Bollettino valanghe

Waterton Lakes

Feb 7 – 10, 2016Parks Canada
Vedi sulla mappa
Archiviato · scaduto 11 years ago

Pericolo valanghe

Sun
Mon
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
1 · Debole
Apri la mappa completa

In sintesi

High winds arrived on Friday & Saturday, but brought only a little new snow. Watch for avalanche hazard to increase rapidly with sustained above-freezing temperatures early next week.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2
    New snow and extreme Westerly winds have and built Wind Slabs in unusual areas: these may include lower than usual in start zones, and in typically wind-sheltered terrain.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2
    This problem is expected to develop early next week with warm temperatures. It may exist on all aspects, however solar aspects will be the most suspect.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    2–3
    Facets sit atop at crust buried around a meter deep. This layer generally requires large triggers, but will increase in sensitivity during periods of warm temperatures. Another persistent weak layer still exists about 50cm deep in isolated areas

Weather Forecast

Cloudy on Saturday with continued strong-extreme Westerly winds. These remain strong Sunday, easing to light through Monday. Sunday & Monday look mainly clear. Temperatures fall this afternoon, then rise slowly through Sunday, approaching zero late evening. By Monday, many forecast models predict temperatures well above freezing at most elevations.

Snowpack Summary

5-10cm of recent snow in higher terrain has formed Wind Slabs, which may be found in usually sheltered locations, due to extreme W winds Friday night. Buried below are older wind slabs, more difficult to trigger. Down 50 cm is a weak layer in isolated areas, and 1m deep is a faceting rain crust. Sensitivity of these will rise with temperatures.

Avalanche Summary

Several small Wind Slab avalanches were observed on Saturday.

Confidence

Freezing levels are uncertain

Regioni coperte