Bulletin d’avalanche

Jasper

Feb 19 – 20, 2014Parks Canada
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Archivé · expiré 13 years ago

Danger d’avalanche

Wed
Thu
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
1 · Faible
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Points saillants

The main concern is the buried surface hoar, facet, crust combo layer found predominantly at tree line and sub alpine elevations  'Whumphing' is being reported from this persistent weak layer (PWL).

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Recent southerly winds have created new windslabs. Caution is warranted with lee and crossloaded features.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    The interface between rapidly settling storm snow and the previous surface is characterized by crusts. facets and surface hoar. New slabs are touchy in specific terrain - particularly steep, lee aspects at treeline and sub alpine elevations.

Weather Forecast

Some snow showers (10cm) is forecast for the southern end of our forecasting area and is accompanied by light southerly winds. This should do little to change our present avalanche hazard.

Snowpack Summary

Recent snowfall overlies a surface hoar, surface facet and crust combo, found predominantly at tree line and sub alpine elevations  A relatively hard mid-pack is providing bridging strength over the weak basal facet layer. Below tree line has a supportive (albeit shallow) mid-pack.

Avalanche Summary

Yesterday - there was no natural activity observed between Jasper and The Big Bend and only limited results with the Avalauncher at Parkers Ridge (tree line elevation).

Confidence

Forecast snowfall amounts are uncertain

Régions couvertes