The National Hurricane Center is tracking three tropical waves, including two in the Caribbean. Tropical wave 1: A far eastern Atlantic tropical wave is near 30W from 17N southward, and moving west at 11 mph.

Downpours are expected in Houston on Friday as a tropical disturbance along the northern coast of the Gulf of Mexico stalls without strengthening.

Invest 93L is currently churning in the Gulf and is expected to pick up a bit of steam before it makes landfall in Louisiana early Thursday afternoon.

The Florida Panhandle will see heavy rainfall from Invest 93L after it reaches the Gulf on Wednesday. The greatest threat to the area at the moment is flash flooding in low-lying, poor-drainage areas and urban locations. Invest 93L is currently expected to make landfall near Louisiana's southeastern coast Thursday morning.

"Heavy rain is already moving through Louisiana and will continue over the next few days," AccuWeather's Alex DaSilva said.

While most of Texas will stay dry over the next several days, far East Texas will have a chance of significant tropical rainfall.

Prepare for rain, New Orleans. A low pressure system headed for the Gulf of Mexico is expected to bring heavy rain, thunderstorms and gusty winds to south Louisiana later this week, though just how much of each is still in question.

If the storm were to speed up, it would push the tropical rain across the central Gulf Coast. A storm which stalls over the Gulf or Louisiana could result in more widespread heavy rain and flooding.

"At this time, the intensity will range from a sprawling tropical rainstorm to perhaps a strike from a more compact, full-blown hurricane," Rayno said, adding that wind shear in the Gulf of Mexico ...