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Avalanche Forecast

Archived

Apr 22nd, 2024–Apr 23rd, 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.

Watch for isolated pockets of wind slab in leeward alpine features and back off sun exposed slopes during the heat of the day.

Confidence

Low

Avalanche Summary

No recent avalanche activity has been reported.

Snowpack Summary

Up to 10 cm of recent snow is becoming moist on sunny aspects and at lower elevations. The recent snow sits over a series of widespread melt-freeze crusts on all but high north-facing alpine terrain, where snow is dry and likely wind affected.

Weather Summary

Monday night

Clear. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1900 m.

Tuesday

A mix of sun and cloud. 20 to 30 km/h southeast ridgetop wind. Treeline temperature +2 °C. Freezing level 2200m.

Wednesday

A mix of sun and cloud with flurries bringing a trace. 30 to 40 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1800m.

Thursday

A mix of sun and cloud. 20 to 40 km/h northwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1700m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Back off slopes as the surface becomes moist or wet with rising temperatures.
  • 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.
  • 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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.