Bollettino valanghe

Northwest Inland

Feb 18 – 19, 2012Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 15 years ago

Pericolo valanghe

Mon
Tue
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2
    Increasing winds will redistribute surface snow into wind slabs on lee slopes.

Confidence

Fair - Timing of incoming weather is uncertain on Sunday

Weather Forecast

Sunday: Light snowfall / moderate southwest winds increasing to strong in the evening / freezing level @ 500m Monday: light snowfall / moderate southwest winds / freezing level @ 700m Tuesday: moderate snowfall / strong southwest winds / freezing level @ 700m

Avalanche Summary

No new avalanches have been reported.

Snowpack Summary

About 15cm of snow that fell over the past week sits over a variety of old surfaces: melt-freeze crusts exist on all aspects at lower elevations as well as on south-facing slopes higher up, and well-settled powder is found on shaded aspects in the alpine. Weak surface hoar crystals (size 3-4mm) are sandwiched between the old surfaces and the newer snow. The distribution of the surface hoar seems to be up to treeline on all aspects and on sheltered features in the alpine. This upper snow pack structure will be the big thing to watch as the overlying slab develops. I expect to see gradually increasing reactivity in the surface hoar interface with incremental loading and higher winds forecast for this week. Check out our Forecaster's Blog for some thoughts on incremental loading. The mid and lower snowpack is generally well settled and strong.

Regioni coperte