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Avalanche Forecast

Archived

Feb 25th, 2025–Feb 26th, 2025

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

Regions

Kananaskis, Bow Valley, Highwood Pass, North 40, Spray - KLakes.

Stay diligent with terrain choice. Human triggered avalanches are likely. Now is the time for conservative decision making.

Confidence

Low

Avalanche Summary

A snowstudy flight today was unfortunately obscured mostly by cloud. However there was some visibility and a wide spread avalanche cycle appears to have happened along the spray. Most crowns were mostly filled in from the recent strong to extreme winds.

Travel in avalanche terrain requires cautious route-finding and conservative decision making.

Snowpack Summary

This last storm has deposited between 10-25cm snow (10cm to the North of the Spray and 25cm near the Dogleg area). Expect another 5-10cm by Tuesday morning. The milder temperatures along with strong winds have settled most of this snow into some sort of slab at all elevations. Recent strong/extreme winds in the Alpine have most likely left some widespread wind slabs, especially in lee features and cross loaded gullies. All of this is sitting on top of the Jan 30 interface (mostly a denser layer) and then below this is all facets. The forecasters do not trust the snowpack at the moment and are staying clear of avalanche terrain.

Weather Summary

Wednesday: Cloudy with sunny periods.

No precip expected with alpine temps at -3

West winds continue at 35km/h

Freezing levels at 1600m

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Fresh snow rests on a problematic persistent slab, don't let good riding lure you into complacency.
  • Avoid steep terrain, including convex rolls, or areas with a thin, rocky, or variable snowpack.
  • Wind slabs are most reactive during their formation.
  • Be careful as you transition into wind-affected terrain.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.

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.