Bollettino valanghe

Kootenay Boundary

Mar 22 – 23, 2017Avalanche Canada
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Archiviato · scaduto 10 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

The avalanche danger will gradually increase through the end of the week into the weekend as forecast precipitation amounts begin to accumulate

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    2–3
    At upper elevations where the recent rain crust is not as thick and strong, there is still potential to trigger deeper buried weak layers.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    As the freezing level rises and/or the sun comes out the surface snow will become increasingly wet or moist and may begin to sluff from steep terrain.

Confidence

Moderate - Intensity of incoming weather systems is uncertain on Friday

Weather Forecast

THURSDAY:  Mix of sun and cloud / Light south wind / Alpine temperature -4 / Freezing level 1300mFRIDAY: Flurries, accumulation 5-10cm / Moderate southwest wind / Alpine temperature -3 / Freezing level 1300mSATURDAY: Flurries, accumulation 5-10cm / Moderate southwest wind / Alpine temperature -4 / Freezing level 1400m

Avalanche Summary

Reports from Tuesday indicate snowballing and loose snow avalanches to size 1 from steep terrain on all aspects from tree line and below.

Snowpack Summary

Last weekend rain soaked the upper snowpack for a second time in a week all the way to mountain tops. Subsequent cooling temperatures then formed a 10-30cm rain crust. In many parts of the region above the 1500m there may now be 10-15cm of new snow sitting on top of the crust. Below the crust expect to see moist or wet snow. The late-February facet / surface hoar interface (70-120 cm deep), the mid-February crust (90-130 cm deep), and basal facets in shallow snowpack areas may still be present at upper elevations and may still be reactive and become a concern as surface crusts break down with daytime warming.

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