A National Oceanic and Atmospheric Administration satellite image taken on Tuesday, Aug. 28, 2012, at 1:45 a.m. EDT shows a swirl of clouds in the Gulf of Mexico associated with Tropical Storm Isaac as it moves slowly toward the central Gulf Coast. Landfall is expected later Tuesday or early Wednesday in Louisiana. (AP Photo/Weather Underground)
Tropical Storm Isaac, in the lower right corner, moves over the Lesser Antilles in a satellite image from the National Oceanic and Atmospheric Administration taken on Wednesday, Aug. 22, 2012, at 1:45 p.m. EDT. (AP Photo/Weather Underground)
Tropical Storm Isaac, in the lower right corner, moves over the Lesser Antilles in a satellite image from the National Oceanic and Atmospheric Administration taken on Wednesday, Aug. 22, 2012, at 1:45 p.m. EDT. (AP Photo/Weather Underground)
Tropical Storm Isaac, seen here Wednesday in a satellite image, is creating a cyclone of overblown news coverage as it relates to its possible impact on the Republican National Convention, which opens Monday in Tampa, Fla. (National Oceanic and Atmospheric Administration)
Tropical Storm Isaac, seen here Wednesday in a satellite image, is creating a cyclone of overblown news coverage as it relates to its possible impact on the Republican National Convention, which opens Monday in Tampa, Fla. (National Oceanic and Atmospheric Administration)
This NOAA satellite image taken Tuesday, Aug. 7, 2012, at 1:45 a,m, EDT shows a swirl of clouds in the western Caribbean Sea associated with Tropical Storm Ernesto as it approaches the Yucatan Peninsula. Ernesto is expected to strengthen into a hurricane being landfall just north of Belize late Tuesday evening. (AP PHOTO/WEATHER UNDERGROUND)
This NOAA satellite image taken Tuesday, Aug. 7, 2012, at 1:45 a,m, EDT shows a swirl of clouds in the western Caribbean Sea associated with Tropical Storm Ernesto as it approaches the Yucatan Peninsula. Ernesto is expected to strengthen into a hurricane being landfall just north of Belize late Tuesday evening. (AP PHOTO/WEATHER UNDERGROUND)
This NOAA satellite image, taken Aug. 6, 2012 at 1:45 a.m. EDT, shows cloud cover ahead of a cold front that extends from the Lower Great Lakes to the Lower Mississippi Valley. (Associated Press/Weather Underground)
This NOAA satellite image, taken Aug. 6, 2012 at 1:45 a.m. EDT, shows cloud cover ahead of a cold front that extends from the Lower Great Lakes to the Lower Mississippi Valley. (Associated Press/Weather Underground)
