Twister terror coming earlier in Tornado Alley
22 Sep 2014

By TIM RADFORD.- The terrifying whirlwinds that punctuate the mid-Western summer in the United States so frequently as to earn the nickname Tornado Alley for the southern plains region states such as Nebraska, Kansas, Oklahoma and northern Texas, are forming up to two weeks earlier than they did 60 years ago.
John Long and Paul Stoy, research scientists at Montana State University, report in the journal Geophysical Research Letters that, on average, the tornado season advanced by one week between 1954 and 2009.
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