Bollettino valanghe

Jasper

Dec 25 – 26, 2018Parks Canada
Vedi sulla mappa
Archiviato · scaduto 8 years ago

Pericolo valanghe

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

In sintesi

Play safe and give yourselves lots of time to return home early for some Christmas cheer. Merry Christmas one and all. (TT)

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2.5
    Moderate to strong south west winds have created firm windslabs in the alpine and exposed treeline slopes.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–3.5
    This layer now sits under a meter of snow, any terrain that has not had previous activity on this layer should be given a wide berth.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1.5–4
    Several recent large avalanches have been the result of the entire snowpack failing on or near the ground due to the weak snowpack structure surrounding this interface.

Weather Forecast

Little change expected in over the holidays, forecasted winds will tamper Sunday night as a SW flow will settle in for the next few days. Temperatures will remain cool with daytime alpine highs of -10. Inversions can be expected with slightly warmer temps in the alpine.A detailed mountain weather forecast is available from Avalanche Canada.

Snowpack Summary

Moderate to strong south west winds continue to load lee slopes at tree line and above. The Dec. 11th persistent weak layer has been buried 50 to 100cm and is ripe for human triggering. The deep persistent weakness lingers near the ground in the depth hoar and facets.

Avalanche Summary

Recent avalanche control (Dec 21) produced consistent size 2-2.5 avalanches running to roadside. Previous to the control work, a large natural avalanche cycle occurred primarily failing on the Dec 11 weak layer. Most notably is a large, possibly cornice triggered size 3.5, which ran nearly full run out, on the Churchill (north and south) paths.

Confidence

Due to the number of field observations

Regioni coperte