Avalanche Forecast

Issued: Dec 3rd, 2024 4:00PM

The alpine rating is considerable, the treeline rating is considerable, and the below treeline rating is considerable. Known problems include Storm Slabs and Loose Wet.

Avalanche Canada, Avalanche Canada

Northwest Coastal, Boundary, Kitimat, Nass, Rupert, Seven Sisters, Shames, Stewart.

Heavy loading from recent snow and rain will leave dense, wet storm slabs primed for rider triggering on Wednesday. Stick to low angle terrain and avoid overhead hazard.

Summary

Confidence

Moderate

Avalanche Summary

A natural avalanche cycle was reported throughout the region on Monday. Storm slabs were observed at all elevations to size 2.

Please consider submitting your observations to the Mountain Information Network.

Snowpack Summary

After Tuesday night, the upper snowpack has been soaked by rain at most elevations. On peaks above 2200 m, 50 to 80 cm of recent storm snow may have escaped the rain and instead been redistributed by strong southwest wind.

The remainder of the snowpack is strong, with various hard layers and crusts.

Weather Summary

Wednesday will bring a short lived reprieve amid the series of frontal systems bringing wet precipitation to the region. After Wednesday, precipitation will resume but freezing levels will begin to gradually drop.

Tuesday Night

Moderate rain up to ~2200 m, 5 to 15 cm of snow on the highest peaks. 30 to 50 km/h southwest ridgetop wind. Freezing level between 2200 and 2500m.

Wednesday

Cloudy with light rain below ~2000 m, 5 cm of snow above. 20 to 40 km/h southwest ridgetop wind. Freezing level between 2000 and 2300 m.

Thursday

Cloudy with light rain overnight turning to snow flurries above ~1500 m. 30 to 50 km/h southwest ridgetop wind. Freezing level between 1400 and 1700 m.

Friday

Cloudy with 5 to 15 cm of snow above ~1400 m. 20 to 40 km/h southwest ridgetop wind. Freezing level between 1200 and 1600 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

Use conservative route selection. Choose simple, low angle terrain with no overhead hazard.
Keep your guard up at lower elevations. Storms slabs have been reactive at all elevations.
Keep in mind that the high density of wet avalanches can make them destructive.

Problems

Storm Slabs

While natural activity will likely taper as the rain eases this morning, storm slabs will likely remain triggerable by riders today. If triggered, these avalanches will be dense and destructive.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Likely

Expected Size

1 - 2.5

Loose Wet

A rain-saturated upper snowpack may be primed for human-triggered loose wet avalanches.