(CNN) - Not yet a hurricane, Tropical Storm Isaac has already delivered shock waves from the Caribbean to Florida, postponing terror trial hearings in Cuba and posing a potential threat to next week's GOP convention in Tampa.
Isaac's path remains uncertain, but some computer models show the storm slicing its way up Florida's peninsula. Others send it farther west, into the Gulf of Mexico.
Officials are taking the threat seriously.
This morning on "Early Start," meteorologist Rob Marciano details the latest track for the storm.