Bollettino valanghe

Jasper

Mar 22 – 23, 2014Parks Canada
Vedi sulla mappa
Archiviato · scaduto 13 years ago

Pericolo valanghe

Mon
Tue
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato
Apri la mappa completa

In sintesi

Light winds and snowfall have not added significant load to the snowpack resulting in a lack of recent natural avalanche activity.  Large human triggered avalanches are still likely especially from thin spots and in cross-loaded terrain.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Windslabs are forming in wind prone areas like below lee ridges at treeline and above and cross-loaded gulley features.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–3
    The "drought layer" (Feb 10) has been sensitive in the past week contributing to numerous large avalanches. Pay particular attention to moraines at treeline and cross-loaded features in the alpine.

Weather Forecast

Light snow is forecast to continue through the weekend with accumulation up to 10 cm.  The next significant pulse of snow is expected mid-week.  Daytime temperatures will moderate slightly into next week rising to the freezing level  in the valley bottoms, cold overnight temperatures will continue.  Winds will remain light primarily from the SW.

Snowpack Summary

The ~40 cm of snow received last week has settled with little wind effect in most areas.  Previous surfaces including sun crusts on solar aspects and wind slab  below ridgelines and cross-loaded gulley features  are buried and are hard to discern.  The Feb10th drought layer is 100 cm deep and is the greatest concern for triggering. 

Avalanche Summary

No new observations today with observers in the Maligne and a helicopter flight in the Cavell Area. Several large avalanches were observed earlier this week. on the Feb 10th layer.  These avalanches exhibited wide propagation primarily on big East facing alpine terrain.

Confidence

The weather pattern is stable on Sunday

Regioni coperte