— Tropical Storm Bonnie, which formed Monday afternoon over the Gulf of Mexico, is forecast to head north toward the U.S. Gulf Coast. The storm is expected to hit the Gulf Coast from somewhere near the mouth of the Mississippi River east to northern Florida on Thursday as a minimal hurricane with top winds near 75 mph.

At 5 a.m. ET Tuesday, Bonnie‘s center was about 390 miles south of the mouth of the Mississippi River and moving toward the west-northwest at 8 mph, the National Hurricane Center says. Its strongest winds were around 50 mph. (Related: Bonnie‘s latest maps, advisories)

Tropical Storm Charley formed Tuesday morning out of Tropical Depression Three that first developed on Monday.

At 5 a.m. ET, Charley‘s highest sustained winds were 40 mph, and its center was about 450 miles south-southeast of Santo Domingo in the Dominican Republic.