Melissa is forecast to become a hurricane by Saturday, Oct. 25, and a major hurricane by Sunday, Oct. 26, the Hurricane Center said. Current forecasts predict Melissa will be a Category 4 storm early next week. A major hurricane is one that is a Category 3 or higher, with maximum sustained winds of at least 111 mph.

Tropical Storm Sonia is churning in the Pacific Ocean and isn’t threatening land. The U.S. National Hurricane Center says the storm formed over the weekend and on Monday was about 965 miles southwest of the southern tip of Mexico’s Baja California peninsula.

Hurricane Melissa strengthened into a major Category 4 hurricane, with the possibility of intensifying to a Category 5 storm Sunday night, unleashing torrential rain and threatening to cause catastrophic flooding in the northern Caribbean,