Bulletin d’avalanche

Lizard-Flathead

Avalanche Canada
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Danger d’avalanche

Thu
Fri
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré
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Périmé — ce bulletin a expiré 4 months ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Avalanche danger will rise through the day with warming and light rain

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

Problèmes avalancheux

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–2.5

    Cornices are more likely to fall as the temperature rises.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2

    Wet loose avalanches are most likely during periods of warm temperatures, no overnight refreeze and rain.

Confidence

Low

  • We are uncertain about forecast precipitation amounts.
  • We are uncertain due to a limited number of field observations.

Avalanche Summary

No new avalanches reported.

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 may exist on the surface on all but north facing alpine terrain, where 10 to 30 cm of dry snow sits atop a crust. 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


Tuesday Night
Mostly clear skies. 20 km/h southeast ridgetop wind. Treeline temperature 9 °C. Freezing level 3500 m.

Wednesday
Mostly cloudy. 4 to 15 mm of rain at treeline starting midday. 30 km/h east ridgetop wind. Treeline temperature 3 °C. Freezing level 2700 m.

Thursday
Mostly cloudy. 10 to 20 cm of snow. 30 km/h east ridgetop wind. Treeline temperature -4 °C. Freezing level 1300 m.

Friday
Mix of sun and clouds. 5 to 10 cm of snow. 20 km/h northeast ridgetop wind. Treeline temperature -8 °C. Freezing level 1000 m.



More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avalanche danger will increase as the surface crust breaks down.
  • Think carefully about your exit plan from the backcountry because avalanche danger is expected to increase throughout the day.
  • The more the snowpack warms up and weakens, the more conservative your terrain selection should be.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Régions couvertes