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Avalanche Forecast

Archived

Apr 14th, 2025–Apr 15th, 2025

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

Regions

Purcells, Dogtooth, East Purcell, Bull.

Avoid thin, shallow northerly slopes up high where it remains possible to trigger buried weak layers. Avalanches are unlikely where a hard surface crust exists.

Confidence

Moderate

Avalanche Summary

We didn't receive any reports of avalanche activity over the weekend.

The latest slab avalanche occurred on Friday, triggered by sledders east of Wasa (see photo).

Snowpack Summary

Around 5 cm of recent snow overlies a hard melt-freeze crust on northerly alpine slopes. Elsewhere, a hard and thick crust is on the snow surface. The crust will likely soften with daytime warming and refreeze overnight.

The lower snowpack is generally composed of weak faceted grains.

The snowpack at lower elevations is rapidly melting.

Weather Summary

Monday Night

Mostly clear skies. 10 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 2100 m.

Tuesday

Mostly cloudy with 0 to 2 cm of snow. 10 to 20 km/h west ridgetop wind. Treeline temperature +2 °C. Freezing level 2300 m.

Wednesday

Mix of sun and clouds. 10 to 20 km/h north ridgetop wind. Treeline temperature -2 °C. Freezing level 1700 m.

Thursday

Mostly sunny. 10 km/h north ridgetop wind. Treeline temperature -2 °C. Freezing level 1700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Problems

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.