Northern San Juan

Avalanche

Josh Vincent · Nov 15, 2020 · Northern San Juan

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Weather

Moderate - strong winds from SW. Upper champion was very wind affected.

Snowpack

No signs of instability on ascent. Some windslabs developed as I approached treeline. Thin crust present on more southerly aspects under a dusting of new snow.

Avalanche

I triggered a D2 avalanche on a 30 degree convex roll. The avalanche was 30cm - 90cm deep. It was approximately 15m wide and ran about 200 vertical feet. The avalanche broke on facets at the ground. The avalanche occurred at 11,600 and was on a West facing slope below treeline.