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Avalanche Forecast

Archived

Jan 12th, 2023–Jan 13th, 2023

Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural avalanches possible, human triggered probable.
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

South Coast, North Shore, Sasquatch, Sky Pilot, Tetrahedron.

Dangerous avalanche conditions persist with the ongoing storm.

Avoid avalanche terrain during periods of heavy rain.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported this week however backcountry users should expect to see evidence of a wet loose avalanche cycle from the past 48 hours of rain. Please continue to post your observations and photos to the Mountain Information Network. It helps strengthen our data gathering.

Snowpack Summary

Up to 100 mm of rain in the last 24 hours is saturating the snowpack at all elevations. Previously 25 mm of snow sat upon a melt-freeze crust down 40 cm. The upper snowpack consists of moist snow overlying a few decomposing crusts formed in early January and late December. Generally, the snowpack is well-settled.

Weather Summary

Thursday Night

Stormy, 50 mm of rain expected. Extreme southerly ridge winds gusting 80-100 km/h. A high of +4C at treeline. Freezing levels rise to 2000-2300 m.

Friday

Stormy, 25-40 mm of rain. Extreme southerly ridge winds gusting 80-100 km/h. A high of +3C at treeline. Freezing levels hover around 1800-2300 m.

By evening the storm subsides easing winds and precip.

Saturday

Mostly cloudy with isolated showers, 5-10 mm, moderate southwesterly winds gusting 30-50 km/h. A high of +2C at treeline. freezing levels drop to 1500 m.

Sunday

A mix of sun and cloud. Light variable winds gusting 20 km/h. A high of 0C at treeline. Freezing levels continue dropping to 1200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.
  • The more the snow feels like a slurpy, the more likely loose wet avalanches will become.
  • Loose avalanches may start small but they can grow and push you into dangerous terrain.
  • Watch for unstable snow on specific terrain features, especially when the snow is moist or wet.

Problems

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.