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Volume 27, Issue 3

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December 2, 2013

Wimpy hurricane season a surprise — and a puzzle

By Brian McNoldy

It was a hurricane season almost without hurricanes. There were just two, Humberto and Ingrid, and both were relatively wimpy, Category 1 storms. That made the 2013 Atlantic hurricane season, which ended Saturday, the least active in more than 30 years — for reasons that remain puzzling.

The season, from June through November, has an average of 12 tropical storms, of which six to seven grow to hurricane strength with sustained winds of 74 mph or greater. Typically, two storms become “major” hurricanes, Category 3 or stronger, with sustained winds of at least 111 mph.

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http://www.washingtonpost.com/national/health-science/wimpy-hurricane-season-a-surprise--and-a-puzzle/2013/12/01/a3267f1c-57a9-11e3-835d-e7173847c7cc_story.html