This area of a tropical cyclone has slightly weaker winds than its counterpart on the other side of the storm’s center, but it’s still a dangerous part of the storm.

Tropical cyclones require sea-surface temperatures above 27°C. This provides warm, moist air that generates a massive amount of energy and fuels the cyclone.

The National Hurricane Center issued its first advisory on the fifth-named storm of the Atlantic hurricane season at 11 a.m., warning Erin could become a hurricane by Wednesday, Aug. 13 and a major ...

Dexter becomes a post-tropical cyclone. Tropical-storm-force winds extend outward up to 185 miles from the center. The National Hurricane Center issued its last advisory on Dexter at 11 a.m. Aug. 7.

Tropical Storm Keli had maximum sustained winds of 40 mph (65 kph). It was about 1,030 miles (1,658 kilometers) southeast of Honolulu and was moving west at about 12 mph (19 kph).

Tropical Storm Keli had maximum sustained winds of 40 mph (65 kph). It was about 1,090 miles (1,755 kilometers) southeast of Honolulu and was moving west at about 10 mph.