Bollettino valanghe

Northwest Coastal

Apr 22 – 23, 2018Avalanche Canada
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Archiviato · scaduto 8 years ago

Pericolo valanghe

Tue
Wed
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
Apri la mappa completa

In sintesi

Avalanche danger will increase as the temperatures rise throughout the week.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Lingering wind slabs may still be reactive to human triggers in wind affected terrain at treeline and above.

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    2–3.5
    Sunshine and warming temperatures will increase the likelihood of cornice fall.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    When the sun comes out it will quickly weaken the surface snow and cause loose wet avalanching on steep solar slopes.

Confidence

Low - Due to the number of field observations

Weather Forecast

MONDAY: Mostly cloudy. Strong southwest wind. Alpine temperature +5. Freezing level 1600 m.TUESDAY: Mix of sun and cloud. Moderate west wind. Alpine temperature +3. Freezing level 1400 m. WEDNESDAY: Sunny. Light west wind. Alpine temperature +10. Freezing level 3000 m.

Avalanche Summary

Several very large deep persistent slab avalanches(size 3-4) which were triggered by cornice failures and several natural wind slabs up to size 2.5 were reported near Bear Pass on Saturday. Avalanche reports have been limited due to very few information sources this time of year. If you have been out, please post your observations on the Mountain Information Network. (MIN)

Snowpack Summary

Cornices are large and when they fail there is the potential to trigger large avalanches on deeply buried weak layers. Lingering wind slabs may still be reactive to human triggers on leeward slopes below ridgetops.In the south of the region, two layers of surface hoar are buried early-March and mid-March are approximately 70-100 cm deep and most prominent on north to east aspects. Further north, these layers are around 40 cm deep.Below these March layers the mid-pack is generally well-settled and strong. However in the far north of the region there are weak sugary facets near the bottom of the snowpack.

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