Bulletin d’avalanche

West Slopes Central

Northwest Avalanche Center
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Danger d’avalanche

Thu
Alpin
2 · Modéré
Limite forestière
3 · Marqué
Sous la limite
3 · Marqué
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Périmé — ce bulletin a expiré 5 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Warmer temperatures increase chances of wet loose avalanches on Wednesday. Uncertainty exists about the extent of the problem, as we will see more clouds throughout the day. Monitor the snow surface as you travel, and when it starts getting wet shift to low angle terrain or drier snow.

Problèmes avalancheux

  • Loose Wet

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

    This is the warmest day of the week, with a freezing level rising to 7500ft. Cloud cover will slowly increase throughout the day, but the weather forecast doesn’t paint a clear enough picture for determining the extent of wet loose avalanches. If there is sunshine in the morning, expect to see avalanches on easterly slopes, shifting south then west as the day progresses. Lower elevations will warm more than up high. They could become large and cause serious harm if you are caught. Increasing cloud cover may diminish the hazard, but it is unclear how much at this point. Only upper elevation north aspects will retain dry snow, if at all. 

    This is the day to base your travel on constant snowpack assessments. Monitor the snow surface for warming and pay attention to any rollerballs running downhill. When you start noticing these indicators, no matter what aspect or elevation, it’s time to leave that area. Start moving towards lower angle terrain where there is no overhead hazard, or cooler slopes.

    An example of rollerballs from earlier this year. Clues like this indicate the surface snow is becoming wet and unstable.

Avalanche Discussion

Isolated pockets on steep north facing terrain could still harbor reactive wind slabs from Sunday's snow and wind event. Travel carefully if you choose to recreate in those areas. The spike in temperature on Wednesday could lead to cornices breaking. As always, stand far back from their edge and limit the time you spend beneath them. 

The spring cycle is beginning to come out in full force, where paying attention to snow conditions at lower elevations and on southerly slopes are a critical factor in daily travel. The day may start out hard and crusty but could change substantially as temperatures warm. Keep these large swings in mind as you plan your trips.  

During the ongoing Covid-19 pandemic, continue to follow the latest guidance from local, state, and federal health officials. Avoid unnecessary risks that could impact first responders and stress medical resources.  Wear a mask when appropriate, practice social distancing, and consider recreating closer to home.

Régions couvertes