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Avalanche Forecast

Archived

Feb 15th, 2023–Feb 16th, 2023

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

Regions

Kootenay Boundary, Bonnington, Grohman, Kootenay Pass, Norns, Rossland, South Okanagan, Ymir, Moyie.

The weather is providing great travel conditions but remain cautious around older wind slabs that could be sitting on weaker snow. Also pay attention to how the sun might be affecting south aspects at lower elevations.

Confidence

High

Avalanche Summary

No new avalanches have been reported in this region since the weekend.

Snowpack Summary

Surface conditions are variable and include sun crusts, wind-affected snow, and in some places up to 10 cm of snow above surface hoar. Sheltered areas have 20 to 40 cm of soft snow from last week. This snow sits above a layer of surface hoar or decomposing crusts, that could develop into a problem when buried more deeply. The lower snowpack contains weak and faceted grains, but these layers have not recently produced avalanches.

Weather Summary

Wednesday night

Mostly clear. Winds from the south 10 km/h. Alpine temperature -10˚C.

Thursday

Clear but increasing cloudiness throughout the day. Flurries possible late in the day. Wind from the south at 10 km/h gusting to 20 km/h. Temperature rising from -10˚C to -2˚C as the day progresses.

Friday

Mostly cloudy. Flurries delivering 2 -4 cm of snow. Wind from the southwest 10 km/h. Temperature -4˚C.

Saturday

Mostly cloudy. Potential for short flurries. Wind 5-10 km/h from the south. Temperature -6˚C to -2˚C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.