This large deep slab avalanche broke on Mt. Henderson on the afternoon of 2/15/19 during strong winds. New snow and strong wind this past week has formed fresh drifts that are easy to trigger. This heavy, steady wind loading pushed deep weak layers to break. With more heavy loading from new snow and wind we will see more large avalanches like this. Photo: GNFAC
Advisory Year
Avalanche Details: Deep slab on Henderson
Forecast link: GNFAC Avalanche Forecast for Sat Feb 16, 2019
Cooke City, 2019-02-15
Forecast link: GNFAC Avalanche Forecast for Sat Feb 16, 2019