Bollettino valanghe

Northwest Inland

Apr 4 – 5, 2017Avalanche Canada
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Archiviato · scaduto 9 years ago

Pericolo valanghe

Thu
Fri
Alta quota
2 · Moderato
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole

In sintesi

Cornices have the potential to trigger avalanches on the slopes below. Be alert to changes with elevation.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Strong winds and light amounts of snow will form fresh wind slabs in the lee of exposed terrain. Most slabs avalanches in the past week have been triggered by cornices.

Confidence

Moderate - Intensity of incoming weather systems is uncertain

Weather Forecast

TUESDAY NIGHT: 5-10 cm of snow, 60 km/h south wind, and freezing level up to 1400 m.WEDNESDAY: Isolated light flurries, 50 km/h south wind, and freezing level around 1200 m.THURSDAY: Mostly cloudy with isolated flurries, light southeast wind, freezing level up to 1300 m after an overnight freeze.FRIDAY: Mostly cloudy, light southeast wind, freezing level up to 1300 m after an overnight freeze.

Avalanche Summary

Over the past few days, several size 1-2 wind slabs were triggered by cornice falls in the Howsons. No other new avalanches have been reported in the region since last week, when 2 large cornice triggered slabs were reported in the Microwave area. Slab avalanches are most likely at higher elevations that haven't been through daily melt-freeze cycles.

Snowpack Summary

Strong winds with light amounts of new snow will form fresh wind slabs in exposed terrain. Rain and warm temperatures up to 1400 m will soften the snow at lower elevations. Crusts may be found at higher elevations, particularly on sun-exposed slopes. The February crust and facet layer was reported to be down 75-90 cm in the Houston Telkwas sled area. The deep persistent weak layer of facets and/or a crust that were buried early in the winter are still lingering near the bottom of the snowpack.

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