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Avalanche Forecast - South Rockies    


Date Issued   Tuesday, 22 April 2014 3:36 PM      Valid Until    Wednesday, 23 April 2014 9:00 PM

We are no longer issuing danger ratings for this region due to a lack of field data.

Check out this video and blog post for more insight into managing spring conditions.

Danger Rating: Wednesday Alpine Treeline Below Treeline
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Thursday Friday
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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?

Large cornices loom above many alpine slopes and will become weak with daytime warming. Give cornices a wide berth while traveling on or below ridges.

Travel and Terrain Advice
  • Cornices become weak with daytime heating, so travel early on exposed slopes.
  • Extra caution needed around cornices with current conditions.
Deep Persistent Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

The potential for deep persistent slabs will increase when the sun is shining, temperatures are warm or when rain falls. Minimize exposure to big alpine slopes when things are warming up.

Travel and Terrain Advice
  • Be aware of the potential for large, deep avalanches due to the presence of buried persistent weak layers.
Loose Wet
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

Loose wet activity is likely in steep terrain during periods of rain, warming, or solar radiation.

Travel and Terrain Advice
  • Be cautious of sluffing in steep terrain.
  • Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.

Prepared by Peter