Posted Wednesday, November 9, 2011 --- 6:25 a.m.

MIAMI (AP) -- Tropical Storm Sean has strengthened slightly and eventually could bring dangerous surf and rip currents to Bermuda and the U.S.

The U.S. National Hurricane Center in Miami said Wednesday that Sean's maximum sustained winds are 50 mph (85 kph). It is located about 450 miles (730 km) southwest of Bermuda and is moving west at 3 mph (6 kph). The storm is expected to make a gradual turn toward the north, followed by a turn to the northeast and an increase in speed. Swells generated by Sean are expected to affect parts of the southeastern coast of the U.S. and Bermuda during the next few days.

A tropical storm warning is in effect for Bermuda.

The Atlantic hurricane season lasts from June to the end of November.

Copyright 2011. The Associated Press.