Propagating Results in Near Treeline Terrain above Convict.

McGee/Aggie Col
Submission Info
Volunteer Observer
Friday, January 18, 2019 - 2:30pm
Red Flags: 
Recent avalanche activity
Whumphing noises, shooting cracks, or collapsing
Recent loading by new snow, wind, or rain
Rapid warming
37° 34' 2.1396" N, 118° 49' 57.7236" W
Snowpit Observations
More detailed information about the snowpack: 

Toured from Morrison Cemetery to saddle between McGee and Aggie. Coverage is adequate to skin and snow is supportable. 

Most paths on North side of McGee ran during storm, up to size 3 (see photo). Other smaller paths ran to size 2 in terrain that might not be considered representative avalanche terrain. 

Snowpack observations were taken at a site at 9900', N aspect on a 24 deg. slope in moderately spaced trees. HS 155cm. Windslabs were confirmed with CT11 SP down 19 and CT16 SP down 48. Persistent slab was confirmed with CT19 SC down 120. Repeated testing with large column tests indicated propagation with ECTP3 down 19, ECTP13 down 48 and ECTP14 down 120. 

Ski quality ranged from a few decent turns on reasonably supportive old bed surface, to wind board/refrozen sun crust/breakable combat skiing. 

Snowpack photos: 
Weather Observations
Blowing Snow: 
Cloud Cover: 
75% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Air temperature trend: 
Wind Direction: 
More detailed information about the weather: 

Broken sky led to obscured sky with high clouds by midday. Strong solar radiation and light to moderate winds in ATL elevations.

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