Currently, Oscar is located more than 1,800 miles east of Jacksonville and is moving toward the west-northwest near 12 mph.
Tropical Storm Oscar continues to swirl in the Atlantic, but does not pose a threat to land. A gradual weakening trend is forecast to begin tonight.
Under the heading Hazards Affecting Land, the hurricane center said: "None".
Oscar is the 15th named storm of the 2018 Atlantic Hurricane Season.
At this time, there is still only one area of interest in the Atlantic Basin.
The Atlantic hurricane season typically peaks in September and October, but major storms do sometimes form in November.
The National Hurricane Center's 8 a.m. Friday advisory said the system has changed little in organization since Thursday night. By Tuesday, the storm is expected to be speeding north-northeast over open waters. The hurricane is forecast to accelerate toward the north-northeast or northeast during the next couple of days.
Subtropical storms have less defined and cooler centres than tropical storms.