Tropical Storm Leslie is predicted to strengthen into a hurricane by the weekend, and is currently heading towards the U.S.

Leslie had winds of 40 miles per hour as it became a tropical storm in the Atlantic late Wednesday. Forecasters expect it to become a hurricane in a couple of days as it slowly moves northwest, the National Hurricane Center said in its latest advisory.

MIAMI (AP) — Leslie has strengthened into a hurricane in the Atlantic Ocean and isn’t threatening land, forecasters said. The storm was located Saturday about 725 miles (1,170 kilometers) west-southwest of the southernmost Cabo Verde Islands and had maximum sustained winds of 75 mph (120 kph). There were no coastal watches or warnings in effect.