they don't need a hurricane to cause serious disruptions. even a tropical storm could cause an eight-foot storm surge here. that would submerge the bridge and road behind me causing may your disruptions for the convention. matt gutman, abc news, tampa. isaac could strengthen into a hurricane. but the question is when? >> meteorologist jim dickey has the latest from accu-weather. good morning. tropical storm isaac continues to slowly strengthen as we head through the day today, drifting west-northwestward. bringing strong wind to hispaniola. big time flooding there. now going forward here, drift its way further northward and westward. end up in the gulf of mexico. water is warm. expect it to impact the gulf coast going forward. rob, paula. back to you. >> thank you, jim. this is such a tense time of year along the gulf coast. today is the 20th anniversary of hurricane andrew making landfall