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Avalanche Forecast - Yukon    


Date Issued   Wednesday, 16 April 2014 4:16 PM      Valid Until    Friday, 18 April 2014 10:00 PM

Spring has arrived in White Pass! Check the latest series of forecaster blog posts to learn more about what this means for avalanche conditions.

Also, hard copies of Friday's Bulletin will be posted at ATES signs throughout White Pass.

Danger Rating: Thursday 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.
No Rating No Rating
Friday Saturday
Alpine 2 - Moderate 2 - Moderate
Treeline 2 - Moderate 2 - Moderate
Below Treeline No Rating No Rating
Confidence: Fair - Freezing levels are 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.

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

Reactivity on this layer is spotty and unpredictable. Assess large aggressive terrain carefully before committing to a line

Travel and Terrain Advice
  • Dig down to find and test weak layers before committing to a line.
Loose Wet
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

Overnight temperatures should be monitored closely. If overnight refreezes continue to be poor, more loose wet activity is expected.

Travel and Terrain Advice
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.
  • Travel early on frozen crusts before the heat of the day.
Cornices
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?

Be aware that cornices have the potential to break further back than one would expect.  Be extra wary of cornices when solar radiation is intense. 

Travel and Terrain Advice
  • Cornices become weak with daytime heating, so travel early on exposed slopes.
  • Extra caution needed around cornices with current conditions.
  • Pay attention to overhead hazards like cornices.

Prepared by jminifie