The National Hurricane Center (NHC), is tracking two systems that are going to play in the Gulf of Mexico this week. Let's start with what appears to be the bigger threat to the United States—newly formed Tropical Storm Delta. The system is on track to move into the Gulf of Mexico on Tuesday night, and should continue to the northwest before finding the edge of high pressure, after which time it should move north.
The National Hurricane Center forecasts the storm to reach 105 mph sustained winds by Thursday, after which some weakening could begin due to shear and cooler waters in the Northern Gulf of Mexico. Lots of uncertainty remains regarding intensity.
As for Tropical Storm Gamma, there are two potential outcomes, I think. One is that the storm spins around the southern Gulf of Mexico long enough that it eventually dissipates later this week. The second option is that some kind of a weak system gets pulled north, toward Louisiana, behind Delta. For now, I'd bet on the former option.
