Avalanche Forecast

Issued: Jan 9th, 2023 4:00PM

The alpine rating is moderate, the treeline rating is low, and the below treeline rating is low. Known problems include Wind Slabs.

Avalanche Canada shorton, Avalanche Canada

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Assess for wind slabs in steep terrain.

Summary

Confidence

High

Avalanche Summary

Over the weekend, a few size 2 wind slab avalanches and small dry loose avalanches were observed in steep terrain. Explosive control produced a few size two avalanches on buried facet layers, but mostly indicated this layer has become unreactive to human triggering.

Snowpack Summary

Recent strong southerly wind formed wind slabs in lee terrain features near ridges. Settled storm snow exists in sheltered terrain, and moist snow or a hard crust is found below around 800 m. Weak layers that were reactive over the Christmas and New Year's period have shown signs of bonding and gaining strength. These include a surface hoar layer buried on Dec 28 found 40 to 60 cm deep and a facet layer buried on Dec 23 found 60 to 100 cm deep.

Weather Summary

Monday night

Cloudy, no precipitation, 30 to 40 km/h southeast wind, treeline temperature -6 °C, freezing level 600 m.

Tuesday

Cloudy with snowfall, accumulations up to 5 cm, 20 km/h southeast wind, treeline temperature -4 °C.

Wednesday

Light flurries in the morning with up to 5 cm of snow, mix of sun and cloud in the afternoon, 30 to 40 km/h southeast wind, treeline temperature -2 °C.

Thursday

Cloudy wth scattered flurries bringing 5 to 10 cm of snow, 30 to 40 km/h south wind, treeline temperature -4 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Exercise caution on steep, unsupported slopes.
  • Carefully evaluate steep lines for wind slabs.
  • Use ridges or ribs to avoid areas of wind loaded snow.

Problems

Wind Slabs

An icon showing Wind Slabs

Recent strong southerly wind formed wind slabs on north-facing terrain. Assess for slabs prior to committing to steep terrain.

Aspects: North, North East, East, West, North West.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Valid until: Jan 10th, 2023 4:00PM