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Avalanche Forecast - Northwest Inland    


Date Issued   Friday, 18 April 2014 4:32 PM      Valid Until    Saturday, 19 April 2014 9:00 PM

This bulletin was created using very limited field data. If you are out in the mountains, please send your observations to forecaster@avalanche.ca

Danger Rating: Saturday Alpine Treeline Below Treeline
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.
1 - Low Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.
Sunday Monday
Alpine 3 - Considerable 3 - Considerable
Treeline 2 - Moderate 2 - Moderate
Below Treeline 1 - Low 1 - Low
Confidence: Fair - Timing, track, or intensity of incoming weather system 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.

Wind Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

Wind slabs are have formed in leeward features from recent snowfall and moderate-strong S-SW winds.  Storm slabs may be a concern areas which received higher snowfall amounts.

Travel and Terrain Advice
  • The new snow will require several days to settle and stabilize.
  • Avoid freshly wind loaded features.
Deep Persistent Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

A deeply buried persistent weak layer still has the potential to produce very large avalanches and could still be triggered by heavy triggers such as cornice falls or smaller avalanches stepping-down.

Travel and Terrain Advice
  • Exercise caution on steep, unsupported slopes.
  • Be aware of the potential for large, deep avalanches due to the presence of buried facets and surface hoar.
  • Conditions have improved, but be mindful that deep instabilities are still present.

Prepared by rbuhler