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Avalanche Forecast

Archived

Apr 21st, 2024–Apr 22nd, 2024

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Northwest Coastal, Northwest Inland, Boundary, Kitimat, Nass, Rupert, Seven Sisters, Shames, Stewart, Howson, Kispiox, Microwave-Sinclair, Ningunsaw, Ningunsaw, Ningunsaw, North Bulkley, South Bulkley, South Bulkley, South Bulkley, Telkwa.

Hazard may increase to moderate in localized alpine areas that receive more than 15 cm of new snow.

Watch for wind-loaded pockets especially around ridgecrests and in extreme terrain.

Confidence

Moderate

Avalanche Summary

No new avalanches were reported in this region on Saturday. However, field observations are currently very limited in this region.

Please consider sharing your observations to the Mountain Information Network.

Snowpack Summary

In localized areas that receive more than 15 cm of new snow, fresh wind slabs may form on lee features in the alpine.

A hard melt-freeze crust exists on the snow surface on sun-exposed slopes to the mountain tops. The crust will transition to wet snow with daytime warming and generally re-freeze at night.

Dry snow and small isolated wind slabs may still exist on shady slopes in the high alpine.

Cornices are large and may become weak with daytime warming.

Weather Summary

Sunday night

Cloudy with isolated flurries, 0 to 10 cm of snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1000 m.

Monday

Mix of sun and cloud. 10 to 20 km/h south ridgetop wind. Treeline temperature +2 °C. Freezing level 1600 m.

Tuesday

Mix of sun and cloud. 30 to 40 km/h south ridgetop wind. Treeline temperature 0 °C. Freezing level 1400 m.

Wednesday

Mostly cloudy with isolated flurries, 0 to 3 cm snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1300 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
  • Be alert to conditions that change with aspect and elevation.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Back off slopes as the surface becomes moist or wet with rising temperatures.

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.