Bulletin d’avalanche

South Coast

Jan 17 – 18, 2017Avalanche Canada
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Archivé · expiré 10 years ago

Danger d’avalanche

Wed
Thu
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré

Points saillants

Warm wet weather continues. Where it rains, watch out for loose wet snow (or wet slabs in the alpine); where it snows, watch out for storm slabs.

Problèmes avalancheux

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2
    If we see heavy rainfall, the snow will become loose and wet.
  • Wet Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    Watch for rain saturating old wind slabs at the highest elevations in the alpine.

Confidence

Moderate - Timing, track, or intensity of incoming weather system is uncertain

Weather Forecast

Warm wet weather continues. Ridge top temperatures have been fluctuating but most precipitation has been falling as rain at all elevations. WEDNESDAY: Still more rain (30-50mm). Winds moderate gusting strong southwesterly. Alpine temperatures to +4 ; freezing level dropping slightly to 1900m. THURSDAY: A mix of snow and rain (20mm water equivalent). Winds light gusting to moderate from the southwest. Freezing level 1300m and alpine temperatures to +2 Celsius. FRIDAY: Unsettled weather with occasional rain or snow (5mm water equivalent). Winds light - moderate from the east. Freezing level 1500m and alpine high temperatures to +4 Celsius.

Avalanche Summary

No new observed.

Snowpack Summary

The rains have begun to saturate the snowpack up to alpine elevations. This includes a widespread melt-freeze crust which formed over the weekend on most aspects and elevations at treeline and below. In the same elevation band, a thick crust can be found 5-10cm below the surface, which has kept the snowpack quite stable. Higher up in the alpine, old wind slabs from last week could remain reactive on steeper unsupported terrain, especially if loaded by new snow or saturated by rain. The mid and lower snowpack are well settled and stable.

Régions couvertes