Bollettino valanghe

Northwest Inland

Mar 4 – 5, 2015Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 12 years ago

Pericolo valanghe

Fri
Sat
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato
Apri la mappa completa

In sintesi

Avalanche danger is rising with incoming snow and strong winds.

Problemi valanghivi

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–3
    Incoming snow and strong winds are likely to build storm slabs and wind slabs. These may fail naturally or be triggered with the weight of a person. There's also a slim chance of a deeply buried weakness waking up, causing a very large avalanche.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2
    Rainfall below treeline may trigger loose wet avalanches in steep terrain.

Confidence

Fair - Due to the number of field observations

Weather Forecast

5-10 cm snow is expected on Thursday. This is followed by cloudy skies with possible flurries on Friday and Saturday. Strong to gale SW to W winds persist over the next three days. The freezing level is near 1000 m.

Avalanche Summary

A skier triggered an isolated size 1 wind slab in the alpine on Tuesday. Small loose moist avalanches were also observed on steep solar aspects over the last couple of days. Over the weekend, avalanches to size 3 were reported from steep un-skiable south through west facing terrain features and isolated cornice fall produced a few slabs out of extreme terrain. Very thin wind slabs on NE facing alpine features were also observed. Glide cracks are starting to open up too. New snow and wind are likely to create storm slabs and wind slabs which could be triggered naturally, or with the weight of a person.

Snowpack Summary

Incoming snow and strong winds are likely to build wind slabs on lee features, and storm slabs in more sheltered spots. Previous outflow winds created isolated stiff thin wind slabs, which may now be buried under new snow. A variety of other interfaces may be found under the new snow, including a sun crust, an old rain crust, surface hoar, and/or surface facets. At the base of the snowpack, weak facets may be found. Keep an eye out for cornices that could fail.

Regioni coperte