Overall didn’t see many signs, cracking or whoomping. Just a couple of releases on steep slopes on both side of the highway. There were no riders observed around this avy when it triggered. Thank goodness.
These are some intense photos of the Widow Maker slide path and avalanche in action. This is the same slope that avalanched in 2008 that sadly resulted in two snowmachine fatalities: http://www.cnfaic.org/accidents/avy021508.htm