National Weather Service Doppler Radar

One of the most important instruments meteorologists use in tracking a storm, Doppler radar is used to identify the location, direction, and speed of precipitation. This NWS Doppler base reflectivity mosaic compiled by NOAA nowCOAST covers the U.S. and Guam with one kilometer (0.6 mile) resolution using the NWS Multi-Radar/Multi-Sensor (MRMS) system.

time period: current; updates every 4-10 minutes.