Northern San Juan

Avalanche

Anonymous · May 18, 2019 · Northern San Juan

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Weather

Sustained moderate SW winds, gusting to upper moderate N & ATL. Intermittent pulses of S1 snowfall. 20s°F ATL. Sky was BKN to OVC.

Snowpack

Supportable snowpack on a generally westerly uptrack. 4-6" new snow NTL, 6-8" new snow ATL. 10-12" thick soft storm slabs adjacent to lee ridges.

Avalanche

Triggered D1 (100'x200'x1') soft slab from ridge on uptrack by releasing fresh cornice onto slope, NE aspect @ 12500, 35-40° slope. Triggered another D1+ (50'×400'×1') soft slab on ski cut, NNW aspect, 12500, 35-40° slope. Did not observe any natural avalanche activity.