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Avalanche Forecast

Archived

Dec 21st, 2023–Dec 22nd, 2023

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

Regions

Sea To Sky, South Coast, Brandywine, Garibaldi, Homathko, Powell River, Tantalus, North Shore, Sasquatch, Sasquatch, Sky Pilot, Tetrahedron, Harrison-Fraser.

Choose mellow slopes and carefully assess conditions as you gain elevation.

Where new snow is over 20 cm deep, storm slabs are likely to avalanche under the weight of a human.

Confidence

Moderate

Avalanche Summary

No new avalanches were reported before 4pm on Thursday.

If you do head into the backcountry please consider submitting observations and/or photos on the Mountain Information Network.

Snowpack Summary

Moderate snow and rainfall is arriving with strong southwest wind and cooling temperatures. Expect the wind to strip south and west facing ridges down to frozen crusts, and form deeper, more reactive slabs on north and east facing slopes.

In terrain where more than 20 cm of storm snow has accumulated, storm slabs are likely to avalanche under the weight of a human. Below treeline, you'll likely find dirt, or shallow, heavy, moist or wet snow.

The mid and lower snowpack is made up of a series of crusts and rounded grains. The snowpack is generally well consolidated.

Overall, the snow depth remains shallow, creating challenging travel conditions and hiding early season hazards just below the snow surface.

Weather Summary

Thursday Night

Cloudy. Light rain expected, 5 cm of snow above 1500 m, possibly more around Powell River. Moderate to strong south or southwest ridgetop wind. Treeline temperature around 0 °C.

Friday

Mostly cloudy. 15-25 cm of new snow expected above 750 m. Moderate to strong west or southwest ridgetop wind. Treeline low around -4°C.

Saturday

Mostly cloudy. Trace of snow expected. . Treeline temperature around -5 °C. Freezing level around 500 m. Light southwest ridgetop wind

Sunday

Partly cloudy. No new snow expected. Treeline temperature around 1 °C. Freezing level rising to 1750-2250 m, possible temperature inversion. Strong south ridgetop wind.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for changing conditions today, storm slabs may become increasingly reactive.
  • Be careful to keep storm day fever from luring you out into bigger terrain features.
  • Be cautious of buried obstacles especially below treeline.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.