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Avalanche Forecast

Archived

Apr 3rd, 2024–Apr 4th, 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

Lizard-Flathead, South Rockies, Flathead, Lizard, Bull, Elkford East, Elkford West.

New snow and strong east wind may form reactive wind slabs on lee features at treeline and above.

Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.

Confidence

Moderate

Avalanche Summary

Numerous naturally triggered wet loose avalanches up to size 2 were reported on all aspects in the alpine on Tuesday.

Data is limited in this region. Please consider posting your observations to the Mountain Information Network.

Snowpack Summary

10 to 20 cm of forecast snow and strong easterly wind may form reactive wind slabs on lee features at treeline and above. The new snow overlies a crust on all aspects and elevations.

A persistent weak layer of facets are sitting on top of a second buried crust down 100 to 180 cm. This layer is unlikely to human trigger in areas where a thick crust above the weak layer is present.

Weather Summary

Wednesday Night

Cloudy with flurries, 5 to 10 cm. 20 to 30 km/h east ridgetop wind. Treeline temperature -3° C. Freezing level 1600 m.

Thursday

Cloudy with isolated flurries, 3 to 10 cm. 40 to 50 km/h east ridgetop wind. Treeline temperature -4° C. Freezing level 1600 m.

Friday

Mostly sunny. 10 to 20 km/h east ridgetop wind. Treeline temperature -1° C. Freezing level 1900 m.

Saturday

Cloudy with isolated flurries, 0 to 5 cm snow. 10 to 20 km/h north ridgetop wind. Treeline temperature -2° C. Freezing level 1700 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

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Avoid freshly wind loaded terrain features.
  • Wind slabs may be poorly bonded to the underlying crust.

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.