The Most-observed tornado ever

The Goshen County, Wyoming, tornado of June 5, 2009, set a new standard in tornado documentation. Researchers trained their flotilla of mobile radars, sounders, cameras, and other equipment on the emerging storm as part of the NCAR-organized in VORTEX2 (Verification of the Origins of Rotation in Tornadoes Experiment 2). Detailed VORTEX2 data collection began 20 minutes before the tornado formed and continued throughout the life cycle of the tornado. The resulting data should promote understanding of how tornadoes form and why some storms do not develop into twisters. In 2010, more than 100 researchers again took to the plains to hunt these killer storms.