Tropical Storm Isaac (09L) Near Florida – August 27th, 201228.3N 84.8W
The National Hurricane Center began tracking a tropical wave off the coast of Africa on August 17.
It started to become more concentrated on August 18, with further organization beginning later that day as it headed into favorable environmental conditions for development.
The circulation continued to intensify in the next couple of days. After acquiring more deep convection, the National Hurricane Center classified the wave as a tropical depression on August 21 at 5:00 a.m. AST (0900 UTC). It was upgraded to Tropical Storm Isaac at 5:00 p.m. AST (2100 UTC) August 21.
As of 4 p.m. CDT (2100 UTC) August 27, Tropical Storm Isaac (09L) is located within 15 nautical miles of 26.1°N 85.9°W, about 255 mi (410 km) south-southwest of Apalachicola, Florida and about 280 mi (450 km) southeast of the mouth of the Mississippi River.
Maximum sustained winds are 55 knots (65 mph, 100 km/h), with stronger gusts. Minimum central pressure is 984 mbar (hPa; 29.06 InHg), and the system is moving northwest at 12 kt (14 mph, 22 km/h). Tropical storm force winds extend outward up to 205 miles (335 km) from the center of Isaac.