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Avalanche Forecast

Archived

Mar 30th, 2024–Mar 31st, 2024

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

Regions

Sasquatch, Sasquatch, Coquihalla, Harrison-Fraser, Manning, Skagit.

Watch for rapidly changing conditions on sun affected slopes - recent storm snow may slide easily on the crust below.

Confidence

Moderate

Avalanche Summary

Last reported avalanches were from explosive control work on Thursday, producing size 1-2 wind slabs in north facing treeline terrain. Crowns were thin, however wide propagation was reported.

Moving forward we expect wet avalanches to be most likely on sun affected slopes.

Snowpack Summary

Up to 25 cm of recent snow can be found over a widespread crust. Surface snow is expected to become moist or wet with rising temperatures and sun, on steep south facing slopes the crust below may also break down.

The snowpack below the crust is strong and bonded.

Weather Summary

Saturday Night.

Mostly clear skies. 10-20 km/h northwest ridgetop wind. Treeline temperature -1 °C. Freezing level drops to 1000 m.

Sunday

Clear skies. 30-50 km/h northeast ridgetop wind. Freezing level rises to 3000 m, bringing treeline temperatures to +10 °C.

Monday

Freezing levels remain around 2800 m overnight and throughout Monday. A mix of sun and cloud. 30 km/h northwest ridgetop wind. Treeline temperatures around +9 °C.

Monday

Freezing levels remain around 2500 m overnight and throughout Tuesday. Clear skies. 40 km/h southwest ridgetop wind. Treeline temperatures around +7 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet
  • A moist or wet snow surface, pinwheeling and natural avalanches are all indicators of a weakening snowpack.
  • Rocks will heat up with daytime warming and may become trigger points for loose wet avalanches

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.