Bulletin d’avalanche

Jasper

Apr 18 – 19, 2014Parks Canada
Voir sur la carte
Archivé · expiré 12 years ago

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
Ouvrir la carte complète

Points saillants

Daytime heating and direct solar exposure will rapidly increase the avalanche danger.  Plan to be off slopes if moist or wet snow conditions are encountered.  Avalanche control planned on Hwy 93 between Parkers and Weeping Wall late Saturday PM. 

Problèmes avalancheux

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Daytime heating and direct solar radiation will deteriorate the crust by mid afternoon and avalanches are likely after this time. Steep solar aspects have the greatest likelihood.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3
    Shallow rocky areas are likely trigger spots on steeper loaded terrain features.

Weather Forecast

Rain/snow showers to continue this evening and then skies will clear overnight bringing cool temps that will likely develop a crust from treeline to valley bottom.  Mostly clear skies Saturday with warming temperatures.  Similar conditions expect through Monday however overnight temperatures may not be cold enough to develop a significant crust.

Snowpack Summary

Temps peaked well above freezing Friday PM reaching into the alpine. This will create a crust on most aspects to treeline (TL) on solar aspects in the alpine as temps cool overnight. Moist snow below the crust extends into TL. The mid-pack is well bonded and warm. The base is weak facets in most locations. Cornices are large.

Avalanche Summary

2 new sz 2 slab avalanches ~ 50 - 100 cm deep where observed on SW TL aspect in the Icefields area, these went on an old snow interface, likely the Feb 10th layer. Several loose dry releases produced avalanches to sz 1.5 out of steep alpine terrain on SW aspects. Numerous small loose wet avalanches were reported on all aspects to treeline.

Confidence

Freezing levels are uncertain on Saturday

Régions couvertes