Heavy Rain, Flood Threat Increasing On Gulf Coast

A tropical disturbance near the northern Gulf Coast only has a small window for development, but poses a threat of flooding rainfall, particularly in Louisiana, regardless.

Happening Now

The tropical disturbance, called "Invest 93L" by the National Hurricane Center, is centered near the northern Gulf Coast, moving westward. The chances of it becoming a tropical depression prior to moving over land and up the lower Mississippi Valley are now quite low.

Areas of locally heavy rain have already pushed westward into parts of Louisiana, as the radar image below shows.

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A flood advisory was issued early Thursday morning for parts of southeast Louisiana, including Baton Rouge. From 2 to 8 inches of rain had already fallen in a few areas near and north of Houma and Morgan City, Louisiana, according to the National Weather Service.

(MORE: What Is An 'Invest'?)

Flooding Rain Threat

The main threat for flooding rain near the Gulf Coast will be through Friday, though some isolated locally heavy rain may last into Saturday in parts of the lower Mississippi Valley.

The heaviest rain totals are expected along and south of the Interstate 10 corridor from extreme eastern Texas into southern Louisiana, southern Mississippi, southern Alabama and the western Florida Panhandle. Some of those area could pick up over 6 inches of rain through Saturday, with locally heavier amounts where bands of rain repeatedly track over the same area.

The National Weather Service has issued flood watches for all of southern Louisiana and parts of southern Mississippi.

(MORE: What To Do In A Flood)

Jonathan Erdman is a senior meteorologist at weather.com and has been covering national and international weather since 1996. Extreme and bizarre weather are his favorite topics. Reach out to him on Bluesky, X (formerly Twitter) and Facebook.