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Avalanche Forecast

Archived

Apr 22nd, 2025–Apr 23rd, 2025

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

Regions

Lizard-Flathead, South Rockies, Akamina, Flathead, Lizard, Crawford, Moyie, St. Mary, Bull, Crowsnest North, Crowsnest South, Elkford East, Elkford West.

Small wind slabs may linger on northerly aspects in isolated locations below alpine ridgetops.

Confidence

Moderate

Avalanche Summary

On Monday, a few naturally triggered storm slabs and wet loose avalanches up to size 1.5 were reported in the alpine near Fernie.

NOTE: Observations are currently very limited in this region.

Snowpack Summary

Up to 30 cm of recent snow in localized areas and strong variable wind may have formed wind slabs on lee slopes at upper elevations. However, triggering these slabs will become unlikely on sunny slopes that have a sun crust.

This snow overlies a robust crust everywhere except northerly aspects at upper elevations, where previous snow surfaces may have remained dry.

The mid/lower snowpack is well settled and strong.

Lower elevations are melting out rapidly.

Weather Summary

Tuesday Night

Clear skies. 5 to 10 km/h west ridgetop wind. Treeline temperature -4 °C. Freezing level valley bottom.

Wednesday

Sunny. 5 to 10 km/h northwest ridgetop wind. Treeline temperature 3 °C. Freezing level 2400 m.

Thursday

Sunny. 20 to 30 km/h east ridgetop wind. Treeline temperature 5 °C. Freezing level 2600 m.

Friday

Mix of sun and cloud. 20 to 30 km/h east ridgetop wind. Treeline temperature 4 °C. Freezing level 2500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully evaluate steep lines for wind slabs.
  • Avoid sun-exposed slopes, especially if the snow surface is moist or wet.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.

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.