12-9190-01007-03 Rev. B Garmin GTN 725/750 Pilot’s GuideForewordGettingStartedAudio &Xpdr CtrlCom/NavFPLDirect-ToProcChartsWpt InfoMapTrafficTerrainWeatherNearestMusicUtilitiesSystemMessagesSymbolsAppendixIndex12.1.5 NEXRADWSR-88D, or NEXRAD (NEXt-generation RADar), is a network of 158 high-resolution Doppler radar systems that are operated by the National WeatherService (NWS). NEXRAD data provides centralized meteorological informationfor the continental United States and selected overseas locations. The maximumrange of a single NEXRAD radar site is 250 NM. The NEXRAD network providesimportant information about severe weather for air traffic safety.NEXRAD data is not real-time. The lapsed time between collection,processing, and dissemination of NEXRAD images can be significant and maynot reflect the current radar synopsis. Due to the inherent delays and the relativeage of the data, it should be used for long-range planning purposes only. Neveruse NEXRAD data to penetrate hazardous weather. Instead, use it in an early-warning capacity of pre-departure and en route evaluation.Composite data from all the NEXRAD radar sites in the United States is shown.Canadian radar data provided by Environment Canada. This data is composedof the maximum reflectivity from the individual radar sweeps. The display of theinformation is color-coded to indicate the weather severity level.NOTE: Due to similarities in color schemes, the display of Echo Tops cannotbe shown with Cloud Tops and NEXRAD.1. While viewing the Datalink Weather menu, touch the NEXRADkey to step through the NEXRAD selections.Present PositionNEXRAD WeatherAge Of SelectedWeatherProductsFigure 12-7 NEXRAD Weather
