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Avalanche Forecast

Archived

Apr 10th, 2024–Apr 11th, 2024

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

Regions

North Columbia, South Columbia, Blue River, Clemina, Esplanade, Jordan, North Monashee, North Selkirk, West Purcell, Badshot-Battle, Central Selkirk, Goat, Gold, Retallack, Valhalla, Whatshan.

Storm snow and wind have built fresh slabs at higher elevations. Use caution in wind-affected terrain where deeper deposits exist and human-triggered avalanches are possible.

Confidence

Moderate

Avalanche Summary

On Tuesday, a skier remote size 2.5 wind slab avalanche was reported near Blue River. This avalanche occurred on an east aspect in the alpine and was triggered from 10 m away.

Several, size 2, natural avalanches were observed in steep terrain primarily on northerly aspects above 2000 m. Explosives control in the region produced storm slab results up to size 2.5.

Snowpack Summary

10 to 40 cm of settling storm snow covers the surface at higher elevations. Previous variable winds have redistributed new snow into lees in exposed alpine features. The new snow sits above a crust in most areas. The exception is on high northerly aspects above 2200 m where it overlies dry snow.100 to 50 cm down is a layer of weak faceted grains above a crust, formed in early February. This layer has generally been gaining strength, however it is still occasionally producing large avalanches at upper elevations where supportive crusts have not formed above it.

Below 1400 m surfaces are moist and the snowpack is rapidly disappearing.

Weather Summary

Wednesday Night

Partly cloudy. Ridgetop wind southwest 10 to 20 km/h. Treeline temperature +1 °C. Freezing level 1800 m.

Thursday

Cloudy with 2 to 8 cm of snow at upper elevations. Ridgetop wind south 15 to 30 km/h. Treeline temperature 0 °C. Freezing level 1700 m.

Friday

A mix of sun and cloud with 0 to 3 cm of snow at upper elevations. Ridgetop wind southwest 10 to 15 km/h. Treeline temperature +3 °C. Freezing level 2200 m.

Saturday

A mix of sun and cloud. Ridgetop wind northwest 10 to 25 km/h. Treeline temperature +5 °C. Freezing level 2400 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • The new snow could use a day or two to settle and stabilize before we start to tee up the bigger lines.
  • Be especially cautious as you transition into wind affected terrain.
  • Carefully monitor the bond between the new snow and old surface.
  • Seek out sheltered terrain where new snow hasn't been wind-affected.

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.

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.