Bollettino valanghe

Purcells

Apr 11 – 12, 2016Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 10 years ago

Pericolo valanghe

Wed
Thu
Alta quota
Senza grado
Limite del bosco
Senza grado
Sotto il limite
Senza grado
Apri la mappa completa

In sintesi

Spring Conditions. Forecast cloud cover, cooler air temperatures, and dropping freezing levels will all contribute to decrease the likelihood and size of avalanches. Avoid slopes that do not develop a solid crust overnight.

Problemi valanghivi

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    2–5
    The likelihood of natural cornice falls will drop as the cloud cover increases and the freezing levels drop.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3
    Loose wet avalanche activity is expected to decrease with forecast cloud cover and descending freezing levels. Watch for slopes that do not re-freeze overnight.

  • Wet Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    3–6
    Wet slab avalanche activity is expected to decrease with forecast cloud cover and descending freezing levels. Watch for slopes that do not re-freeze overnight.

Weather Forecast

High cloud developing overnight with freezing levels dipping down to 2000 metres by morning. Mix of sun and cloud on Tuesday morning, becoming cloudy with moderate southwest winds in the afternoon. Freezing levels dropping to 1500 metres by Wednesday morning with moderate southwest winds and 3-5 cm of new snow above 1500 metres. Cloudy with light winds during the day on Wednesday. Mix of sun and cloud on Thursday with overnight freezing down to 1300 metres.

Avalanche Summary

Natural avalanches up to size 3.0 were reported from Sunday in the central Purcells on alpine features with solar exposed aspects. Some glide cracks were also reported releasing up to size 2.5 during the heat of the day.

Snowpack Summary

The snow surface is currently going through a typical spring melt-freeze cycle on all aspects and at all elevations, except possibly high true-north slopes which could be holding onto cold snow. A moist/wet, isothermal, and rapidly melting snowpack exists on all aspects below around 1500 m and probably even higher on solar aspects. The strength (thickness) of the surface crust and how quickly it breaks down during the day are important factors to focus on.

Regioni coperte