This wind slab was triggered by a ski patroller in a closed area at Big Sky. Photo. BSSP Advisory Year 16-17 Forecast link: GNFAC Avalanche Advisory for Sun Jan 29, 2017GNFAC Avalanche Advisory for Mon Jan 30, 2017Northern Madison, 2017-01-29Access other image sizes:Very Large 1200pxLarge 480pxMedium 220pxSmall 150pxOriginal