MIAMI -- Tropical Storm Rina continues a northerly trek away from the U.S. as it continues to strengthen.

The latest advisory from the National Hurricane Center shows the storm still in the middle of the Atlantic but traveling to the north at 18 miles per hour but could shift to the northeast late Wednesday.

The storm's sustained winds have already increased to 50 mph with stronger gusts. It's expected to continue getting stronger into the night and become a post-tropical cyclone Wednesday night or early Thursday. Rina should begin to weaken on Thursday.

Tropical storm-force winds extend outward up to 160 miles to the east of the center. Previously situated 800 miles to the east of Bermuda, the Associated Press reported that Rina posed no threat to land at the time.