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Archived

Avalanche Forecast

Dec 3rd, 2024–Dec 4th, 2024
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Babine, East Stikine, Howson, Hudson Bay, Kispiox, Microwave-Sinclair, Ningunsaw, North Bulkley, Northwest Inland, South Bulkley, Telkwa, West Stikine.

Above-zero temperatures will keep the soggy upper snowpack primed for human triggering even as natural avalanche activity tapers off. Stick to low angle terrain and avoid overhead hazard.

Confidence

Low

Avalanche Summary

No new avalanches have been observed, but reports have been extremely limited. We suspect a large natural avalanche cycle to have run during the peak of the rain storm. Looking forward to Wednesday, wet avalanches will likely remain triggerable by riders.

If you head to the backcountry 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 2300 m, 40 to 70 cm of recent storm snow may have escaped the rain and instead been redistributed over firm surfaces by strong southwest winds.

We'll need to reassess whether two surface hoar layers in the mid snowpack have survived or been cleaned out by the rain.

Deeper in the snowpack, a rain crust from early November seems to be bonding well to surrounding snow.

Weather Summary

Tuesday Night

5 to 10 mm of rain below 2300 m. 40 to 60 km/h southwest ridgetop wind. Treeline temperature +2 °C. Freezing level between 2300 and 2500 m.

Wednesday

Mostly cloudy, scattered flurries with no significant accumulation. 20 to 40 km/h southwest ridgetop wind. Treeline temperature +1 °C. Freezing level around 2200 m.

Thursday

Scattered flurries bringing up to 5 cm then clearing to a mix of sun and cloud. 30 to 50 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level around 1700 m.

Friday

5 to 15 cm of snow. 40 to 60 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level around 1500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep in mind that human triggering may persist as natural avalanches taper off.
  • Use conservative route selection. Choose simple, low angle terrain with no overhead hazard.
  • Be alert to conditions that change with aspect and elevation.
  • Keep in mind that the high density of wet avalanches can make them destructive.

Avalanche Problems

Loose Wet

A rain-moistened upper snowpack will be primed for human-triggered loose wet avalanches.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2

Storm Slabs

Wet storm snow may be triggerable as slab avalanches.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2.5