Major twister hits Oklahoma
Its speed, which largely determines the damage it causes, is still unknown
By Janet Raloff, 17:22 PM May 21, 2013
A major tornado touched down around 2:55 p.m. in an Oklahoma City suburb on May 20. At the time, the National Weather Service tweeted: “TORNADO! On the north side of Newcastle moving east.” Over the next 40 minutes, this twister cut a devastating path through several communities.
Tornadoes are Mother Nature’s most violent storms. Although relatively short-lived, their winds can pack far more power than a hurricane’s.
On May 21, the weather service reported the previous day’s tornado had cut...
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