Garmin G3X Touch Pilot's Manual page 217

Composite data from all the NEXRAD radar sites in the United States is shown. This
data is composed of the maximum reflectivity from the individual radar sweeps. The
display of the information is color-coded to indicate the weather severity level.
The display of radar coverage is always active when NEXRAD is selected. Areas
where NEXRAD radar coverage is not currently available or is not being collected are
indicated in grayish-purple.
NEXRAD Weather Legend (SiriusXM)
NEXRAD Abnormalities
There are possible abnormalities regarding displayed NEXRAD images. Some, but
not all, of those include:
• Ground clutter
• Strobes and spurious radar data
• Sun strobes, when the radar antenna points directly at the sun
• Military aircraft deploy metallic dust (chaff) which can cause alterations in radar
scans
190-02472-00 Rev. D
No Radar
Coverage
NEXRAD No Radar Coverage
Garmin G3X Touch ™
Hazard Avoidance
NEXRAD Weather Legend (FIS-B)
Pilot's Guide for Certified Aircraft
195