[MCR] Large avalanche potential in the Rockies

[Public Mountain Conditions Report]

A large natural avalanche occurred on Mt. Stephen within the last 24 hours 
(see picture of avalanche deposit below).  This avalanche was triggered at 
high elevation by a serac fall on a glacier which entrained a large amount 
of wet snow. This event demonstrates that the potential for large loads 
(ie. seracs/ cornices) to trigger large avalanches and entrain wet snow 
still exists when surface crusts are thin or non-existent (ie. warm days/ 
nights).  The avalanche ran over 2 km, with a 1200m vertical drop to the 
dry valley bottom.



Ian Jackson
Visitor Safety Technician / ACMG Aspirant Guide
Banff, Yoho, Kootenay National Parks
www.parksmountainsafety.ca
www.parcsecuritemontagne.ca
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