A lot of potentially dangerous tornadoes are expected to sweep across a big part of the country in much of the southern plains and lower Mississippi River Valley. Tornadoes are likely to pop up in Arkansas, eastern Texas, eastern Oklahoma, Missouri, western Tennessee, Louisiana, Mississippi and Alabama.
Storm chasers are already in place to track the storms. You can watch them live here http://www.tornadoalleylive.com/subindex/weather/maps
You can also download storm shield, a live saving app similar to a NOAA Emergency Weather Radio for the iPhone and Android: http://bit.ly/Q0RgWq
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The prediction by the National Oceanic and Atmospheric Administration is more than what's considered an average Atlantic season.