What can you tell from this streamline map?

A Streamline map just tells you the flow of air without an reference to the speed. What this streamlines tells me that there is a good onshore flow off the Gulf of Mexico, so there will likely be good amount of low level moisture available if any convection is present or expected to develop. There is a surface low located in central Florida. There is also a surface boundary located from Northeast Texas to Southeast Oklahoma to northwest Arkansas. This boundary could be a cold front, a dry line, or some kind of boundary where surface winds are converging along. Based on the cyclonic circulation a the north end of this convergence line, I would say that the boundary would likely be a cold front which is attached or ociated with an low pressure trough. If there are thunderstorms, that would be the most likely place you will see them. There is nothing in this surface stream lines that would indicate anything unusual is going on in the Atlanta area that would concern me. So this streamline graphic will not be much help if you are doing research work on this weather event for Atlanta.