Bollettino valanghe

South Rockies

Avalanche Canada
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Pericolo valanghe

Wed
Thu
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato
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Non aggiornato — questo bollettino è scaduto 4 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Avalanche danger will increase through the day with warming and sun.

Conditions will deteriorate sooner than expected if a strong crust does not form overnight. Plan your trip accordingly.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2

    On high- alpine, north aspects, where dry, loose snow may persist, wind slabs remain possible.

  • Cornices

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

    Cornices are more likely to fall as the temperature rises and solar input strengthens.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Very Likely
    Dimensione
    1–2

    Wet loose avalanches are most likely during periods of direct solar input and as temperatures rise later in the day.

Confidence

Moderate

  • We are uncertain due to a limited number of field observations.
  • We are uncertain about how the timing or intensity of warming will affect the snowpack.

Avalanche Summary

Numerous wet loose avalanches up to size 2 were reported over the weekend.

We suspect natural loose wet avalanches will continue on steep, sun-exposed slopes during the afternoons, with a possibility of occasional cornice failures as well. Isolated wind slabs may be primed for human triggering on high north-facing slopes.

Snowpack Summary

Rising freezing levels and strong sun will weaken the snowpack throughout the day.

A melt-freeze crust is expected on the surface on all but northerly alpine terrain, where 20 to 40 cm of dry snow sits atop a crust. Some lower elevation areas below treeline may not experience an overnight refreeze and remain moist or isothermal.

A weak layer of facets above a hard crust is buried 50 to 70 cm deep. This layer hasn't produced avalanches in over a week.

Facets exist at the base of the snowpack in shallow areas.

Weather Summary

Monday Night
Clear skies. 40 km/h west ridgetop wind. Treeline temperature 6 °C. Freezing level 3100 m.

Tuesday
Sunny. 30 km/h southwest ridgetop wind. Treeline temperature 7 °C. Freezing level 3200 m.

Wednesday
Mostly cloudy. 4 to 5 mm of rain at treeline. 20 km/h east ridgetop wind. Treeline temperature 5 °C. Freezing level 3000 m.

Thursday
Mix of sun and clouds. 5 to 15 cm of snow. 30 km/h north ridgetop wind. Treeline temperature -5 °C.


More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Think carefully about your exit plan from the backcountry because avalanche danger is expected to increase throughout the day.
  • Avalanche danger will increase as the surface crust breaks down.
  • Travel early on sun-exposed slopes before cornices weaken with daytime warming.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.

Regioni coperte