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Avalanche Forecast

Archived

Feb 14th, 2024–Feb 15th, 2024

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

Regions

Coquihalla, Harrison-Fraser, Manning, Skagit.

Keep your guard up in steep open terrain! Recent snow has been slow to bond to underlying weak layers.

Confidence

High

Avalanche Summary

Several human triggered storm slab avalanches were reported on the weekend, but since then reports have been limited to mostly small loose avalanches in steep terrain. On Tuesday widespread whumpfing was reported in the Coquihalla area, a sign that new snow may be sitting above reactive surface hoar.

Snowpack Summary

Approximately 30 to 40 cm of recent snow continues to settle and strengthen atop a widespread, thick crust. In some areas, surface hoar crystals may exist atop the crust.

The mid and lower snowpack are well-settled and strong.

At lower elevations, conditions remain rugged with a shallow snowpack and largely wet snow surfaces.

Weather Summary

Wednesday Night

Mostly clear skies. 50 km/h east ridgetop wind. Treeline temperature -10 °C.

Thursday

Mix of sun and cloud with 0 to 2 cm of snow. 30 km/h east ridgetop wind. Treeline temperature -7 °C.

Friday

Mostly sunny. 40 km/h southeast ridgetop wind. Treeline temperature -4 °C.

Saturday

Mix of sun and cloud. 30 km/h southeast ridgetop wind. Treeline temperature -1 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Start on smaller terrain features and gather information before committing to bigger terrain.
  • Back off if you encounter whumpfing, hollow sounds, or shooting cracks.
  • Closely monitor how the new snow is bonding to the old surface.

Problems

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.