Quote
NASA shuttle weather experts consistently predicted a 60 percent chance that weather around Discovery's Pad 39B launch site could prevent today's liftoff. Anvil clouds - a potential source of triggered lightning during launch - from inland thunderstorms are among the primary concerns. But earlier this morning, conditions changed. Discovery now has a 60 percent chance of launching into space, with only a 40 percent chance of anvil clouds and inland thunderstorms affecting the space shot.