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Avalanche Forecast

Archived

Dec 16th, 2024–Dec 17th, 2024

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

Regions

Coquihalla, Manning, Skagit.

Continuously assess for wind slab as you move through terrain.

Rider triggerable wind slabs could still be found on northerly aspects at treeline and above.

Confidence

Moderate

Avalanche Summary

There have been no recent avalanche reports in the region.

If you are going out in the backcountry, please consider sharing your observations on the Mountain Information Network (MIN).

Snowpack Summary

Ongoing southerly winds are likely forming wind slabs on northerly aspects. A surface hoar layer may be found in the upper snowpack but it’s depth and distribution are uncertain. Soft snow can still be easily found in sheltered terrain.

Check out this great MIN from the region.

In the alpine, an estimated 30 to 50 cm of snow sits above a thin crust. At lower elevations, 10 to 20 cm of snow sits above a more robust crust. The snow is moist below the crust.

Snow depths at treeline vary across the region. Around 105 cm is reported in the Coquihalla and 80 cm near Manning Park.

Weather Summary

Monday Night

Clearing throughout the night with trace amounts of snow expected. 20 to 40 km/h south ridgetop wind. Treeline temperature -8 °C.

Tuesday

Cloud increasing throughout the day with around 5 cm of snow expected. 30 to 50 km/h south ridgetop wind. Treeline temperature -4 °C.

Wednesday

Cloudy with up to 25 cm of snow expected by late morning. 40 to 70 km/h southwest ridgetop wind. Freezing level rising to 1700 m.

Thursday

Cloudy with light rain. 50 to 70 km/h south ridgetop wind. Freezing level around 2000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected terrain.
  • Use ridges or ribs to avoid areas of wind-loaded snow.

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.