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Avalanche Forecast - South Coast - Inland    


Date Issued   Tuesday, 24 January 2012 5:05 PM      Valid Until    Wednesday, 25 January 2012 4:00 PM
Danger Rating: Wednesday Alpine Treeline Below Treeline
4 - High Very dangerous avalanche conditions. Travel in avalanche terrain not recommended.
4 - High Very dangerous avalanche conditions. Travel in avalanche terrain not recommended.
3 - Considerable Dangerous avalanche conditions. Careful snowpack evaluation, cautious route finding and conservative decision making essential.
Thursday Friday
Alpine 3 - Considerable 3 - Considerable
Treeline 3 - Considerable 3 - Considerable
Below Treeline 3 - Considerable 2 - Moderate
Confidence: Fair - Intensity of incoming weather is uncertain on Wednesday
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?
Continued snowfall and strong SW winds may set up touchy new wind slabs on opposite slopes and terrain features. Wind slabs may look smooth, they can be stiff, and have a hollow sound to them. Cracking and whumping are obvious indicators.
Travel and Terrain Advice
  • Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.
  • Avoid freshly wind loaded features.
  • The new snow will requires several days to settle and stabilize.
  • Good day to make conservative terrain choices.
Storm Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
Dense new snow now sits on previous low density snow. This has created a top heavy upper snowpack (strong over weak). With forecast wind and snow this interface may become reactive. Storm slabs can be large and destructive.
Travel and Terrain Advice
  • Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.
  • Avoid freshly wind loaded features.
  • The new snow will requires several days to settle and stabilize.
  • Good day to make conservative terrain choices.

Prepared by swerner