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Avalanche Forecast - South Rockies    


Date Issued   Sunday, 25 December 2011 4:29 PM      Valid Until    Monday, 26 December 2011 4:00 PM
Danger Rating: Monday 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.
Tuesday Wednesday
Alpine 2 - Moderate 2 - Moderate
Treeline 2 - Moderate 2 - Moderate
Below Treeline 1 - Low 2 - Moderate
Confidence: Fair - Intensity of incoming weather 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.

Wind Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
Predominantly north through southeast but cross-loading is also possible on open slopes oriented parallel to the wind, which contain features and gullies to catch wind-drifted snow.
Travel and Terrain Advice
  • Be cautious as you transition into wind affected terrain.
  • Highmark or enter your line well below ridge crests to avoid wind loaded pillows.
  • Dig down to find and test weak layers before committing to a line.
  • Carefully evaluate and use caution around thin snowpack areas.
Persistent Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
More of an issue in the northern part of the region where the snowpack is deeper.
Travel and Terrain Advice
  • Be cautious as you transition into wind affected terrain.
  • Highmark or enter your line well below ridge crests to avoid wind loaded pillows.
  • Dig down to find and test weak layers before committing to a line.
  • Carefully evaluate and use caution around thin snowpack areas.

Prepared by mpeter