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Avalanche Forecast

Archived

Apr 21st, 2024–Apr 22nd, 2024

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

Regions

North Rockies, East Kakwa, Kakwa, McGregor, Pine Pass, Tumbler.

Evaluate your line for pockets of wind slab, especially around ridgecrest and in extreme terrain.

Confidence

Moderate

Avalanche Summary

No recent avalanche activity has been reported.

Snowpack Summary

A dusting of new snow sits over a widespread melt-freeze crust on all but high north-facing alpine terrain, where snow remains dry and wind affected.

Weather Summary

Sunday night

Cloudy with a trace of snow at upper elevations. 40 to 60 km/h west ridgetop wind. Treeline temperature -3 °C. Freezing level 1400 m.

Monday

Clouds clearing through the day. 20 to 40 km/h northwest ridgetop wind. Treeline temperature -1 °C. Freezing level rising to 1900m.

Tuesday

A mix of sun and cloud. 20 to 40 km/h southeast ridgetop wind. Treeline temperature 0 °C. Freezing level 2300m.

Wednesday

Flurries bringing up to 5 cm of snow at upper elevations. 40 to 60 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1900m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Small avalanches can have serious consequences in extreme terrain. Carefully evaluate your line for wind slab hazard before you commit to it.
  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.
  • 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.