Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Apr 2nd, 2024–Apr 3rd, 2024

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

Regions

Purcells, Dogtooth, East Purcell, West Purcell.

Recent wind has formed wind slabs on lee features at treeline and above.

Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.

Confidence

High

Avalanche Summary

Numerous natural and rider triggered wet loose avalanches up to size 2 were reported on sunny aspects on Monday.

A sled triggered size 1 wind slab was also reported on a northeast aspect at treeline.

Snowpack Summary

Strong solar radiation has formed a surface crust everywhere except true north facing terrain at upper elevations.

Recent wind has formed wind slabs on lee features at treeline and above.

A widespread crust with facets above is down 60 to 110 cm. This layer is unlikely to human trigger in areas where a thick crust below the recent snow is present. However, steep or convex terrain features with a shallow or thin to thick snowpack at treeline and above are the most likely places where it may be possible to trigger this layer with large loads.

Weather Summary

Tuesday Night

Mostly cloudy with isolated flurries, 0 to 15 cm snow. 30 to 40 km/h southwest ridgetop wind. Treeline temperature 1° C. Freezing level 2100 m.

Wednesday

Mix of sun and cloud with isolated flurries, 0 to 5 cm snow. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -2° C. Freezing level 1800 m.

Thursday

Cloudy with isolated flurries, 0 to 5 cm snow. 10 to 20 km/h east ridgetop wind. Treeline temperature -3° C. Freezing level 1700 m.

Friday

Mix of sun and cloud. 10 to 20 km/h east ridgetop wind. Treeline temperature 0° C. Freezing level 2000 m.

Check out the Mountain Weather Forecast for additional weather information.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.

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.