Later on August 25 , Isaac emerged into the southwestern Atlantic Ocean over the Bahama Banks . Initially , the storm posed a threat to Florida and the 2012 Republican National Convention , but passed to the southwest late on August 26 . However , its outer bands spawned tornadoes and dropped isolated areas of heavy rainfall , causing severe local flooding , especially in Palm Beach County . Neighborhoods in The Acreage , Loxahatchee , Royal Palm Beach , and Wellington were left stranded for up to several days . Tornadoes in the state destroyed 1 structure and caused damage to at least 102 others . Isaac reached the Gulf of Mexico and began a strengthening trend , reaching Category 1 hurricane status on August 28 . At 0000 UTC on the following day , the storm made landfall near the mouth of the Mississippi River in Louisiana with winds of 80 mph ( 130 km/h ) . Three hours later , a dropsonde reported a barometric pressure of 965 mbar ( 28.5 inHg ) . Isaac briefly moved offshore , but made another landfall near Port Fourchon with winds of 80 mph ( 130 km/h ) at 0800 UTC on August 29 . A combination of storm surge , strong winds , and heavy rainfall left 901,000 homes without electricity , caused damage to 59,000 houses , and resulted in losses to about 90 % of sugarcane crops . Thousands of people required rescuing from their homes and vehicles due to flooding . The New Orleans area was relatively unscathed , due to levees built after hurricanes Katrina and Rita in 2005 . Isaac slowly weakened while moving inland , and dissipated over Missouri on September 1 . The remnants of Isaac continued generally eastward over southern Illinois before moving southward over Kentucky . On September 3 , the mid-level circulation of the storm split into two parts , with one portion continuing southward into the Gulf of Mexico and the other eastward over Ohio . The remnants brought rainfall to some areas impacted by an ongoing drought . Throughout the United States , damage reached about $ 2.35 billion and there were 9 fatalities , most of which was incurred within the state of Louisiana . Isaac was the most recent name to have over $ 1 billion dollars and having its name avoiding retirement
2012 Republican National Convention
2012 Republican National Convention
2012 Atlantic hurricane season