With the heavy precipitation event earlier this week, it is a good time to check in on the frequency of such events. The featured chart presents a stacked histogram of the frequency of daily precipitation totals partitioned by week of the year for Ames. All weeks are normalized, so the frequencies are relative to the number of events for that week. Of interest are the weekly frequencies of greater than two inches of precipitation. The frequencies are rather consistent from mid May through August at about 3%, so roughly one out of every thirty three precipitation events are above two inches.

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