Bollettino valanghe

South Okanagan

Dec 13 – 14, 2022Avalanche Canada
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Archiviato · scaduto 4 years ago

Pericolo valanghe

Thu
Fri
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole

In sintesi

Watch for wind-loaded pockets, especially at ridge crests and in extreme terrain.

Seek out sheltered terrain to find preserved snow and the best riding.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2

    New snow from the weekend and light southwest winds have built soft windslab in lees. As winds switch to the north tonight watch for reverse and cross-load slopes at higher elevations.

Confidence

Low

Avalanche Summary

On Sunday explosives control triggered several size 1.5 wind slab avalanches on an east-facing aspect in the alpine. Avalanche released above a weak layer of surface hoar, crust, and faceted crystals.

Please submit a Mountain Information Network report if you are heading to the backcountry!

Snowpack Summary

20 -30 cm of snow has been redistributed by southwest winds and has formed soft wind slabs in lees at higher elevations. As winds switch to the north watch for reverse loading and cross-loading in the surface slab. On south-facing slopes this snow sits on a sun crust and in sheltered terrain, it sits over a layer of weak surface hoar.

Buried 40 to 60cm deep, a layer of surface hoar, crust, and faceted crystals is a layer of concern. Observations are limited in this region but this layer has already produced avalanches in the neighboring regions.

Snowpack depths at upper treeline is around 80 - 100 cm.

Weather Summary

Monday Night

Clear skies with light northerly ridge winds. Alpine temperatures, low of -8. Freezing levels valley bottom.

Tuesday

Mainly clear in the morning with clouds increasing in the afternoon. Northerly ridge wind 25 km/hr. Alpine temperatures, high of -4. Freezing levels 500m.

Wednesday

A mix of sun and cloud. Northwesterly ridge winds 40 - 60 km/hr. Alpine temperatures, high of -4. Freezing levels valley bottom.

Thursday

Clear skies. Northwesterly ridge winds 40 - 60 km/hr. Alpine temperatures, high of -5. Freezing levels valley bottom.

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.
  • Avoid lee and cross-loaded slopes at and above treeline.
  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.

Regioni coperte