Rains and wind from Tropical Storm Isaac have begun hitting the Florida Keys, as Republican National Convention officials in Tampa continue to adjust plans for events in the city. 

A party at Tropicana field at 5 p.m. ET will go on, though a later outdoor Lynyrd Skynyrd performance has been canceled. 

From the Capital Weather Gang's most recent update

Rainbands have been affecting all of southern Florida during the night and into the day, bringing with them gusty winds, torrential rain, and the risk of tornadoes... The official forecast track has shifted west along with the model guidance. While the eastern Florida panhandle looked most likely for a landfall site a couple days ago, the latest consensus is further west, clustered over Mississippi and eastern Louisiana.