Tropical Storm Melissa weakened into a depression Sunday, while the remnants of Tropical Storm Karen limped along in the eastern Atlantic, forecasters said, according to AP. At 11 a.m. EDT (1500 GMT), Melissa was centered about 570 miles (917 kilometers) west of the Cape Verde Islands and posed no immediate threat to land, according to the National Hurricane Center. The system was moving west-northwest near 13 mph (21 kph) and maximum sustained winds had decreased to 30 mph (48 kph) _ down from 45 mph (72 kph) on Saturday. Karen faded into an area of disturbed weather Sunday and the hurricane center was no longer issuing advisories for the system. In the eastern Pacific, Tropical Storm Juliette was about 335 miles (539 kilometers) off the coast of Mexico and posed no threat to land. Forecasters expect this year's Atlantic hurricane season to be busier than average. Last month, they said as many as 16 tropical storms were likely to form, with nine strengthening into hurricanes. The season runs from June 1 to Nov. 30.