"Some additional weakening is likely while Oscar moves across the mountainous terrain of eastern Cuba, but Oscar is forecast to be a tropical storm when it moves north of Cuba late today and then moves near the southeastern and central Bahamas on Tuesday," the hurricane center said Monday morning.

Oscar, which the National Hurricane Center characterized as "very small," is the 15th named storm of the hurricane season.

Hurricane Oscar is forecast to make landfall along the northeastern coast of Cuba Sunday afternoon or evening, according to the National Hurricane Center.