Insufficient observations exist to reliably rate the avalanche danger. Expect shallow snow cover with thinly buried rocks and trees just beneath the surface. Avalanche danger often concentrates in gullies and other deposition areas, where windslabs may bond poorly to a weak underlying base. Deeper snow usually exists at higher elevations.
Early season snow has arrived early this fall, and although Banff and Yoho Parks did not receive the heavy dump that fell to the east, there is now enough snow for avalanches and keen early-season climbers and skiers should be prepared.
Deep persistent slabs are best managed by:
Cornices are best managed by:
Check Environment Canada for updates to the Banff and Yoho National Park forecast. Long-term (10 day) models are showing more snow every few days for the first part of October. Expect a few nice days, then some snow, then nice again. Temperatures are look like they will remain cool.
The giant upslope storm that hit Alberta at the end of September did not hit Banff Park as hard. As of October 1 there is 15 cm on the ground at treeline Sunshine Village and Mt. Bosworth. Expect drifted areas on the Wapta Icefields of up to 100 cm in leeward areas. Winds will be moving snow and creating windslabs in leeward areas in the alpine.
Small windslabs have been reported in alpine areas, but no significant natural avalanches have been observed yet. Expect this to change and avalanche activity to increase as October progresses.