Why do I keep seeing those first whisps as sub-prime mortgages? Anyway, enjoy:
See web-only content:
http://www.theatlantic.com/daily-dish/archive/2008/11/how-tornados-are-born/208134/
This article available online at:
http://www.theatlantic.com/daily-dish/archive/2008/11/how-tornados-are-born/208134/
