If NASA and SpaceX officials decide to attempt to launch SpaceX-3 to the International Space Station on Friday, there is a 40 percent chance of favorable weather. The Air Force 45th Weather Squadron issued its L-3 forecast, which predicts a chance of showers and thunderstorms that could result in violating the Thick Cloud, Lightning and Flight Through Precipitation rules.
Is 40% chance of good weather a good percentage for NASA to consider the launch? If not, what is?