significant meteorological phenomena hazardous to aviation (severe turbulence, icing, CB, ash). SIGMETs warn of weather phenomena that are significant to the safety of all aircraft: severe turbulence, severe icing, volcanic ash, etc.

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easyweather-considerations

SIGMETs warn of:

routine weather

clear air conditions

significant meteorological phenomena hazardous to aviation (severe turbulence, icing, CB, ash)

light rain

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