The tornado outbreak of yesterday may go down in the record books as the largest in US history. The featured chart displays, at five minute intervals, the total number of active tornado warnings and areal coverage of these warnings expressed in square kilometers. Since 3 PM on Tuesday, there has been at least one active tornado warning making for a streak of 39 straight hours (at the time of this writing). At its peak yesterday evening, the areal coverage of would have been large enough to cover roughly one third of Iowa. I'll update this chart once the streak ends and post the final duration number.

Update The streak ended at 8:45 AM CDT

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Tags:   tornado   outbreak