"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.

Cubans in the eastern provinces of Holguín and Guantánamo braced for a direct hit by Hurricane Oscar on Sunday afternoon. As the Category 1 hurricane made landfall near Baracoa, a coastal in city in Guantánamo province, around 5:50 p.m., most of the country still had no power.