After an extended nap, the main hurricane region of the Atlantic Ocean appears to be waking up, with forecasters now watching two potential storms. The National Hurricane Center also is watching Tropical Storm Mario and another potential storm in the Pacific Ocean.
A tropical storm is expected to form in the Central Atlantic over the next day or so several hundred miles east of the Windward Islands, the National Hurricane Center said on Sept. 16, but it's too soon to say what impact the storm could have on the U.S. mainland.
Forecasters will get a better idea of the storm's eventual path once the system develops into an organized tropical depression or storm, which is likely to happen over the next 48 hours, the hurricane center said. If a storm forms, it would be the seventh of the 2025 hurricane season and would draw the name Gabrielle, according to the 2025 list of storm names.
In the Pacific Ocean, Tropical Storm Mario has begun to encounter cooler waters and is expected to weaken to a tropical depression by the evening of Sept. 16, the hurricane center said. Moisture from the devolving storm is likely to be picked up by another system, then interact with the high temperatures to bring rain to the San Diego region, especially the mountains. That rain could start as early as the afternoon of Sept. 16 and continue into the weekend, said the National Weather Service office in San Diego.
