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Avalanche Forecast

Archived

Feb 8th, 2025–Feb 9th, 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.

Slabs over the January 30 weak layer are showing signs of becoming reactive to skier traffic.

The cold temps continue. Make sure you have the gear to stay warm if any unexpected delays occur.

Confidence

No Rating

Avalanche Summary

Skiers triggered a sz 1.5 slab on the Jan. 30 layer at treeline below Wapta Peak Friday and there has been significant evidence of mid-storm failures observed in this region over the last week.

There was a remotely triggered avalanche just southwest of our region that likely failed on the Jan. 30th layer on Wednesday.

Also nearby, Lake Louise reported triggering a couple of sz 1.5 slabs on the Jan 30 crust on E and SE aspects at TL and above Friday.

Snowpack Summary

30-40 cm of snow from last weekend has been affected by the wind in exposed locations. This recent snow has buried a weak layer (dated January 30) which is starting to show signs of becoming active as slab properties develop. The mid and lower snowpack is well settled, with snowpack depths at the treeline ranging from 120cm to 180cm.

Weather Summary

Saturday evening W-SW winds are expected to diminish to light and shift NW as the Arctic ridge re-asserts itself further over the next few days. Overnight lows at treeline near -26C.

Cloud is still in the forecast for Sunday and the winds are to increase back to the moderate to strong range in the alpine as temperatures approach -17C for the high at treeline.

Clearing trend for Monday as the temperatures tick lower.

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.