Northern San Juan

Avalanche

Mark Allen · Feb 10, 2014 · Northern San Juan

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Weather

Red Mountain Pass 12,000ft, East Aspect. Blow snow: Intense Alpine all el. Moderate near TL. BTL None S-1 10:00am => S-3 3:30pm Ski pen-20cm-40cm. Boot pen-thigh. Surf Form-3mm Gropple and Stellar Rafts. HS 240cm HN24 12"

Snowpack

Quick Obs test site: 11,700ft NW aspect Near TL: HS-240cm High Density Slab: 90cm F=>P CTE SP 35cm X2 CTM SP 45cm x2 CTH SP 60cm These are three reactive interfaces in the recent snow events. There were no reactions from the surface CT at the persistent interface at 90cm. On the second CT test the block failed at 35 and 45cm upon isolation

Avalanche

Two collapses while skinning BTL on an East aspect at 11,700ft Shooting crack ran the top of a 38+ degree small E aspect feature