Garmin Pilot Guida Utente

190-01532-00  Rev. G

58

An AIRMET (AIRmen’s METeorological Information) can be especially helpful for 

pilots of light aircraft that have limited flight capability or instrumentation.  An AIRMET 
must affect or be forecasted to affect an area of at least 3,000 square miles at any one 
time.  AIRMETs are routinely issued for six-hour periods and are amended as necessary 
due to changing weather conditions.  AIRMETs are displayed as green (IFR/mountain 
obscuration), orange (turbulence), or blue (icing) shaded areas on the map display.

A SIGMET (SIGnificant METeorological Information) advises of weather that is 

potentially hazardous to all aircraft.  In the contiguous United States, the following 
items are covered: severe icing, severe or extreme turbulence, volcanic ash (red), dust 
storms, and sandstorms that lower visibility to less than three statute miles.

A Convective SIGMET is issued for thunderstorms, isolated severe thunderstorms, 

embedded thunderstorms, hail at the surface, and tornadoes.

A SIGMET is widespread and must affect or be forecast to affect an area of at least 

3,000 square miles.

1)  From any page, tap Home > Map.
2)  Tap 

 and select AIRMET/SIGMET from the Layer Select menu. 

3)  Tap 

 and select the desired type of AIRMET/SIGMET (i.e., Convective, 

Icing, IFR/MTN, or Turbulence) to display.

4)  Tap within the shaded area for AIRMET/SIGMET details.