Tropical Storm Ernesto heads toward Jamaica

This NOAA satellite image taken Saturday, Aug. 4, 2012 at 01:45 AM EDT shows Tropical Storm Ernesto over the southeastern Caribbean Sea. In addition, showers and thunderstorms are noted from central Cuba northward over the central and northwestern Bahamas. (AP Photo/Weather Underground)Tropical Storm Ernesto blew across open waters Saturday on a projected path that would skirt Jamaica and hit Mexico after dumping heavy rain on islands in the eastern Caribbean.