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Avalanche Forecast

Archived

Apr 8th, 2025–Apr 9th, 2025

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

Regions

Kootenay Boundary, Bonnington, Grohman, Kootenay Pass, Norns, Rossland, Ymir, Kokanee.

Storm slabs need time to settle and bond. The best and safest riding will be in high elevation spots, unaffected by the wind.

Confidence

Moderate

Avalanche Summary

On Monday, there were numerous, small, natural and rider-triggered wet loose avalanches, up to size 1.5.

Snowpack Summary

Snowfall is expected to continue overnight, easing Wednesday morning. Bringing expected storm totals to 30 to 50 cm. The new snow is likely sitting on a crust up high or moist snow down low.

The upper snowpack is wet, with several softening crusts. Several weak layers from early March, mid-February, and late January can be found in the mid and lower snowpack.

The remainder of the snowpack is generally well settled.

Weather Summary

Tuesday Night

Cloudy with 5 to 10 cm of snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -2 °C.

Wednesday

Cloudy. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1800 m.

Thursday

A mix of sun and cloud. 30 to 40 km/h south ridgetop wind. Treeline temperature +2 °C. Freezing level 2500 m.

Friday

A mix of sun and cloud. 20 km/h southwest ridgetop winds. Treeline temperature 0 °C. Freezing level 2000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Be alert to conditions that change with elevation, aspect, and exposure to wind.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.

Problems

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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.