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Archived

Avalanche Forecast

Dec 4th, 2023–Dec 5th, 2023
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
1: Low
The avalanche danger rating below treeline will be low
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Clearwater, North Okanagan, Shuswap, South Okanagan.

Warm air and rain may form a slab above a weak layer that could be touchy to riders.

Confidence

Low

Avalanche Summary

We haven't received any reports of avalanche activity in this region. Activity may increase with Monday night's stormy weather.

Snowpack Summary

Light snow will switch to rain Monday night, wetting the snow surface. Rain could rapidly destabilize the 10 to 20 cm of recent snow that overlies a widespread weak layer of feathery surface hoar.

The middle and base of the snowpack is generally weak and faceted.

Snowpack depths at treeline are approximately 50 to 70 cm. The snowpack tapers drastically with elevation below treeline.

Weather Summary

Monday Night

Cloudy with 2 to 5 cm of snow switching to light rain below 2500 m. Southwest alpine wind 40 km/h. Treeline temperature 0 °C.

Tuesday

Cloudy with trace snow or rain. Southwest alpine wind 20 to 40 km/h. Treeline temperature 1 °C. Freezing level dropping from 2500 m to 2000 m.

Wednesday

Cloudy with 2 to 5 cm of snow. South alpine wind 10 to 20 km/h. Treeline temperature -1 °C.

Thursday

Partly cloudy with trace snow. Northwest alpine wind 10 to 20 km/h. Treeline temperature -5 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Closely monitor how the new snow is bonding to the old surface.
  • Be aware of the potential for larger than expected storm slabs due to the presence of buried surface hoar.
  • Extra caution for areas experiencing rapidly warming temperatures for the first time.
  • Watch for rapidly changing conditions during periods of heavy loading from new snow, wind, or rain.

Avalanche Problems

Storm Slabs

Warm air and rain may rapidly form a reactive slab that overlies a widespread weak layer. This will be most problematic at higher elevations where the snowpack is relatively smooth without major ground roughness.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2