Bulletin d’avalanche

Coquihalla

Avalanche Canada
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Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
Périmé — ce bulletin a expiré 5 months ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Wind has transported the new snow into slabs and continues to build large fragile cornices.

Even brief periods of strong sun can begin to destabilize the snowpack.

Problèmes avalancheux

  • Wind Slabs

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

    New snow and south west winds have formed small wind slabs in leeward terrain features. Take extra care around treeline gullies or couloires where these are more likely to exist.

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5

    As temperatures rise and sun prevails, expect the large and weakening cornices to collapse. Give a wide berth to cornices and be very aware of overhead hazard.

Confidence

Moderate

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

Avalanche Summary

On Tuesday, avalanche control work conducted south of Hope produced a few small (size 1-1.5) loose dry and slab avalanches with good propagation but not running fast or very far.

If you are heading into the backcountry, consider sharing your observations and posting a MIN.

Snowpack Summary

Up to 35 cm of new has fallen over the past week. As temperature warmed, this new snow has settled and bonded with 50 cm of snow that is above a widespread, thick and hard crust that exists everywhere except the highest alpine terrain.

Steep south facing slopes may be crusty or moist depending on time of day and sun exposure.

The lower snowpack is generally strong and bonded.

Weather Summary

Friday Night
Mostly cloudy. 30 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1300 m.

Saturday
Mix of sun and clouds. 20 km/h west ridgetop wind. Treeline temperature -1 °C. Freezing level 1600 m.

Sunday
Mostly sunny. 20 km/h west ridgetop wind. Treeline temperature 5 °C. Freezing level 2600 m.

Monday
Mostly sunny. 30 km/h southwest ridgetop wind. Treeline temperature 6 °C. Freezing level 2700 m.

Warming weather will change the game, click this link for great terrain and travel advice.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be alert to conditions that change with elevation, aspect, and exposure to wind.
  • Avoid terrain traps such as gullies and cliffs where the consequence of any avalanche could be serious.
  • Avoid steep, sun-exposed slopes when the air temperature is warm or when solar radiation is strong.

Régions couvertes