Bulletin d’avalanche

Sea To Sky

Mar 29 – 30, 2024Avalanche Canada
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Archivé · expiré 3 years ago

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Watch for changing conditions as you shift aspect and elevation.

Reactivity remains in wind affected areas, while sunshine may produce wet avalanche activity on south facing slopes.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2

    Wind slabs can be found at higher elevations. Expect reactivity as slabs sit over a crust.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2

    Loose wet avalanches are most likely on steep, sun affected slopes. Avalanches may initiate easily on the smooth crust below.

Terrain and Travel Advice

  • Wind slabs may be poorly bonded to the underlying crust.
  • Minimize exposure to sun-exposed slopes when the solar radiation is strong.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Confidence

High

Avalanche Summary

On Thursday slabs up to size 2 were produced within the storm snow from explosive control work. Riders produced size 1-1.5 slabs.

Reactivity is expected to linger in wind affected features moving forward and on south facing slopes in areas that see strong sunshine.

Snowpack Summary

15-25 cm of recent snow has fallen above a widespread crust present below 2000 m. At treeline and above, winds have created deeper deposits on north and east facing slopes. Surface snow may become moist on steep sun affected slopes.

The facet/crust layer that produced large avalanches during early March is buried 150-250 cm deep, and is now considered unreactive.

Weather Summary

Friday Night

Mostly clear skies with no snow expected. 10 km/h northerly ridgetop wind. Freezing levels remain around 1500 m near Squamish and other coastal areas, and may drop to 800 m near Whistler.

Saturday

A mix of sun and cloud. 15-30 km/h northwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1600 m.

Sunday

Mostly sunny. 40-60 km/h northwest ridgetop wind. Freezing level rises to 3000 m by afternoon, raising treeline temperatures to +10 °C.

Monday

Freezing levels remain around 3000 m overnight and throughout Monday. 40-60 km/h northwest ridgetop wind. Treeline temperatures to +10 °C.

More details can be found in the Mountain Weather Forecast.

Régions couvertes