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Avalanche Forecast - Northwest Coastal    


Date Issued   Wednesday, 23 April 2014 4:01 PM      Valid Until    Thursday, 24 April 2014 9:00 PM

Due to a lack of field observations, we are starting to transition to bulletins without Danger Ratings. Check out this Blog Post for more information on spring ratings.

Danger Rating: Thursday Alpine Treeline Below Treeline
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.
1 - Low Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.
Friday Saturday
Alpine 2 - Moderate No Rating
Treeline 2 - Moderate No Rating
Below Treeline 1 - Low No Rating
Confidence: Fair - Timing or intensity of solar radiation is uncertain on Thursday
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?

Recent wind slabs have become more stubborn to trigger, but may persist for a few more days.

Travel and Terrain Advice
  • Be cautious as you transition into wind affected terrain.
  • Use caution in lee areas in the alpine. Recent wind loading have created wind slabs.
Loose Wet
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

Snow may become moist or wet at lower elevations due to day time warming or from exposure to the sun.

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?

Deeply buried persistent weak layers continue to be  a concern for isolated hard to predict avalanches. Avalanches releasing on these deep layers may be more likely during periods of strong solar radiation, or when there is no overnight freeze.

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 triley