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Avalanche Forecast - South Rockies    


Date Issued   Wednesday, 11 January 2012 6:19 PM      Valid Until    Thursday, 12 January 2012 4:00 PM
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.
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 2 - Moderate
Treeline 2 - Moderate 2 - Moderate
Below Treeline 1 - Low 1 - Low
Confidence: Good - -1
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?
New snow and generally localized winds have set up wind slabs in the immediate lee of ridgelines and other exposed terrain features.
Travel and Terrain Advice
  • Avoid freshly wind loaded features.
  • Be aware of thin areas that may propogate to deeper instabilites.
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.
Persistent Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
At least two distinct surface hoar layers lie buried up to 80 cm below the snow surface. Triggering these layers has become difficult and isolated to steep, shallow rocky start zones; however the destructive potential of a slide is high.
Travel and Terrain Advice
  • Avoid freshly wind loaded features.
  • Be aware of thin areas that may propogate to deeper instabilites.
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.

Prepared by jfloyer