Bulletin d’avalanche

Waterton Lakes

Apr 24 – 26, 2014Parks Canada
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Archivé · expiré 12 years ago

Danger d’avalanche

Fri
Sat
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

Watch for precip, 10cm at higher elevations, but rain at lower elevations, especially Sat. Remember, even small amounts of solar heating or rain can weaken snow quickly to cause an increase in the avalanche hazard beyond the posted danger ratings.

Problèmes avalancheux

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2
    Even short bursts of solar heating can rapidly affect the snow this time of the year. With mild temperatures in the forecast, watch for rain to affect the snow at lower elevations.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–4
    Solar heating has weakened the upper snowpack treeline and below. With continued warming, a skier traveling through a thin spot or a large load hitting a slope such as a cornice fall or smaller avalanche could potentially trigger these serious slabs.

Weather Forecast

Scattered flurries on Thursday but freezing level still up to 2000m.  Accumulation might but up to 5cm. Friday the sun might pop out for periods with freezing levels climbing to 2300m. Saturday another system will move over the area with snowfall of up to 10cm. Freezing level will still be around 2400m however.

Snowpack Summary

No snowfall over the last few days and warm temps with cold nights has created a new crust to ridgetop on all solar aspects and high up on N aspects as well. The deeply buried February Facets and early season Basal Facets remain weak and will likely wake up with significant and sustained heating.

Avalanche Summary

A few isolated loose moist avalanches on all aspects and elevations with daytime heating.

Confidence

Due to the number of field observations

Régions couvertes