Tropical Storm Hernan forms in the Pacific while a different weather system could soak Hawaii

Tropical Storm Hernan emerged in the Pacific Ocean on Thursday, August 13, 2026, but posed no threat to land, said forecasters. Located approximately 1,460 miles west of the southern tip of Mexico's Baja California peninsula, the storm boasted maximum sustained winds of around 40 mph and was moving westward. At the same time, another weather system, Potential Tropical Cyclone One-C, was poised to affect Hawaii.

Positioned about 775 miles east-southeast of the islands, this system was forecast to unleash heavy rain, strong winds, and hazardous surf beginning late Friday. With winds around 40 mph, it remained just short of becoming a full-fledged tropical storm. Should it make landfall on Hawaii's southern coast as a tropical storm on Saturday, the system could deposit 5 to 10 inches of rainfall, with a maximum of 20 inches, potentially leading to flooding and mudslides.

Meanwhile, in the Atlantic Ocean, Tropical Storm Cristobal had weakened into a tropical depression and was expected to dissipate by Thursday. Situated around 610 miles west of the Azores, this storm posed no threat to land.