Earthquake Dome

Earthquake Dome
Submission Info
Friday, February 17, 2017 - 3:00pm
Red Flags: 
Recent avalanche activity
Recent loading by new snow, wind, or rain
Obvious avalanche path
Earthquake Dome
Snowpit Observations
More detailed information about the snowpack: 

Observer: doug lewis, Eastern Sierra Avalanche Center
Date: Feb 17, 2017, 8:07 PM
Loc: Earthquake Dome
Lat/Lon:37.66599, -118.99772
Elevation: 9200 f
Aspect: E Angle: 30°
Signs of Instability: Recent Avalanches
Sky Cover: OVC
Precipitation: Snow, Light snowfall - 1 cm/hour
Wind Speed: Calmsubjective
Current Temp: 0 to -5°C Trend:➘
New Snow 24-Hours:50cm Storm:50cm 
Boot Penetration: 75cm
Snow Stability: Poor
Stability on similar slopes:Poor
Avalanche Danger: Considerable

Comments: Extensive Loose Dry & Storm Slab activity on steeper terrain (35 degrees +) & on steep convex rolls. Mostly confined to top 20 cm. Some slides eroded into the low density new snow leaving a clear flank. Hand shears failing on isolation or VE, all 20cm down. 4 Stability Tests: ECTN1 Q3 20cm CT1 Q3 20cm CT1 Q3 20cm CTV Q3 20cm. Good skiing where undistured by avalanche activity. Faceshots in the truck on the access road. Access road to Lake Mary closed due to avalanche activity and mitiagation work. Numerous natural Soft Slab releases along the road to the gate. 

Snowpit or crown profile photo or graph: 
Weather Observations
Blowing Snow: 
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Air temperature trend: 
Wind Direction: 
Accumulation rate: 
Less than 1 in. per hour
More detailed information about the weather: 

Heavy snow in the AM hours, tappering off throughout the PM hours. 

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