High Quality Content by WIKIPEDIA articles! The 2012 Hurricane Isaac tornado outbreak was a tropical cyclone-produced severe-weather event that affected the U.S. states of Florida, Mississippi, Alabama, Louisiana, Missouri, and Illinois from August 27 to September 4, 2012. Hurricane Isaac produced a total of 34 tornadoes, with the strongest being two EF2s in Mississippi and Arkansas. 19 tornado watches were issued for Isaac over eight days. 171 tornado warnings covered 12 states, with Mississippi being issued the most at 77.