Bollettino valanghe

Northwest Coastal

Apr 10 – 11, 2016Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 10 years ago

Pericolo valanghe

Tue
Wed
Alta quota
Senza grado
Limite del bosco
Senza grado
Sotto il limite
Senza grado
Apri la mappa completa

In sintesi

Spring conditions typically means hazards are greatest during the heat of the afternoon. Start early, finish early.

Problemi valanghivi

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–5
    The timing of failures is unpredictable. Unsupported sections are extra suspicious. Dropping chunks are a hazard in themselves and they may also trigger a slab avalanche on the slopes below. Watch and limit your exposure to overhead hazards.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–4
    Loose wet sluffing is likely on sun exposed slopes with sunshine or warm afternoon temperatures. The intensity of the sun and warmth directly effects he size and length; wet slabs are also possible, especially at lower elevations.

Weather Forecast

Skies will cloud over Monday morning with a weak disturbance arriving overnight. Because the disturbance leads with a cold front, freezing level should lower to around 1000m overnight Monday and then hover between 1000 and 1500m through Wednesday. Winds will back to the south but remain in the light to moderate range. Precipitation forecast calls for 5 to 15mm by Tuesday evening -- rain at mid and lower elevations, snow at higher elevations.

Avalanche Summary

No new observations reported.Cornices are also expected to be weak right now. Wet Loose response to solar rad & daytime warming. Wet slab possible lower elevations. TL & BTL likely just melting out gracefully,

Snowpack Summary

Moist or wet snow exists on all aspects at all elevations; the only possible exception is high elevation northerly aspects in Northern areas. Any surface crusts that form overnight will quickly break down during the day. The snowpack's strength is directly related to the thickness and strength of these crusts. Where layers remain in the snowpack, they are generally bonding. A widespread crust/facet layer from early February and depth hoar at the bottom of the snowpack (primarily in northerly & inland areas) are dormant. Cycles of melting and refreezing have limited the reactivity of these old layers. However they, or the ground, could potentially once again be the layer for an isolated yet large avalanche with prolonged periods of warming.

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