Tropical Storm Sara formed in the western Caribbean Sea Thursday afternoon as it headed toward Honduras, but there is a great deal of uncertainty about what, if any, impacts the storm will have in Florida or other parts of the U.

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.

A shift in Tropical Depression 19's track has significantly impacted meteorologists' predictions about its potential to form into Hurricane Sara.