Bollettino valanghe

Northwest Coastal

Jan 23 – 24, 2014Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 13 years ago

Pericolo valanghe

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

In sintesi

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–3
    Although becoming stubborn, isolated wind slabs below ridge crests may still be sensitive to human triggers.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–3
    Generally small, slow, and often limited to extreme cliffy terrain; however, these dense avalanches can easily knock you off your feet and take you for a ride.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    4–7
    Basal facets, buried surface hoar, and glide avalanches are all expected to become more sensitive to triggering with warm temperatures and solar radiation. Although tricky to pinpoint when and where they might occur, the consequences could be severe.

Confidence

Good

Weather Forecast

Friday and Saturday: Sunny with cloudy periods and valley fog likely. Light winds. Freezing level reaching 3500 m with alpine temperatures close to +10 C, but cooler in valley bottoms. Sunday: Mostly sunny with valley fog likely. Light winds. Freezing level reaching 3000 m with alpine temperatures close to +5 C, but cooler in valley bottoms.

Avalanche Summary

Reports from Wednesday include warm temperatures causing a few natural small loose wet avalanches as well as a Size 3 glide avalanche.

Snowpack Summary

The surface snow is likely undergoing a melt-freeze cycle on all but high elevation shady aspects, while the entire snowpack may even be trending isothermal at lower elevations. On shady aspects, over 20cm of recent storm snow (more on wind-loaded slopes) is settling and bonding well to the previous snow surface, which includes a crust up to treeline elevations. Well preserved surface hoar may be found buried in the upper snowpack on sheltered treeline slopes and below, and has been most active in the northern parts of the region between 900m and 1400m elevation. A well settled mid and lower snowpack may rest on basal facets, especially in thin snowpack areas at higher elevations.

Regioni coperte