coolthingoftheday: TOP TEN EIGHT MOST AMAZING WEATHER PICTURES 1. Mammatus clouds [x] 2. Lenticular clouds [x] 3. Undulatus asperatus [x] 4. Fallstreak hole [x] 5. Polar stratospheric cloud [x] 6. Cirrus Kelvin-Helmholtz clouds [x] 7. Anvil clouds [x]