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Avalanche Forecast - South Rockies    


Date Issued   Wednesday, 16 April 2014 3:50 PM      Valid Until    Thursday, 17 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: Thursday Alpine Treeline Below Treeline
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.
1 - Low Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.
Friday Saturday
Alpine 2 - Moderate 2 - Moderate
Treeline 1 - Low 2 - Moderate
Below Treeline 1 - Low 1 - Low
Confidence: Poor - Due to the number of field observations
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.

Cornices
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

Daytime heating makes cornices droop and become unstable. A large cornice release could also trigger a deep persistent weak layer and produce a very large avalanche.

Travel and Terrain Advice
  • Give cornices a wide berth when travelling on or below ridges.
Deep Persistent Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

The likelihood of triggering this problem is low, but the consequences of triggering would be very high. Use extra caution if it is raining or the sun is strong. 

Travel and Terrain Advice
  • Be aware of the potential for large, deep avalanches due to the presence of buried persistent weak layers.

Prepared by Peter