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Avalanche Forecast - South Rockies    


Date Issued   Friday, 16 December 2011 5:03 PM      Valid Until    Saturday, 17 December 2011 4:00 PM
Danger Rating: Saturday Alpine Treeline Below Treeline
2 - Moderate Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.
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.
Sunday Monday
Alpine 2 - Moderate 2 - Moderate
Treeline 2 - Moderate 2 - Moderate
Below Treeline 1 - Low 1 - Low
Confidence: Fair - Freezing levels are 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.

Wind Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
Expect wind slabs on northeasterly aspects.
Travel and Terrain Advice
  • Avoid freshly wind loaded features.
  • Avoid shallow snowpack areas where triggering is more likely.
  • Be aware of thin areas that may propogate to deeper instabilites.
Persistent Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
With numerous avalanches failing on this layer in adjacent regions last week the potential for large, destructive full depth avalanches remains a concern.
Travel and Terrain Advice
  • Avoid freshly wind loaded features.
  • Avoid shallow snowpack areas where triggering is more likely.
  • Be aware of thin areas that may propogate to deeper instabilites.

Prepared by jfloyer