Tropical Storm Erin weakens in Atlantic

A satellite image of Tropical Storm Erin taken at 11:23 a.m. EDT Sunday

MIAMI, Florida (CNN) -- The fifth named storm of the Atlantic hurricane season, Tropical Storm Erin, weakened Monday and posed no immediate threat to land.

At 5 p.m. EDT, the storm's maximum sustained winds were near 45 mph (75 km/h), down from 60 mph (96 km/h) earlier in the day. Erin was about 875 miles (1,410 km) east of the Leeward Islands in the Atlantic Ocean, according to the National Hurricane Center.

The storm was moving toward the west-northwest at about 18 mph (30 km/h), and the weather center predicted that motion would continue for the next 24 hours. The storm could strengthen again over the next day or two, the center said.

Tropical storm force winds extended up to 115 (185 km) miles from Erin's center.