PBS NewsHour

Timing of strong storms in the Midwest is 'very unusual'

Clip: 11/18/2013 | 4m 26s

The string of storms that devastated the Midwest over the weekend was very rare for the timing, both time of year and time of day. Gwen Ifill talks to Howard Bluestein of the University of Oklahoma about the special conditions that triggered the deadly tornadoes.

Aired: 11/18/13

Rating: NR

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