Northern San Juan

Avalanche

Jasper Thompson · Mar 31, 2020 · Northern San Juan

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Weather

Clear and warm, too warm on E-S slopes, light winds coming from W through E with some snow transport off of peaks.

Snowpack

Sastrugi forming on N through E NTL and ATL. A 5-10cm breakable wind crust on N-E slopes above 12,000 feet. Lots of roller balls on E slopes.

Avalanche

We saw a natural Size 1.5 avalanche, 20cmx25m running 100m, on a SE facing slope in Lower Commodore near Barstow Mine. I suspect it was the storm snow from the last several days, sliding on a melt freeze crust, due to todays warmth and sun.