Bollettino valanghe

South Coast

Dec 4, 2018Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 8 years ago

Pericolo valanghe

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

In sintesi

Change is in the air with forecast warming and sunshine set to promote surface instabilities on Tuesday.

Problemi valanghivi

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Cornices have likely formed along many alpine ridgelines. These can fail under the weight of a person or group. Cornices weaken under the influence of sunshine and warm temperatures.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–1.5
    Rising temperatures and strong sunshine will destabillize surface snow and promote loose wet avalanche activity on sun-exposed slopes on Tuesday. Loose wet slides may occur naturally or with a human trigger.

Confidence

Moderate - Timing or intensity of solar radiation is uncertain

Weather Forecast

Monday night: Clear skies. Light northeast winds.Tuesday: Sunny with some low cloud. Light northwest winds. Alpine high temperatures increasing to around 0 as freezing levels rise to 1500 metres, increasing overnight.Wednesday: Sunny. Light northeast winds. Alpine high temperatures around +3 with freezing levels reaching 2200 metres.Thursday: Sunny with scattered cloud. Light northeast winds. Alpine temperatures around +2 with freezing levels still hovering near 2200 metres.

Avalanche Summary

No avalanches have been reported. Please submit any observations you have to the Mountain Information Network here.

Snowpack Summary

The warm storm early last week produced over 200 mm of precipitation that mostly fell as rain. This rain washed away much of the snowpack at lower elevations. The highest alpine terrain in the region more likely received heavy snowfall during the storm. This snowfall, paired with extreme winds out of the south/southwest is likely to have produced cornice growth along many ridgelines.Alpine areas near Squamish have the most snow, with around 70 cm of settled snow on the ground. In these areas there may be a crust lower in the snowpack, however it is likely now well bonded to the overlying storm snow. It is thought that there is insufficient snow for avalanches below 1500 m.

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