Garmin 010-00730-00 Manual De Usuario

Appendix

NEXRAD Radar is a Doppler radar system that has greatly 

improved the detection of meteorological events such as 

thunderstorms, tornadoes, and hurricanes. An extensive 

network of NEXRAD stations provides almost complete 

radar coverage of the continental United States, Alaska, 

and Hawaii, and the majority of Canada. The range of each 

NEXRAD is 124 nautical miles.

There are possible abnormalities regarding displayed 

NEXRAD images. Some, but not all, of those include the 

following circumstances:

Ground clutter
Strobes and spurious radar data
Sun strobes, when the radar antenna points directly at the 

sun
Military aircraft deployment of metallic dust (chaff), 

which can cause alterations in radar scans

•
•
•

•

Interference from buildings or mountains, which may 

cause shadows

Certain limitations exist regarding the NEXRAD radar 

displays. Some, but not all, are listed here for your 

awareness:

NEXRAD base reflectivity does not provide sufficient 

information to determine cloud layers or precipitation 

characteristics (for example, determining between hail 

and rain).
NEXRAD base reflectivity is sampled at the minimum 

antenna elevation angle. An individual NEXRAD site 

cannot depict high altitude storms at close ranges, and 

has no information about storms directly over the site.

•

•

•