Banff Yoho Kootenay

As we transition into winter, we're starting to see the first significant avalanche's of the year. Ice climbers in particular should be mindful of the terrain above their head and below their feet.

There have been numerous reports of natural and explosive triggered avalanches up to size 2 within the last 48h in the alpine. Skier controlled avalanches were reported by Sunshine ski hill up to size 1 at tree line. Dry loose avalanches have also been reported by climbing parties.

The recent storm has brought an additional 10-30cm's of new snow to the region. Total snow depth's vary significantly with elevation, the deepest areas being lee features of the alpine where 50-70cm has been reported. There are generations of winds slab within the snowpack, which overlay a very weak base. Wind slabs have failed naturally within the last 48h, up to size 2.

5-10 cm's of new snow with moderate to strong winds out of the south west are expected tomorrow, with greater snow fall amounts on the 93N. The storm is forecast to arrive through the afternoon, with an alpine high of -3C.

For more info please see the Mountain Weather Forecast.

• Avoid exposure to overhead avalanche terrain during periods of heavy loading from new snow, wind or rain.
• Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.