Mild season in Tornado Alley frustrates scientists

Thursday, July 30, 2009 | 4:00 p.m. CDT

DES MOINES, Iowa — This has been an unusually mild year in Tornado Alley, which is good news, of course, for the people who live here, but a little frustrating to scientists who planned to chase twisters as part of a $10 million research project.