Bulletin d’avalanche

Jasper

May 1 – 2, 2013Parks Canada
Voir sur la carte
Archivé · expiré 13 years ago

Danger d’avalanche

Fri
Sat
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
Ouvrir la carte complète

Points saillants

If temperatures rise higher than predicted on Thursday, the avalanche danger will increase on all aspects and elevations.  Powder conditions still exist on northerly aspects but not for long!

Problèmes avalancheux

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3
    Large cornices are looming.  On failure, deep releases may run far into the valley bottom.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2
    The recent storm snow will be sluffing off steep terrain as point release avalanches. Alpine and ice climbers should keep this in mind.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3
    40cm of storm snow has fallen since Saturday. West and NW winds have moved this snow onto lee aspects. South facing aspects are particularly likely trigger areas where the bonding of the new snow to the old melt freeze crust is weakest.

Weather Forecast

Day time temperatures will progressively rise to the mid-twenties by Sunday.  Overnight temperatures will break the freezing mark by Saturday.  Winds will ease and the sun will shine.  Finally!!

Snowpack Summary

40cm of snow has fallen in the Icefields area since Saturday. This has formed pockets of windslab at and above treeline. Bonding of this slab on Southerly slopes should be considered suspect. Below the new snow a thick melt freeze crust layers cap isothermal snow below. Sun crusts extend high into the alpine on South facing slopes.

Avalanche Summary

No reports of avalanches today.

Confidence

The weather pattern is stable on Thursday

Régions couvertes