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 Relevant information about this radar page
The National Weather Service and Department of Defense operate 155 "next-generation radar" (NEXRAD) sites, also known as Weather Surveillance Radar 1988 Doppler (WSR-88D). Data from these radars are collected and derived products are distributed via NIDS - NEXRAD Information Dissemination Service. The Radar link above provides real-time imagery from each of the radars and a Unidata national mosaic product. The images are generally updated at 5-10 minute intervals depending on the mode of each radar. The individual NEXRAD site graphics seen here were created by NCAR-RAP software engineer Paddy McCarthy. The national mosaic product was created by Unidata's Steve Chiswell.
   Much more detailed information about how a weather radar works and how to interpret images created from radar data can be found on a NWS tutorial page.
   The Research Applications Program of NCAR maintains a short archive of these images via the interface on the radar page. As with all data/images on this series of web pages, please read the disclaimer regarding data availability.
   Note: The link to images of lightning strike data is accessible by .ucar.edu addresses only because these data are proprietary and UCAR may not redistribute data or graphics to external users.
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