But landfall wouldn't be until next Wednesday, so there's still considerable uncertainty about the projection. Tropical storm Isaac could affect Tampa before then, but that's still uncertain, too.
Tropical storm Isaac is gaining strength, but isn't organized enough to become a hurricane before Monday. Isaac will hit Haiti and the Dominican Republic today, and Cuba on Friday.
Though the media has focused on possible effects of the storm on the Republican National Convention planned to take place in Tampa beginning on Monday, others worry about flooding and damage elsewhere.
Tropical storm Isaac hit Puerto Rico Thursday and could be a Category 1 hurricane by Friday. Florida orange juice prices surged, but are now dropping as traders no longer fear a big hurricane.
US forecasters said Isaac will likely turn into a Category 1 hurricane by Friday as it nears the Dominican Republic and Haiti.
Tropical storm Isaac could be a hurricane by later Thursday, and arrive in Florida by Monday, the start of the GOP convention. Caribbean nations brace for the arrival of tropical storm Isaac.
Tropical storm Isaac is forecast to hit Guantánamo Bay Saturday, prompting the judge in charge of the trial of alleged 9/11 mastermind Khalid Sheikh Mohammed to put off proceedings.
Isaac is now a tropical storm in the Caribbean. By Monday, forecasters say, it is expected to be just off Florida's coast east of Homestead. As for Tampa, Tuesday looks to be likely day for a soaking.
Tropical Storm Isaac could become a hurricane by Thursday. Republican National Convention planners have prepped for a hurricane to hit next week in Tampa.
It's still a tropical depression, but forecasters expect it to become a hurricane by early Thursday. Some models show it dousing Tampa, Fla. – and the Republican National Convention – next week.