Boletín de aludes

South Rockies

Avalanche Canada
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Peligro de aludes

Mon
Tue
Alta montaña
3 · Notable
Límite del bosque
3 · Notable
Bajo el límite
2 · Moderado
Desactualizado: este boletín caducó 4 months ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

High freezing levels and sun will lead to dangerous avalanche conditions through the day.

Conditions will deteriorate sooner than expected if a strong crust does not form overnight.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2

    Recently formed wind slabs may still be reactive to rider triggering, and could fail naturally during periods of strong sun or warm temperatures.

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1.5–2.5

    Cornices are more likely to fall as the temperature rises and the sun comes out.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Very Likely
    Tamaño
    1–2

    Wet loose avalanches will occur during calm, sunny periods. Avoid being underneath slopes in direct sun.

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

As strong westerly winds increased on Thursday, several natural wind slab avalanches up to size 2 were observed from alpine terrain. Cornices were actively growing as well. (See MIN here)

Strong sun and warming throughout the weekend will increase the likelihood of both natural and human-triggered avalanches. Be increasingly cautious as the snowpack warms up and weakens.

Snowpack Summary

20 to 50 cm of recent snow continues to settle atop either a melt-freeze crust at upper elevations or wet snow lower down. In exposed areas, the new snow has been redistributed by strong westerly winds.

A weak layer of facets above a hard crust is buried 50 to 70 cm deep. This layer hasn't produced avalanches since last week's warm weather.

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

The snowpack continues to melt at lower elevations.

Check out this Conditions Update video for tips on managing the current spring conditions.

Weather Summary

Saturday Night
Clear skies. 30 km/h west ridgetop wind. Treeline temperature -1 °C. Freezing level 2100 m.

Sunday
Sunny. 40 km/h west ridgetop wind. Treeline temperature 2 °C. Freezing level 2800 m.

Monday
Mostly sunny. 40 km/h west ridgetop wind. Treeline temperature 5 °C. Freezing level 3000 m.

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

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.
  • Travel early on sun-exposed slopes before cornices weaken with daytime warming.
  • Investigate the bond of the recent snow before committing to your line.

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