(CNN) — Hurricane Danielle remained a powerful Category 4 storm Friday morning, the National Hurricane Center reported.

On Friday morning, Danielle was about 480 miles southeast of Bermuda.

Travelling about 1,300 miles behind Danielle, also far from land,

Tropical Storm Earl’s winds swirled near 45 mph Friday morning, with higher gusts. The hurricane center forecast that Earl, which was moving toward the west, could become a hurricane by Sunday.

If so, Earl would be the third hurricane of the 2010 Atlantic season, following Danielle and Hurricane Alex.

There were no coastal watches or warnings in effect for Earl, but residents in the northern Leeward Islands were urged to monitor the storm’s progress.

Earl is expected to follow a path similar to Danielle’s, although likely further south and west, which could mean more of an impact on Bermuda. It is still too early to rule out a possible landfall in the United States or the Caribbean, CNN meteorologist Brandon Miller said Thursday.

Alex was a Category 2 system that caused widespread damage and some deaths in northern Mexico after it made landfall on June 30 near the border between Mexico and Texas, according to the Mexican government news agency.