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This image obtained from the National Oceanic and Atmospheric Administration (NOAA) shows Tropical Storm Karen in the Gulf of Mexico on October 5, 2013. Karen, swirling offshore in the Gulf of Mexico, was on track to make landfall late Saturday in the US state of Louisiana, forecasters said. While weakening overnight, the storm is still expected to bring rain and some coastal flooding as it moves toward Mississippi and Alabama, according to the National Hurricane Center. At 1800 GMT, Karen was located about 130 miles (205 kilometers) south-southwest of Morgan City, Louisiana, packing maximum sustained winds of 40 miles per hour. Hurricane watches were canceled overnight, but a tropical storm warning was in effect for an area that included Morgan City, located about 70 miles west of New Orleans. AFP PHOTO/NOAA-/AFP/Getty Images ( 523539797 )

Red flags warn swimmers to stay out of the Gulf of Mexico as a squall from Tropical Storm Karen moves offshore at Gulf Shores, Ala., on Saturday, Oct. 5, 2013. The beaches remained open, but authorities said dangerous underwater rip currents made the waters too dangerous to enter. (AP Photo/Jay Reeves) ( Tropical Weather )

Lillian Edwards, left, Zanaya Reddick, and Christine Encalade, right, all of Pointe a la Hache, La., sit at an evacuation shelter, in anticipation of Tropical Storm Karen, Saturday, Oct. 5, 2013. The East Bank of Plaquemines Parish has been under a mandatory evacuation, which has been downgraded to a voluntary evacuation. (AP Photo/Gerald Herbert) ( Tropical Weather )

Rhonda Etienne of Davant,La., holds her niece Nevaeh Etienne, three months, in an evacuation shelter in Belle Chasse, La., in anticipation of Tropical Storm Karen, Saturday, Oct. 5, 2013. The East Bank of Plaquemines Parish has been under a mandatory evacuation, which has been downgraded to a voluntary evacuation. (AP Photo/Gerald Herbert) ( Tropical Weather )

Davina Bartholemew rests in a cot at an evacuation shelter in Belle Chasse, La., in anticipation of Tropical Storm Karen, Saturday, Oct. 5, 2013. The East Bank of Plaquemines Parish has been under a mandatory evacuation, which has been downgraded to a voluntary evacuation. (AP Photo/Gerald Herbert) ( Tropical Weather )

Rhonda Etienne of Davant,La., holds her niece Nevaeh Etienne, three months, in an evacuation shelter in Belle Chasse, La., in anticipation of Tropical Storm Karen, Saturday, Oct. 5, 2013. The East Bank of Plaquemines Parish has been under a mandatory evacuation, which has been downgraded to a voluntary evacuation. (AP Photo/Gerald Herbert) ( Tropical Weather )

Tylon Harvey, 10, form Phoenix, La., sips a drink inside an evacuation shelter in Belle Chasse, La., in anticipation of Tropical Storm Karen, Saturday, Oct. 5, 2013. The East Bank of Plaquemines Parish has been under a mandatory evacuation, which has been downgraded to a voluntary evacuation. (AP Photo/Gerald Herbert) ( Tropical Weather )

Gregory Ragas, of Davant, La., holds his daughter Jasmine Ragas, 1 year, at an evacuation shelter in Belle Chasse, La., in anticipation of Tropical Storm Karen, Saturday, Oct. 5, 2013. The East Bank of Plaquemines Parish has been under a mandatory evacuation, which has been downgraded to a voluntary evacuation. in Belle Chasse, La., Saturday, Oct. 5, 2013. (AP Photo/Gerald Herbert) ( Tropical Weather )

This image provided by the Naval Research Laboratory shows a infrared satellite image taken at 7:40 p.m. EDT Friday Oct. 4, 2013 of Tropical Storm Karen. Karen continued losing strength Saturday as it headed toward the central Gulf Coast, but forecasters were still expecting it to bring significant rain and potential flooding to low-lying areas. The National Hurricane Center reported at 2 a.m. Saturday that Karen's maximum sustained winds had dropped to 40 mph, making it a weak tropical storm. The storm was moving west-northwest at 10 mph to 15 mph. Forecasters say there is a slight chance of strengthening before making landfall. (AP Photo/Naval Research Laboratory) ( Tropical Weather )

This NOAA satellite image taken Saturday, October 5, 2013 at 1:45 PM EDT shows clouds extending across the northern portions of the region due to a stationary frontal boundary with some rain and thunderstorms. Clouds also dominate the Ohio Valley into the Middle and Lower Mississippi Valleys as a front moves eastward with some rain and thunderstorms. Tropical Storm Karen is located in the north central portions of the Gulf of Mexico. (AP Photo/Weather Underground) ( NOAA CLOUDS )