Convective storm detection is the observation of deep, moist convection (DMC); this term includes the minority of storms which do not produce lightning and thunder. Convective storms produce tornadoes as well as large hail, strong winds, and flash flooding. The detection of convective storms relies on direct eyewitness observations, for example from storm spotters; and on remote sensing, mostly weather radar. Some in situ measurements are used for direct detection as well, notably, wind speed reports from surface observation stations. It is part of the integrated warning system, consisting of prediction, detection, and dissemination of information on severe weather to the public.