Lightning that flashes during a summer thunderstorm but doen't produce a thunderclap. Thia event usually occurs during the summer monsoon season when the outside temperture is so warm {90-110 degrees F that it doesn't produce the cool air that is needed to produce thunder.
A monsoon overlaped into the Southern Californis basin & produce a series of heat lightning strikes.
by BruinKiller3469 March 28, 2009