Bollettino valanghe

Kootenay Boundary

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

Pericolo valanghe

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

In sintesi

Warming and solar radiation will drive the avalanche danger in the coming days. Watch for conditions that change throughout the day, and be cautious of overhead hazards.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–1.5
    New snow and strong winds from Friday night and Saturday have formed wind slabs in upper elevation lee terrain. Although they're expected to gain strength quickly, I'd remain cautious around ridge crests and in gullies.

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3
    Warming and solar radiation may also cause large cornices to fail. Cornice failures may be dangerous by themselves, but they could also trigger a large avalanche on the slope below.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely - Very Likely
    Dimensione
    1–2
    Warming and solar radiation over the next few days are expected to trigger loose wet avalanches, especially in steep, sun-exposed terrain. Loose wet avalanches can be pushy and entrain mass quickly.

Confidence

Moderate - Timing or intensity of solar radiation is uncertain

Weather Forecast

A ridge of high pressure will develop for the forecast period bringing sunny skies and light ridgetop winds. The freezing level will hover around 2600m on Monday, 2800m on Tuesday and 3500m by Wednesday.

Avalanche Summary

No new avalanches have been reported although I'm sure there was a round of wind slab activity on Saturday in response to Friday night's snow and wind. I'm sure the new snow will be quick to settle and gain strength in the coming days. Loose wet avalanches and cornice falls are expected with warming and solar radiation forecast for this week. Although less likely, warming may also trigger unexpectedly deep and destructive slab avalanches failing on weaknesses which formed earlier in the season.

Snowpack Summary

New snow and wind from Friday night and Saturday formed relatively small wind slabs in upper elevation lee terrain. Depending on aspect and elevation, the new snow likely overlies a melt-freeze crust or settled storm snow from earlier in the week.Numerous other melt-freeze crusts exist in the upper snowpack from rain, sun, and warming during the spring season. The mid and lower snowpack are generally well-settled and strong; however, weaknesses deep within the snowpack have the potential to "wake-up" in isolated terrain with forecast warming and solar radiation.

Regioni coperte