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Avalanche Forecast - North Columbia - Monashees and Selkirks    


Date Issued   Saturday, 07 January 2012 5:39 PM      Valid Until    Sunday, 08 January 2012 4:00 PM
Danger Rating: Sunday 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.
Monday Tuesday
Alpine 3 - Considerable 3 - Considerable
Treeline 3 - Considerable 2 - Moderate
Below Treeline 2 - Moderate 1 - Low
Confidence: Fair - Forecast snowfall amounts are uncertain on Sunday
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?
Windslabs should become less reactive on Saturday. New windslabs are expected to become very touchy on Sunday with the forecast new snow and warm temperatures.
Travel and Terrain Advice
  • Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.
  • Be aware of the potential for wide propagations due to the presence of hard windslabs.
  • Stay off recent wind loaded areas until the slope has had a chance to stabilize.
  • Be aware of the potential for large, deep avalanches due to the presence of buried surface hoar.
Storm Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
The new snow is expected to develop into a cohesive slab that may slide naturally or be easily triggered by humans. The new storm slab avalanches may trigger the deeper persistent slab weakness.
Travel and Terrain Advice
  • Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.
  • Be aware of the potential for wide propagations due to the presence of hard windslabs.
  • Stay off recent wind loaded areas until the slope has had a chance to stabilize.
  • Be aware of the potential for large, deep avalanches due to the presence of buried surface hoar.
Persistent Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
A cohesive slab sits over a touchy surface hoar weakness buried in mid-December. Avalanches on this layer will be large, destructive and may fracture across surprisingly far distances.
Travel and Terrain Advice
  • Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.
  • Be aware of the potential for wide propagations due to the presence of hard windslabs.
  • Stay off recent wind loaded areas until the slope has had a chance to stabilize.
  • Be aware of the potential for large, deep avalanches due to the presence of buried surface hoar.

Prepared by triley