Garmin Pilot User's Guide for iOS User Manual page 144

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SIGMETS
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, dust storms,
and sandstorms that lower visibility to less than three statute miles.
A Convective SIGMET is issued for the following conditions: 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. SIGMETs are displayed as a yellow-dashed line.
Viewing AIRMETS and SIGMETS:
1) From any page touch
2) Touch
3) Touch Map Overlay Control Button and select the desired type of AIRMET/
SIGMET (i.e., Convective, Icing, IFR/MTN, or Turbulence) to display.
4) Touch within the shaded area for AIRMET/SIGMET details.
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select 'AIR/SIGMETs' from the Map Overlay menu.
AIRMET/SIGMET Overlay
Garmin Pilot for iOS User's Guide
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190-01501-00 Rev. D