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Avalanche Forecast - South Columbia    


Date Issued   Thursday, 17 April 2014 4:33 PM      Valid Until    Friday, 18 April 2014 9:00 PM

Avalanche danger can rise very quickly with warming temperatures and/or brief periods of sun. Be aware of changing conditions and overhead hazards.

For more insight into spring danger ratings, check out our Blog Post.

Danger Rating: Friday 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.
Saturday Sunday
Alpine 2 - Moderate 2 - Moderate
Treeline 2 - Moderate 2 - Moderate
Below Treeline 1 - Low 2 - Moderate
Confidence: Fair - Intensity of incoming weather systems 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.

Loose Wet
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

Expect to see an increase in avalanche activity with forecast rain at lower elevations or on solar aspects if the sun comes out for extended periods of time.

Travel and Terrain Advice
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.
  • Cornices become weak with daytime heating, so travel early on exposed slopes.
Wind Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

New wind slabs immediately lee of ridge crest may be sensitive to human triggering.

Travel and Terrain Advice
  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

Prepared by esharp