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Avalanche Forecast - Lizard Range    


Date Issued   Monday, 20 February 2012 4:07 PM      Valid Until    Tuesday, 21 February 2012 4:00 PM

A touchy weak layer and uncertain weather forecasts make this a challenging time to travel in the mountains. It's a good time to dial things back.

Danger Rating: Tuesday Alpine Treeline Below Treeline
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.
3 - Considerable Dangerous avalanche conditions. Careful snowpack evaluation, cautious route finding and conservative decision making essential.
Wednesday Thursday
Alpine 3 - Considerable 3 - Considerable
Treeline 3 - Considerable 3 - Considerable
Below Treeline 3 - Considerable 3 - Considerable
Confidence: Poor - Intensity of incoming weather is uncertain on Tuesday
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.

Persistent Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
The early February surface hoar layer is buried up to 40 cm deep in many places. It has started to react to ski-cutting and will become more reactive and produce larger avalanches as more snow is loaded on top of it.
Travel and Terrain Advice
  • Whumpfing, shooting cracks and recent avalanches are all strong indicators of an unstable snowpack.
  • Be careful with low angle slopes that may not normally be a concern.
  • Avoid freshly wind loaded features.
  • Plan escape routes and identify safe zones before committing to your line.
  • Pay attention to overhead hazards like cornices.
Wind Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
Forecast strong to extreme winds will set up touchy wind slab in the alpine and at treeline.
Travel and Terrain Advice
  • Whumpfing, shooting cracks and recent avalanches are all strong indicators of an unstable snowpack.
  • Be careful with low angle slopes that may not normally be a concern.
  • Avoid freshly wind loaded features.
  • Plan escape routes and identify safe zones before committing to your line.
  • Pay attention to overhead hazards like cornices.

Prepared by jfloyer