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Avalanche Forecast - North Rockies - BC    


Date Issued   Friday, 13 September 2013 11:00 PM      Valid Until    Saturday, 13 September 2014 6:02 PM

Daily forecasts will begin on Friday Nov 22nd, until then you have to act as your own forecaster. Here are some ideas to help you through the fall. And this should help if you’re wondering Where are the danger ratings?

Danger Rating: Saturday Alpine Treeline Below Treeline
No Rating No Rating
No Rating No Rating
No Rating No Rating
Sunday Monday
Alpine No Rating No Rating
Treeline No Rating No Rating
Below Treeline No Rating No Rating
Confidence: Poor
Learn more about danger ratings
Low Moderate Considerable High Extreme

Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.

Natural and human-triggered avalanches unlikely.

Small avalanches in isolated areas or extreme terrain.

Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.

Natural avalanches unlikely; human-triggered avalanches possible.

Small avalanches in specific areas; or large avalanches in isolated areas.

Dangerous avalanche conditions. Careful snowpack evaluation, cautious route-finding and conservative decision-making essential.

Natural avalanches possible; human-triggered avalanches likely.

Small avalanches in many areas; or large avalanches in specific areas; or very large avalanches in isolated areas.

Very dangerous avalanche conditions. Travel in avalanche terrain not recommended.

Natural avalanches likely; human-triggered avalanches very likely.

Large avalanches in many areas; or very large avalanches in specific areas.

Avoid all avalanche terrain.

Natural and human-triggered avalanches certain.

Large to very large avalanches in many areas.

Wind Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

Wind slab conditions will develop on lee terrain in exposed areas during storms or when the wind can pick up new snow and blow it around. Feeling dense surface snow or cracking around you helps alert you to these places

Travel and Terrain Advice
  • Ensure everyone has essential avalanche gear and knows how to use it.
  • If you are increasing your exposure to avalanche terrain, do it gradually as you gather information.
  • Note recent avalanche activity.
  • Avoid freshly wind loaded features.
  • Early season hazards such as rocks, trees and stumps are still visible.
Storm Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

Storm slabs are a problem during and immediately following storms producing more than 25 to 30 cm of new snow.

Travel and Terrain Advice
  • Ensure everyone has essential avalanche gear and knows how to use it.
  • If you are increasing your exposure to avalanche terrain, do it gradually as you gather information.
  • Note recent avalanche activity.
  • Avoid freshly wind loaded features.
  • Early season hazards such as rocks, trees and stumps are still visible.
Persistent Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

The most prevalent (but possibly not the only) persistent weakness at this time of year will be facets that grow next to a crust, or at the interface between old snow/glacial ice from last season and this year�s new snow.

Travel and Terrain Advice
  • Ensure everyone has essential avalanche gear and knows how to use it.
  • If you are increasing your exposure to avalanche terrain, do it gradually as you gather information.
  • Note recent avalanche activity.
  • Avoid freshly wind loaded features.
  • Early season hazards such as rocks, trees and stumps are still visible.

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