AIRMETS - non-convective (e.g.,. icing)
SIGMETS - convective
Are put out by the NWS and are posted on the METOC
CAWW - CINATRA
(Chief of Naval Education and Training) Area Weather Warning.
METOC can put these out; they are like SIGMETS, but
whereas a SIGMET is a forecast, a Warning is for something that is
happening. CAWWs are only valid for
training--it grounds the training aircraft.