticky wet snow, dripping from the trees, and rollerballs.

Confidence

High

  • We are confident the snowpack will rapidly weaken with the forecast weather.
  • We have a good understanding of the snowpack structure and confidence in the weather forecast.
  • We are confident the likelihood of avalanches will increase with the forecast weather.

Avalanche Summary

On Friday, explosive avalanche control produced multiple large (size 2-2.5) cornice avalanches. There are also reports of extensive older loose wet avalanche debris in the Sky Pilot area.

On Thursday, explosive avalanche control produced a large (size 2) storm slab avalanche over a convex roll. While this avalanche was relatively shallow, it had wide propogation and ran far.

On Wednesday around Whistler, ski cutting produced a few small (size 1) storm slab avalanches.

Snowpack Summary

Warm daytime temperatures and clear nights have formed a surface crust in many areas, with wet or slushy surface snow elsewhere.

Up to 20 cm of new snow has accumulated at treeline and above over the past week, accompanied by moderate to strong southwest wind.

60 to 90 cm of mostly settled snow overlies the thick and hard mid-March crust below about 2200 m, and old wind-affected snow above 2200 m. Around Whistler, some facets have been reported around this crust.

Many operators are commenting on how large the cornices have formed this year.

The snowpack below the mid-March crust is wet but well settled and strong.

Weather Summary

Saturday Night
Clear skies. 20 km/h west ridgetop wind. Treeline temperature 2 °C. Freezing level 2200 m.

Sunday
Sunny. 10 km/h southwest ridgetop wind. Treeline temperature 5 °C. Freezing level 2600 m.

Monday
Mostly sunny. 30 km/h southwest ridgetop wind. Treeline temperature 6 °C. Freezing level 2500 m.

Tuesday
Mix of sun and clouds. 1 to 5 cm of snow. 30 km/h west ridgetop wind. Treeline temperature -1 °C. Freezing level 1400 m.

Warming weather will change the game, click this link for great terrain and travel advice.


More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid steep, sun-exposed slopes when the air temperature is warm or when solar radiation is strong.
  • The more the snowpack warms up and weakens, the more conservative your terrain selection should be.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Use extra caution for areas that are experiencing rapidly warming temperatures for the first time.

Regioni coperte