SIGMET

noun

SIG·​MET

variants or less commonly sigmet

ˈsig-ˌmet 

plural SIGMETs also sigmets

: a notice of significant hazardous weather conditions (such as extreme turbulence, icing, or poor visibility) in a large area that is provided to the pilot of an aircraft before takeoff compare airmet

Word History

Etymology

significant meteorological information

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