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Avalanche Forecast

Archived

Feb 2nd, 2023–Feb 3rd, 2023

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

Regions

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

Watch for avalanche hazard increasing in the afternoon as new snow accumulates. Investigate how storm snow is bonding to the crust below it and use appropriate sluff management techniques in steep terrain.

Confidence

High

Avalanche Summary

On Wednesday, explosives control produced a few size 1 avalanches on new storm snow. Backcountry users should expect to see evidence of a small loose dry avalanche cycle in steep terrain.

Please continue to post your reports and photos to the Mountain Information Network, the information is very helpful to forecasters.

Snowpack Summary

Afternoon flurries will build upon 10-15 cm of storm snow overlying a melt-freeze crust. The crust varies in thickness from thick and supportive to thin and breakable. The middle and lower snowpack is strong and bonded.

Weather Summary

Thursday night

Isolated flurries overnight, 2-4 cm accumulation. Southwesterly ridgetop winds 40 to 60 km/h. Treeline temperatures -1 ˚C. Freezing levels climb to 1500 m.

Friday

Cloudy with flurries starting around noon bringing 5-10 mm of precipitation. Southerly ridgetop winds 50 to 70 km/h. Treeline temperatures -2 ˚C. Freezing levels fall to 1200 m.

Overnight storm increases in intensity. An additional 30-50 mm of precipitation is expected overnight. 40 to 70 km/h south wind.

Saturday

The storm continues with cloudy skies and flurries, 25 mm precipitation. 40 km/h south ridgetop wind, treeline temperatures warm to -2 ˚C. Freezing levels 1300 m.

Sunday

Cloudy skies with scattered flurries, 10 mm precipitation. 20 km/h west ridgetop wind, treeline temperatures warm to -2 ˚C. Freezing levels 1200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Be especially cautious as you transition into wind affected terrain.
  • Seek out wind sheltered terrain below treeline where you can avoid wind slabs and find great riding.

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.