Bollettino valanghe

Banff Yoho Kootenay

Nov 22 – 23, 2013Parks Canada
Vedi sulla mappa
Archiviato · scaduto 13 years ago

Pericolo valanghe

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

In sintesi

Pay attention to local winds there is a lot of snow available for transport.  We expect fresh wind slab development overnight and tomorrow morning and may see some avalanche activity associated with wind loading. (LP)

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3
    Moderate to strong NW winds are forecasted for the region overnight which will add to the wind slab condition in the alpine.  We may see an increase in avalanche activity associated with wind loading.  Winds should taper through the day.

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3
    This layer was less active today, but there is still little confidence in this interface in the Sunshine area.  Aside from the one observation in the Bow Summit area, it seems have become less active elsewhere.

Weather Forecast

Overnight moderate to strong NW winds are forecasted for the region.  Winds should taper and  temperatures will rise through the day on Friday.  By the weekend, alpine temperatures will be near -3C, with light winds and a mix of sun and cloud.

Snowpack Summary

Thirty to 50 cm of low density storm snow was received earlier in the week.  Sunshine has reported lots of reactive wind and storm slabs while north of Lake Louise wind effect not  been as wide-spread. The mid pack is slowly gaining a bit of strength. The Oct rain crust persists at ground level in some alpine terrain.

Avalanche Summary

A couple of new observations from Observation Peak where two size 2 avalanches were reported in cross-loaded gully features, SE/SW aspects.  Bow Summit had a size 3 reported click here for the photo.  For a video of the size 3 explosive triggered slide in Delerium Dive yesterday click here (thanks to Sunshine Snowsafety team). It was on NE aspect.

Confidence

Due to the quality of field observations

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