Early on August 11, we had rates of up to 2–3 inches an hour reported in the most deluged areas. Totals exceeded nearly 2 feet in some areas as a result of the system remaining stationary. Accumulations peaked at 31.39 inches in Baton Rouge, Watson and Denham Springs.
The Washington Post reported that the "no-name storm" dumped three times as much rain on Louisiana as Hurricane Katrina. It dropped the equivalent of 7.1 trillion gallons of water or enough to fill Lake Pontchartrain about four times. Hurricane Katrina, by comparison, dumped about 2.3 trillion gallons of rainwater in the state (though more in other states). The flood also dumped more water than Hurricane Isaac. Pretty safe bet we will never forget this - ever.