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Avalanche Forecast - Northwest Coastal    


Date Issued   Saturday, 19 April 2014 4:10 PM      Valid Until    Sunday, 20 April 2014 9:00 PM

This bulletin was created using very limited field data. If you are out in the mountains, please send your observations to forecaster@avalanche.ca

Danger Rating: Sunday Alpine Treeline Below Treeline
3 - Considerable Dangerous avalanche conditions. Careful snowpack evaluation, cautious route finding and conservative decision making essential.
3 - Considerable Dangerous avalanche conditions. Careful snowpack evaluation, cautious route finding and conservative decision making essential.
2 - Moderate Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.
Monday Tuesday
Alpine 3 - Considerable 2 - Moderate
Treeline 2 - Moderate 2 - Moderate
Below Treeline 1 - Low 1 - Low
Confidence: Fair - Timing or intensity of solar radiation is uncertain
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.

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

Recent storm snow may have formed storm slabs in some areas and strong SW winds have formed stiffer wind slabs in leeward features.

Travel and Terrain Advice
  • Avoid freshly wind loaded features.
  • The new snow will require several days to settle and stabilize.
Loose Wet
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

Rain at lower elevations will saturate and destabilize the upper snowpack. Loose sluffing from steep terrain features is possible, especially from human-triggering.

Travel and Terrain Advice
  • Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.
  • Be cautious of sluffing in steep terrain.
Deep Persistent Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

A deeply buried persistent weak layer still has the potential to produce very large avalanches and could be triggered by heavy triggers such as cornice falls or smaller avalanches stepping-down.

Travel and Terrain Advice
  • Conditions have improved, but be mindful that deep instabilities are still present.
  • There is potential for large, deep avalanches due to the presence of buried facets and surface hoar.

Prepared by rbuhler