A supercell thunderstorm that crossed eastern Colorado on the evening of 6 June 1990 produced several tornadoes, one of which devastated the town of Limon. This image shows the tornado in Limon at 2011 Mountain Daylight Time. An earlier tornado from the same storm helped trigger warnings that gave Limon residents adequate time to seek shelter. Often visible as a funnel-shaped cloud, tornadoes can develop with little or no warning. Doppler radar and other advanced technology now give advance warning of many tornadoes. (Full sequence: DI00523-DI00553)
