Radarmatic provides a JSON data feed representing measured precipitation from 200 weather radar stations, both within and outside the continental United States. Radar data come from the U.S. National Oceanic and Atmospheric Administration (NOAA), which aggregates and provides the data either in real time or with only short delays. The service caches the NOAA feeds and generates JSON output.
API methods support requests specifying a radar reporting station to retrieve data representing its most recent report of precipitation. Only one station may be specified at a time currently. The JSON output allows creation of images in the browser to recreate conditions detected by the reporting station. Requests can also retrieve data for radar readings previous to the current one.