Tropical Depression Nine became Tropical Storm Issac Saturday as it continues to lazily move west towards the Caribbean.
Issac could reach hurricane strength by Monday.
The U.S. East Coast continues to warily watch Tropical Storm Florence, which forecasters warn could rapidly intensify back into a major hurricane (category 3 or higher) by Monday.
Tropical Storm Helene kept a brisk westward pace Saturday afternoon. Helene could be a hurricane by Sunday. Long-range models suggest the system may stay over the open Atlantic.
For now, these three storms do not pose a threat to the Gulf Coast.
Photos: NOAA, NOAA/STAR, National Hurricane Center