How do Oklahoma's May tornado numbers compare to other years?

While there have been several alert days and severe weather threats this month, we have seen a quiet start to May for ...
The Daily Beast

Moore, Oklahoma, May Be the Tornado Capital of America

Is Moore, Oklahoma, the unluckiest town in America? The suburb of Oklahoma City (population 55,000) was hit Monday with its fifth massive tornado in just 15 years. Early images of Moore on Monday ...