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Avalanche Forecast

Archived

Feb 16th, 2025–Feb 17th, 2025

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

Regions

Little Yoho.

Monday looks like a great time to be up high but watch for the effects of solar warming later in the day. Ski quality varies from poor in wind-exposed areas to good in sheltered spots. Be cautious of lingering wind slabs and the continued facetting of the surface snow, which may sluff easily in steep terrain.

Confidence

High

Avalanche Summary

Some skier-triggered small wind slabs were reported on Saturday up to size 1. Local ski areas also reported small wind slabs on Sunday, up to size 1.5 triggered with explosives along with some small, loose, dry avalanches in steep terrain.

Snowpack Summary

25-30 cm of settled snow from last week has been redistributed by the wind in exposed locations, burying the Jan 30 weak layer, and in isolated locations formed now what are aging wind slabs. Specific areas exposed to the wind may have strastrugi. The mid and lower snowpack is well settled, with tree-line snow depths ranging from 120 cm to 180 cm.

Weather Summary

Monday: Mainly sunny with light NW winds at ridgetop. Treeline temperatures steady between -12 to -15°C.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected terrain.
  • Wind slabs are isolated, but may remain reactive.
  • Closely monitor how the new snow is bonding to the old surface.

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.