Lawinenlagebericht

South Rockies

Avalanche Canada
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Lawinengefahr

Wed
Thu
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
2 · Mässig
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Veraltet — dieser Lagebericht ist 4 months ago abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

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.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–2

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

  • Cornices

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1.5–2.5

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

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Very Likely
    Größe
    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.

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