Boletín de aludes

Northwest Coastal

Apr 24 – 25, 2014Avalanche Canada
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Archivado · caducó 12 years ago

Peligro de aludes

Sat
Sun
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Lo esencial

Due to a lack of field observations, we are starting to transition to bulletins without Danger Ratings. Check out this Blog Post for more information on spring ratings.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–3
    Forecast new snow overnight may develop new wind slabs in the alpine and at treeline.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1–2
    Snow may become moist or wet during periods of day time warming. Loose wet snow may release naturally from steep terrain.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    3–7
    Deeply buried persistent weak layers continue to be a concern for isolated hard to predict avalanches. Avalanches releasing on these deep layers may be more likely during periods of strong solar radiation, or when there is no overnight freeze.

Confidence

Fair - Intensity of incoming weather systems is uncertain on Friday

Weather Forecast

Overnight and Friday: Expect 5-10 cm overnight as the freezing levels drop down to 700 metres and the winds become light from the East. Overcast with flurries during the day with the freezing level rising to 1500 metres. Winds becoming moderate Southeast in the evening.Saturday: Unsettled winter conditions are expected to continue. Light snow with moderate Southeast winds. Freezing levels at 800 metres overnight and rising to 1400 metres during the day.Sunday: Continued cloudy with light snow and moderate Southwest winds. Freezing level may not drop below 1000 metres overnight.

Avalanche Summary

A couple of size 3.0-3.5 deep persistent slab avalanches have been reported that are suspected to have occurred in the past week. We are no longer receiving professional daily reports for the region so public observations are really appreciated right now. If you are out in the mountains, send your observations to [email protected]

Snowpack Summary

Highly variable spring conditions are being reported in the region. At lower below-treeline elevations the snowpack is typically wet and isothermal. It has not been refreezing overnight and is melting quickly. Between roughly 1000 and 1500m, the snowpack has been undergoing daily melt-freeze cycles. The same conditions can be expected on sun-exposed slopes all the way to mountain-top. On higher elevation north-facing slopes, dry snow likely still exists. Recent strong S through W winds have scoured windward slopes and created wind slabs in leeward slopes. The early February crust/facet layer is typically down 1.5 to 2.5m. A smaller avalanche or a cornice fall may still have the potential to step down to this layer causing very large, destructive avalanches, especially during warm sunny periods.

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