Bollettino valanghe

Purcells

Avalanche Canada
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Pericolo valanghe

Fri
Sat
Alta quota
1 · Debole
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 4 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Cooler weather will freeze the recently wet snow into a hard crust, reducing avalanche danger. Continue giving cornices a wide berth near ridgelines.

Problemi valanghivi

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1.5–2.5

    Cornices remain large and they could release unexpectedly during the heat of the day.

Confidence

Moderate

  • We are uncertain due to a limited number of field observations.

Avalanche Summary

Many small wet loose and slab avalanches were observed during warm weather over the past few days. They've been observed on all aspects and elevations.

Looking forward, avalanche activity is unlikely anywhere a thick and hard crust is on the snow surface. Continue to travel safely near cornices and limit exposure on sun-exposed slopes if the snow is slushy.

Snowpack Summary

Cool weather will freeze previously wet snow into a hard melt-freeze crust. A dusting of snow may accumulate over this crust over the day. The snow surface may melt on sun-exposed slopes and at lower elevations if sunny skies prevail.

Numerous hard crusts are found in the top half of the snowpack. In the high alpine near Invermere, a layer of weak facets may persist above one of these crusts, found 30 to 80 cm deep.

The snowpack continues to melt below treeline.

Weather Summary

Wednesday Night
Partly cloudy with isolated flurries. 1 to 2 mm of precipitation as snow or rain at treeline. 40 km/h northwest ridgetop wind. Treeline temperature -3 °C. Freezing level 2500 m dropping to 1600 m by morning.

Thursday
Mostly cloudy with isolated flurries. 1 to 3 cm of snow. 30 km/h northwest ridgetop wind. Treeline temperature -6 °C. Freezing level 1600 m.

Friday
Mostly cloudy. 20 km/h north ridgetop wind. Treeline temperature -7 °C. Daytime freezing level rising to 1500 m.

Saturday
Mix of sun and clouds with isolated flurries. 1 to 2 cm of snow. 20 km/h north ridgetop wind. Treeline temperature -6 °C. Daytime freezing level rising to 1600 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Periods of low danger may be a good time to increase your exposure.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.
  • Be alert to conditions that change with elevation, aspect, and exposure to wind.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Limit exposure to steep, sun exposed slopes, especially when the solar radiation is strong.

Regioni coperte