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Avalanche Forecast

Archived

Apr 10th, 2022–Apr 11th, 2022

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.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

South Rockies.

Check for pockets of wind slab around steep and high-consequence features.

Confidence

Moderate - Uncertainty is due to the speed, direction, or duration of the wind and its effect on the snowpack.

Weather Forecast

Sunday night: Blustery with alpine flurries, up to 5 cm and higher amounts forecasted near Waterton NP. Increasing east wind. Ridgetop low -18 C.

Monday: Unsettled and convective. Light east wind gusty and increasing through the day. Ridgetop high -9 C.

Tuesday: Cloudy with isolated flurries. Moderate to strong east wind. Ridgetop high -10 C.

Wednesday: Mostly cloudy with sunny breaks. Moderate east wind. Ridgetop high -10 C.

Avalanche Summary

Last avalanche reports were from Thursday when warm temperatures initiated wet loose avalanches to size 1.5. 

Snowpack Summary

Up to 15 cm recent snow covers a crust on all aspects except high north terrain. Wind has impact snow at upper elevations, as it shifts east new wind slabs may reverse load features. The mid and lower snowpack is well settled and bonded.

Terrain and Travel

  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

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.