Bollettino valanghe

Kootenay Boundary

Dec 17 – 18, 2014Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 12 years ago

Pericolo valanghe

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

In sintesi

If the riding is good, the snowpack stability might not be.

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    2–4
    Old facet/crust weaknesses may still be sensitive to triggers on slopes that aren't bridged by a thick near-surface crust. Generally shady aspects in the high alpine.

  • Loose Dry

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Dry surface snow is poorly bonded to the underlying hard crust and may sluff off in steep terrain.

Confidence

Fair - Due to the number of field observations

Weather Forecast

Mainly cloudy with around 5 cm of fresh snow on Thursday, 10 cm on Friday and another couple expected on Saturday. Freezing levels are expected to gradually rise from valley bottom on Thursday to 1600 m or higher by Saturday afternoon. Winds should remain light but gusty from the south.

Avalanche Summary

There we no new reports of avalanches on Tuesday and Wednesday morning.

Snowpack Summary

Light flurries are burying large surface hoar sitting on or near a thick hard supportive rain crust that extends as high as 2100 m. Critical slopes are high elevation north aspects where facets or buried surface hoar from earlier in the month may be lurking under dense storm slabs, and older facet/crust weaknesses may be persisting. Recent snowpack tests at 2050 m in a NW aspect in Kootenay Pass produced moderate sudden results down 35 cm under the late-November crust and down 79 cm on facets above the early-November crust. Meanwhile in the Southern Purcells, snowpack tests last weekend gave easy sudden planer results on well preserved surface hoar where it was found down 30 cm on high north aspects.

Regioni coperte