Sara was forecast to drop 10 to 20 inches of rain, with up to 30 inches in isolated areas in northern Honduras. In a 7 a.m. Eastern update, the hurricane center said "heavy rain, life-threatening flash flooding and mudslides" were possible through the weekend in Central America.

Tropical Storm Sara formed Thursday in the Caribbean, and is poised to deliver "potentially catastrophic" rainfall in Honduras in particular. It's not yet clear if it will threaten the Gulf Coast, though it's possible.

Now, all eyes are on Tropical Storm Sara, as it meanders over the western Caribbean Sea through the weekend. From there, its future is very uncertain. Topography over Central America and Mexico will work to tear the storm apart.