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Avalanche Forecast

Archived

Apr 9th, 2025–Apr 10th, 2025

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

Regions

Coquihalla, Harrison-Fraser, Manning, Skagit.

Wet avalanches are possible due to high freezing levels and rain.

Confidence

Moderate

Avalanche Summary

While we have no recent observations from this region, we suspect wind slab and wet loose avalanches occurred during recent storms and we can expect more with another storm on Thursday afternoon.

Snowpack Summary

Fluctuating freezing levels are causing rapid settlement and melting of the snowpack. However, up to 30 cm of snow has likely fallen at upper elevations in the past few days, which is likely heavily wind-affected from strong south winds.

Freezing levels will peak near 2500 m on Thursday before dropping as an approaching storm begins as rain and transitions to snow, with the heaviest accumulations expected Thursday evening.

Lower elevations are melting out quickly.

Weather Summary

Wednesday Night

Partly cloudy. 20 km/h south ridgetop wind. Treeline temperature -1 °C. Freezing level 1800 m.

Thursday

Increasing cloud with 5 to 10 mm of precipitation, snow possible above 1600 m. 60 km/h south ridgetop wind. Treeline temperature 3 °C. Freezing level peaking at 2400 m in the morning then dropping to 1600 m.

Friday

Another 10 to 20 cm of snow by the morning then a mix of sun and cloud during the day. 30 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1500 m.

Saturday

Mostly cloudy with 2 to 5 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -5 °C. Freezing level 1200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • The first few hours of rain will likely be the most dangerous period.
  • Be alert to conditions that change with elevation, aspect, and exposure to wind.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Problems

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.