The 142nd and final avalanche advisory for the 2017/2018 season was published on April 22nd. Thank you to all who have supported the avalanche center through volunteer hours, field observations, and financial support.
Wind Slabs in the Bronco Area
Mount Rose Area
Date and time of observation:
Fri, 01/26/2018 - 16:00
United States39° 19' 2.7804" N, 119° 57' 42.0876" W
Recent avalanche activity
Recent loading by new snow, wind, or rain
Obvious avalanche path
The Relay area's new snow depth varied greatly with wind deposition. Sheltered below treeline terrain had upwards of 20" in places. Snowmobile and skier traffic on the West side of Relay Ridge showed minimal signs of instabilities across all aspects even on wind loaded terrain. Within the Wilderness boundary informal tests produced minimal signs of instabilities. The Bronco area generally revealed similar results but had an increase in reactive wind slab occurrence. A ski cut on wind loaded complex terrain triggered a D2 avalanche. The bed surface was the old / new snow interface. The crown measured 30-40cm and slid the width of the chute approximately 15' and ran for 300-400'. The slope was approximately 45 degrees. Another potential wind slab avalanche was seen in the Bronco area but lighting and distance made discerning details difficult.