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Avalanches on Gray Butte
Two small (R1/D1.5) storm slab avalanches were skier-triggered along the knife edge ridge approaching the summit of Gray Butte.
Crown was 35-45 cm (14-18 in) in height and spanned about 40 ft. Runout length was about 120 ft, about 1/3 the distance of the slope.
One avalanche was triggered on an east facing slope with a start zone near 40 degrees. The other was on a west facing slope. Avalanches had similar characteristics.
The fist-hard slab failed within the new storm snow on a density break about 7 cm (3 in) above new/old snow interface. Height of storm snow (HST) was 45 cm (18 in). New snow sits atop a soft crust.
Avalanche Classification Code: SS-ASu-R1-D1.5-S