Garmin GPSMAP 695/696 Owner’s Manual 190-00919-00 Rev. D94hazard avoidanceOverviewGPS NavigationFlight PlanningHazard AvoidanceAdditional FeaturesAppendicesIndexxM Satellite weather PrOductSNEXRADNEXRAD (NEXt-generation RADar), is a network of 158 high-resolution Dopplerradar systems that are operated by the National Weather Service (NWS). NEXRAD dataprovides centralized meteorological information for the continental United States andselected overseas locations. The maximum range of a single NEXRAD radar site is 250nm. In addition to a wide array of services, the NEXRAD network provides importantinformation about severe weather and air traffic safety.NEXRAD data is not real-time. The lapsed time between collection, processing, anddissemination of NEXRAD images can be significant and may not reflect the currentradar synopsis. Due to the inherent delays and the relative age of the data, it shouldbe used for long-range planning purposes only. Never use NEXRAD data or any radardata to penetrate hazardous weather. Rather, use it in an early-warning capacity ofpre-departure and enroute evaluation.Composite data from all the NEXRAD radar sites in the United States is shown. Thisdata is composed of the maximum reflectivity from the individual radar sweeps. Thedisplay of the information is color-coded to indicate the weather severity level.The display of radar coverage is always active when NEXRAD is selected. Areaswhere NEXRAD radar coverage is not currently available or is not being collected areindicated in grayish-purple (Weather (WX) Page Only). Radar capability exists in theseareas, but it is not active or is off-line.neXrAd AbnormAlitiesThere are possible abnormalities regarding displayed NEXRAD images. Some, butnot 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 radarscans• Interference from buildings or mountains, which may cause shadows
