National Weather Service Doppler Radar (Velocity - Storm Relative Motion) taken at 11:35 AM MDT (1735 UTC) 28 May, 2008 showing tornado-producing supercell thunderstorm near Windsor, Colorado.
NWS Colorado/Boulder
<a rel="nofollow" class="external text" href="http://www.crh.noaa.gov/bou/?n=tor_radar_052208">NWS Colorado/Boulder</a>