The featured chart displays the average number of calendar days each month during which at least one automated thunder report was reported at the Des Moines Airport. Based on the averages, the month of June represents peak thunder for the year. So far, this year's total is a bit below average but a number of forecasted stormy days remain. Of course, there are caveats with a plot like this as automated reporting methods have changed over the years. So a value of eight days in June represents about one out of every four days.

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Tags:   thunder