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Avalanche Forecast - Northwest Inland    


Date Issued   Friday, 02 December 2011 4:18 PM      Valid Until    Saturday, 03 December 2011 4:00 PM
Danger Rating: Saturday Alpine Treeline Below Treeline
3 - Considerable Dangerous avalanche conditions. Careful snowpack evaluation, cautious route finding and conservative decision making essential.
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.
Sunday Monday
Alpine 2 - Moderate 2 - Moderate
Treeline 2 - Moderate 2 - Moderate
Below Treeline 1 - Low 1 - Low
Confidence: Poor - Due to limited 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.

Wind Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
Very strong W-SW winds have created hard and soft wind slabs in exposed leeward terrain well into treeline.
Travel and Terrain Advice
  • Avoid lee and cross-loaded terrain near ridge crests.
  • Use ridges or ribs to avoid pockets of wind loaded snow.
  • Whumpfing, shooting cracks and recent avalanches are all strong inicators of unstable snowpack.
  • If you are increasing your exposure to avalanche terrain, do it gradually as you gather information.
Storm Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
Give the new snow a chance to settle and gain strength before pushing into more committing terrain.
Travel and Terrain Advice
  • Avoid lee and cross-loaded terrain near ridge crests.
  • Use ridges or ribs to avoid pockets of wind loaded snow.
  • Whumpfing, shooting cracks and recent avalanches are all strong inicators of unstable snowpack.
  • If you are increasing your exposure to avalanche terrain, do it gradually as you gather information.

Prepared by pmarshall