from the role call that begins. it will formally put mitt romney up for the presidential nomination. i m wolf blitzer in tampa. you re in the situation room. all that coming up. let s get straight to hurricane isaac though. it s closing in on the gulf coast right now expected to make landfall a few hours from now. it s more than a chilling coincidence for a region marking the seventh anniversary of hurricane katrina. chad myers is over at the cnn weather center. he s got a look at what s going on. the latest update, chad, what is the latest on isaac? it is going to be a surge storm, not really a wind event for most people, 75 miles per hour, most homes can survive that. most trees will be okay. maybe some things will be falling over, knocked over, bump in the night. this is all the way from mobile to new orleans into pontchartrain itself and down through here through parish. this is where most of that surge is going to come. if you re on the other side of the storm, you