Hurricane Irma has the potential of threatening South Florida next week, but the forecast wasn't clear yet Thursday night.
The powerful storm continued to intensify and follow the strengthening track of Hugo, Floyd and Ivan -- some of the largest and most intense hurricanes forming near the Cape Verde Islands.
A strong high-pressure ridge over the Atlantic is likely to continue steering the hurricane westward, and then west southwestward through the weekend.
A ridge of high pressure over the Atlantic could weaken and allow Irma to stay out at sea. But if the ridge strengthens, the force will put Irma on a track that could pose a threat to South Florida residents next week.