Observer Name
Dave Weissbard
Observation Date
Thursday, March 11, 2010
Avalanche Date
Tuesday, March 9, 2010
Region
Provo » American Fork » Major Evans
Elevation
10,700'
Aspect
Southwest
Trigger
Snowmobiler
Avalanche Type
Soft Slab
Depth
2.5'
Width
250'
Vertical
500'
Comments
Major Evans avalanche. Probable soft slab, South West facing, starting around 10,700ft. Steepness unknown, depth estimated at 18-30inches. Width estimated at 250ft. Vertical around 500ft. Weak layer possibly sun crust, trigger possible snowmobile (a single track was observed coming out of the toe.) Avalanche was possibly a few days old on the 11th. In addition, a small 10ft wide, 1ft deep crossloaded windpocket was triggered from about 75 below on the climb up North East facing Mary Ellen at about 9900ft. Suspect cross loading from Saturday the 6ths unforecasted strong South East winds.
Coordinates
