Bollettino valanghe

Jasper

Jan 17 – 18, 2013Parks Canada
Vedi sulla mappa
Archiviato · scaduto 14 years ago

Pericolo valanghe

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

In sintesi

Direct solar radiation is not forecast, but should it occur, the avalanche danger will increase rapidly at all elevations.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–3
    Slabs have formed on a variety of aspects from moderate to strong winds (with extreme gusts).  This condition is more prevalent with increasing elevation.

  • Loose Dry

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2
    Wind and warming temperatures are triggering point releases, most commonly out of steep and rocky terrain.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    2–3
    Surface instabilities such as loose snow and new windslabs  may step down to ground, which means a small avalanche has the ability to become large very quickly.  This will occur more likely in shallow snowpack areas.

Weather Forecast

Cloudy skies, strong NW winds and mild temperatures with freezing levels around 1400m on Thursday.  No precipitation during the day but maybe up to 8 cm overnight Thursday.

Snowpack Summary

Snowpack remains thin and facetted at lower elevations, but is supportive above tree line. Last week's storm snow has buried a surface hoar layer (Jan6) down approx 30cm.  Windslabs have formed on Southwesterly alpine aspects and previous significant snow transport by intense winds.

Avalanche Summary

Basal facet avalanches (both slab and loose) have been observed below treeline today.  Yesterday, numerous size 2 and a few size 3 natural soft and hard slab avalanches were observed in the alpine.  Many of these slides are stepping to ground and running to valley bottom. 

Confidence

Freezing levels are uncertain on Thursday

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