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Avalanche Forecast - North Columbia - Monashees and Selkirks    


Date Issued   Wednesday, 04 April 2012 11:00 PM      Valid Until    Thursday, 05 April 2012 4:00 PM
Danger Rating: Thursday 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.
Friday Saturday
Alpine 3 - Considerable 2 - Moderate
Treeline 2 - Moderate 2 - Moderate
Below Treeline 2 - Moderate 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.

Storm Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
I think south aspects are still spooky, especially where there's a crust around 50 cm deep or if they warm in the sun. At low elevations the snow is losing strength. New windslabs on northerly slopes behind ridges or on cross loaded terrain
Travel and Terrain Advice
  • Be cautious as you transition into wind affected terrain.
  • Remote triggering is a concern, watch out for adjacent slopes.
  • Carefully evaluate and use caution around thin snowpack areas.
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.
  • Extra caution needed around cornices with current conditions.
Wind Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
Recent new snow and moderate southerly winds continue to build new and bury older windslabs
Travel and Terrain Advice
  • Be cautious as you transition into wind affected terrain.
  • Remote triggering is a concern, watch out for adjacent slopes.
  • Carefully evaluate and use caution around thin snowpack areas.
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.
  • Extra caution needed around cornices with current conditions.
Deep Persistent Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
Persistent weaknesses are buried about 150-200 cm below the surface. Avalanche activity on this interface has become less frequent, but large triggers like cornice fall may release a large avalanche.
Travel and Terrain Advice
  • Be cautious as you transition into wind affected terrain.
  • Remote triggering is a concern, watch out for adjacent slopes.
  • Carefully evaluate and use caution around thin snowpack areas.
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.
  • Extra caution needed around cornices with current conditions.

Prepared by istorm