Almost three months after the start of hurricane season, systems are churning in the tropics, including Tropical Storm Fernand, which formed Aug. 23 south-southeast of Bermuda.

Tropical Storms Juliette and Fernand are churning over open waters, one in the Pacific and one in the Atlantic, the Miami-based U.S. National Hurricane Center said.

"About 80% of all major hurricanes in the Atlantic can trace their roots to a tropical wave."