GoWally.com Live Doppler Radars
Links to television station radars and other radar systems throughout the U.S.
http://www.gowally.com/wx/radar.html

National Weather Service Doppler Radars
The latest Doppler radar images in the United States from the National Weather Service, including national composites and one hour radar loops.
http://weather.noaa.gov/radar/national.html

IPS MeteoStar Radar
National and local radar images and loops for the United States. Includes Base Reflectivity, Vertical Integrated Liquid and Storm Total Rainfall images.
http://wxweb.meteostar.com/radar/radar_link.shtml?map=SYS_BASE_REFL.gif

C2K's WeatherPage
Images of current weather, severe weather, radar, and satellite, viewed through WxViewer.
http://users.ameritech.net/c2ks2day/index.htm