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Avalanche Forecast

Archived

Apr 14th, 2025–Apr 15th, 2025

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Coquihalla, Harrison-Fraser, Manning, Skagit.

Cornice falls may trigger large avalanches on slopes below.

Avoid traveling on slopes below cornices and give them a wide berth while traveling on ridetops.

Confidence

Moderate

Avalanche Summary

No new avalanches were reported on Sunday. Check out this MIN report showing a couple of old large slabs failing on a crust on northerly aspects at treeline.

NOTE: Observations are currently very limited in this region. Make observations and continually assess conditions as you travel.

Snowpack Summary

High freezing levels have formed a surface crust everywhere except possibly the highest north facing terrain.

The snowpack is generally well-settled and strong, although dormant weak layers may still exist in some areas.

Sustained high freezing levels with poor overnight recovery have the potential to awaken dormant weak layers.

Lower elevations are melting out rapidly.

Weather Summary

Monday Night

Partly cloudy. 10 to 20 km/h southwest ridgetop wind. Treeline temperature 4 °C. Freezing level 2700 m.

Tuesday

Sunny. 10 to 20 km/h west ridgetop wind. Treeline temperature 6 °C. Freezing level 2500 m.

Wednesday

Sunny. 20 to 30 km/h north ridgetop wind. Treeline temperature 0 °C. Freezing level 1900 m.

Thursday

Sunny. 10 to 20 km/h north ridgetop wind. Treeline temperature 3 °C. Freezing level 2200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Cornice failures could trigger large and destructive avalanches.
  • Cornices often break further back than expected; give them a wide berth when traveling on ridgetops.
  • Back off slopes as the surface becomes moist or wet with rising temperatures.

Problems

Cornices

Cornice Fall is the release of an overhanging mass of snow that forms as the wind moves snow over a sharp terrain feature, such as a ridge, and deposits snow on the downwind (leeward) side. Cornices range in size from small wind drifts of soft snow to large overhangs of hard snow that are 30 feet (10 meters) or taller. They can break off the terrain suddenly and pull back onto the ridge top and catch people by surprise even on the flat ground above the slope. Even small cornices can have enough mass to be destructive and deadly. Cornice Fall can entrain loose surface snow or trigger slab avalanches.