Boletín de aludes

South Coast

Feb 15 – 16, 2023Avalanche Canada
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Archivado · caducó 4 years ago

Peligro de aludes

Fri
Sat
Alta montaña
2 · Moderado
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil
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Lo esencial

Avalanches are possible on wind-loaded features in the alpine. Carefully evaluate wind loading in terrain and investigate the bond of wind slabs to the crust below them before committing to a slope.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2

    Northerly winds are distributing available storm snow into lees on south slopes. Watch for areas that have been reverse-loaded and cross-loaded at higher elevations.

    On Wednesday southwesterly winds pick up to moderate in the alpine and begin building fresh wind slabs on north and east slopes. Look for fresh windslab development as you travel into higher elevations.

    Wind slabs may be sitting on a crust making them especially reactive to ridder triggering.

Confidence

High

Avalanche Summary

There have been no new avalanches reported in the region since Wednesday. Backcountry users should expect to see evidence of a small natural avalanche cycle caused by strong solar radiation Tuesday.

Snowpack Summary

10 cm of storm snow blankets the Coast Mountains. Underneath recent storm snow, a breakable freezing rain crust is found between 1100 m and 1600 m, possibly higher. Moderate variable winds are redistributing new snow into deeper pockets in lees at higher elevations.

A hard crust can now be found in sheltered, approximately 60 to 80 cm deep. The rest of the mid and lower snowpack seems strong and consolidated.

Snowpack depths are reaching 230 cm at treeline.

Weather Summary

Tuesday Night

Clear skies. Winds northwest switching to west 25 km/h gusting 40 km/h. Treeline temperatures -6 °C and freezing levels drop to 300 m. 

Wednesday 

Partly cloudy. Winds southwest 20-40 km/h. Treeline temperatures -5 °C and freezing levels 600 m. 

Thursday

Mix of sun and cloud with isolated flurries, 5 mm accumulation. Winds southwest 20-40 km/h. Treeline temperatures -4 °C and freezing levels 700 m. 

Overnight cloudy with flurries, 5-10 mm accumulation.

Friday

Cloudy with isolated flurries, trrace accumulation. Winds west 40 km/h. Treeline temperatures -2 °C and freezing levels 1000 m. 

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Approach lee and cross-loaded slopes with caution.
  • Fresh wind slabs will likely form throughout the day, diligently watch for changing conditions.

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