TermSIGMET
Business termSIGMET or Significant Meteorological Information
Description

A weather advisory that contains meteorological information concerning the safety of all aircraft. Format specified by ICAO Doc 8896 manual of aeronautical meteorological practice.

https://skybrary.aero/articles/sigmet

https://skybrary.aero/bookshelf/books/2506.pdf

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Comments

Example: 

ENOR NORWAY FIR SEV TURB FCST WI N5720 E00800 - N6200 E00730 – N6200E01050 - N5820 E01000 - N5720 E00800 FL220/320 MOV SW 5KT WKN=

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