Onion Valley avalanche activity and snow conditions

Onion Valley road
Submission Info
Volunteer Observer
Sunday, March 10, 2019 - 8:45am
Onion Valley road 36° 46' 38.0352" N, 118° 19' 13.512" W
Snowpit Observations
More detailed information about the snowpack: 

The Onion Valley Road has a soft closure at Seven Pines, but the road can be driven up to about 7000' (1/4 mi. below the Sardine/Rex Montis road).  The storm of 3/5-3/6 put down about 60 cm of sticky new snow at 7000' and about a meter at 8200'.  Total snow depth at 8200' is around 120 cm and the parking lot at Onion Valley looks like it has maybe 2 meters total snow depth (see photo).

Recent avalanche activity includes avalanches that appear to have come down during the 3/5-3/6 storm up to D2 in size, the largest reaching the road just past the Sardine hairpin, as well as post-storm point releases initiated in steep rocky chutes on the SE flanks of Kearsarge Peak.  The largest that we observed crossed the road at the point indicated on the map, D2 in size.  The point releases came down sometime between mid-day Thursday and Saturday morning, i.e., well after the storm cleared out, apparently triggered by solar input.  South and east exposures are have well developed suncrust, several cm thick in places.   

Snowpack photos: 
Onion Valley pack station on 3/7/19
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