Potential Tropical Cyclone Seven caused the National Hurricane Center to issue a Tropical Storm Watch for a portion of the U.S. Gulf Coast on Sunday afternoon. A Tropical Storm Watch was in effect for the portion of the coast from the Alabama-Florida border to Morgan City, Louisiana including Lake Pontchartrain. At 5:00 p.m. EDT on Sunday the center of Potential Tropical Cyclone Seven was located at latitude 22.7°N and longitude 77.3°W which put it about 275 miles (445 km) east-southeast of Marathon, Florida. It was moving toward the west-northwest at 15 m.p.h (24 km/h). The maximum sustained wind speed was 30 m.p.h. (50 km/h) and there were wind gusts to 40 m.p.h. (65 km/h). The minimum surface pressure was 1012 mb.
Bands of showers and thunderstorms began to form in a tropical wave over the Bahamas and the National Hurricane Center designated the system as Potential Tropical Cyclone Seven in order to be able to issue the Tropical Storm Watch for the north coast of the Gulf of Mexico. The circulation of Potential Tropical Cyclone Seven was still organizing. A distinct low level center of circulation had not formed. Bands of showers and thunderstorms were developing and the bands were starting to revolve around the inner part of the weather system. Thunderstorms were beginning to generate some upper level divergence.
Potential Tropical Cyclone Seven will be moving into an environment favorable for intensification. It will move over water where the Sea Surface Temperature is near 30°C. An upper level ridge is forecast to develop over Potential Tropical Cyclone Seven. If that occurs, then the upper level winds would be weak and there would be little vertical wind shear. Potential Tropical Cyclone Seven is forecast to intensify into Tropical Storm Gordon. If the system moves slowly enough, there is a chance it could strengthen into a hurricane before it reaches the Gulf Coast.
Potential Tropical Cyclone Seven will move around the western end of a subtropical high pressure system over the western Atlantic Ocean. The high will steer Potential Tropical Cyclone Seven in a general west-northwesterly direction. On its anticipated track the system will move over the Florida Keys on Monday. It will be over the eastern Gulf of Mexico on Tuesday and the system could reach the northern Gulf Coast late on Tuesday or early on Wednesday.
Elsewhere over the tropical Atlantic, Tropical Storm Florence was moving quickly away from the Cabo Verde Islands. At 5:00 p.m. EDT on Sunday the center of Tropical Storm Florence was located at latitude 17.4°N and longitude 34.6°W which put it about 700 miles (1125 km) west of the Cabo Verde Islands. Florence was moving toward the west-northwest at 15 m.p.h. (24 km/h). The maximum sustained wind speed was 50 m.p.h. (80 km/h) and there were wind gusts to 65 m.p.h. (105 km/h). The minimum surface pressure was 1000 mb.