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Avalanche Forecast

Archived

Apr 23rd, 2025–Apr 24th, 2025

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

Regions

Purcells, Dogtooth, East Purcell, West Purcell.

Riders may still trigger wind slabs in the alpine.

Periods of low danger can be a good time to check out larger objectives.

Confidence

Moderate

Avalanche Summary

On Tuesday, there were several small natural dry loose avalanches when the recent snow saw the sun.

On Monday, several small skier-triggered wind slabs were reported on lee aspects in the alpine.

NOTE: Observations are currently very limited.

Snowpack Summary

Up to 20 cm of recent snow may be found at upper elevations. This snow overlies a thick crust everywhere except northerly aspects at in the alpine. Recent westerly wind may have formed small wind slabs on lee aspects in the alpine.

While weak layers lower in the snowpack have been a concern throughout the season, the current lack of avalanche activity and benign weather suggest they are not a concern at this time. They could become problematic again this spring when temperature rises significantly.

Weather Summary

Wednesday Night

Partly cloudy. 10 to 20 km/h north ridgetop wind. Treeline temperature -4 °C.

Thursday

Mix of sun and clouds. 20 to 30 km/h southeast ridgetop wind. Treeline temperature 0 °C. Freezing level 2500 m.

Friday

Sunny. 5 to 10 km/h southeast ridgetop wind. Treeline temperature 5 °C. Freezing level 2700 m.

Saturday

Sunny. 5 to 10 km/h north ridgetop wind. Treeline temperature 5 °C. Freezing level 2900 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully evaluate big and steep terrain features before committing to them.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.
  • Make observations and continually assess conditions as you travel.

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.