9.20.11 100 of One / 1000 of Another

Return Period (Wikipedia)

“An incredible 7.03” of rain fell in 3 hours on Sept. 8 to the south of D.C. in Ft. Belvoir, Va. According to the National Weather Service in Baltimore/Washington, this has a less than 0.1% chance of happening in a given year, making it a 1000-year rain event.”

Really? Is that all it takes to garner a 1000-year rain event. Seems like these monikers are becoming quite meaningless: Atlanta 2009.

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