Bulletin d’avalanche

South Coast Inland

Dec 25 – 26, 2022Avalanche Canada
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Archivé · expiré 4 years ago

Danger d’avalanche

Tue
Wed
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

Strong wind, rising freezing levels and ongoing precipitation will keep avalanche hazard elevated.

Problèmes avalancheux

  • Wind Slabs

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

    Steady south-southwest wind has and continues to impact flurries and loose snow.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5

    Watch for rising freezing levels and rain-on-snow and turning surface snow moist and saturating the snowpack. In the case of wet avalanches, the first 24 hours of rain-on-snow are the most hazardous as large, destructive avalanches are most likely to occur.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1.5–2.5

    The winter snowpack is not as deep as usual, and along with a cold and dry early winter, the lower snowpack consists of weak, unconsolidated facets and depth hoar crystals. With weak basal layers, a cautious approach to large open terrain features is required especially around rocky or thin areas.

Confidence

Low

Avalanche Summary

No notable recent avalanches have been reported, however poor weather and road closures have limited observations.

Please continue to post your observations and photos to the Mountain Information Network.

Snowpack Summary

In the last 48 hours, around 15 cm fresh snow fell with steady south-southwest wind. The new snow overlies a facetted and unconsolidated layer which formed during the recent cold weather.

The winter snowpack is not as deep as usual, and along with a cold and dry early winter, the lower snowpack consists of weak, unconsolidated facets and depth hoar crystals. Snowpack depths average 50-200 cm at treeline.

Weather Summary

Saturday Night

Flurries, 5 cm. Ridgetop low temperature -9 C. Southwest wind 25-35 km/hr.

Sunday

Flurries begin around noon, 5-10 cm by end of day. Ridgetop high temperatures -2 C. Southwest wind 20-40 km/hr. Freezing level rising towards 1500 m.

Monday

Wet flurries and snow, 10 cm overnight plus 10 cm through the day. Ridgetop high temperature 0 C. Southwest wind 20-40 km/hr. Freezing level peaking above 1800 m.

Tuesday

Flurries and snow, 10 cm. Ridgetophigh temperature -1 C. Southwest wind 30-60 km/hr. Freezing level 1500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be especially cautious as you transition into wind affected terrain.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.
  • The more the snow feels like a slurpy, the more likely loose wet avalanches will become.

Régions couvertes