Denver Weather Examiner: Is global warming responsible for a slow tornado season?

Stormchasers across Tornado Alley have been frustrated this spring by what seems to be a lack of tornadoes and severe weather. Indeed, VORTEX2, the largest tornado field study ever, has been running for more than two weeks now and has not seen one twister. Last week, Weather Channel Senior Meteorologist Stu Ostro speculated that global warming was the cause.

Feb '08: Sen. Kerry Blames Tornadoes on Global Warming

Former Democratic presidential nominee blames 'intense storms' that have killed more than 50 on climate change.