Grand Daddy - variable snow with cornice failure
Banff Yoho & Kootenay National Park
tmansfield , Sunday 2nd May, 2021 11:25AM
Solar punch was huge. Solar changing conditions in less then 10 minutes. Variable conditions from soft fresh snow to visible ice in the same turn. Backed off line at 3/4 of way up due to large cornice failure. Pooped our pants as cornice failed on adjacent coulior at around 825am. Better to drink beer then worry about the other bus size cornice above our head in the sun. There is still a large cornice at the lookers right of the Y close to the top of the coulior that sits in the sun first thing
Snow conditions were: Crusty, Hard, Powder. Weather conditions were: Cloudy, Sunny, Warm. We rode: Steep slopes. Riding quality was terrible.
Avalache Conditions: Rapid temperature rise to near zero degrees or wet surface snow.
Witnessed cornice failure at 830am after about 15 minutes of intense sun exposure. Uv index would be very high