The Sky's Not Falling, Sometimes It Just Seems That Way

Sudden showers can occur in strong (or even weak) convection, and might intensify with surprising quickness.   They may be forecast, but often are not.   Unusually early cumulus development warns the perceptive pilot to anticipate eventual over-development.   Big clouds growing elsewhere, especially upwind or above higher terrain, generally suggest a probability of more to come where you are...And hail is something you should run from.   Just GET AWAY!