The Yellowstone Club Ski Patrol observed tons of surface hoar crystals on Jan 29. Some were nearly 1 cm in size. These can become a future weak layer once a slab of snow forms on top of them. Think of a stack of bricks (slab) resting on potato chips (surface hoar). Hopefully strong winds will return knock down these crystals before snow falls. Photo: YCSP
Forecast link: GNFAC Avalanche Advisory for Fri Jan 30, 2015GNFAC Avalanche Advisory for Sat Jan 31, 2015GNFAC Avalanche Forecast for Sun Feb 1, 2015GNFAC Avalanche Advisory for Mon Feb 2, 2015GNFAC Avalanche Advisory for Tue Feb 3, 2015GNFAC Avalanche Advisory for Wed Feb 4, 2015GNFAC Avalanche Advisory for Thu Feb 5, 2015