Tropical Storm Sara formed this afternoon and threatens to bring "life-threatening and potentially catastrophic flash flooding and mudslides" to Honduras throughout the weekend, according to the latest update from the National Hurricane Center. A turn toward Florida is still possible, forecasters said.

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.

Tropical Storm Sara has formed in the Caribbean Sea and has begun lashing the sparsely-populated Caribbean coast of Honduras with heavy rain.