Gulf tropical rainstorm likely to strengthen before reaching flood-weary US coast this weekend
An organizing tropical rainstorm could become the Atlantic's next name and reach the central Gulf Coast this weekend, bringing torrential rain and worsening flooding in parts of the Southeast.
Bernie Rayno breaks down the details of a storm set to threaten the Gulf Coast.
A tropical rainstorm in the southwestern Gulf can bring another round of heavy rain to parts of the southeastern United States later this week and weekend, raising flooding concerns in areas recently drenched. There is a high chance that this will become Tropical Storm Isaias while over the Gulf.
"We are closely monitoring a mass of showers and thunderstorms in the Bay of Campeche this week," AccuWeather Lead Hurricane Meteorologist Alex DaSilva said.
This image of the Gulf was captured on Monday morning, Oct. 6, 2026, and shows a mass of showers and thunderstorms in the Bay of Campeche. AccuWeather has upgraded this area of interest as a tropical rainstorm to help raise public awareness of the upcoming impacts. (AccuWeather Enhanced RealVue™ Satellite)
Factors favoring tropical development
Gulf water temperatures are well into the 80s, providing ample warmth to support tropical development. Tropical systems generally develop over waters near 80 degrees Fahrenheit or warmer, although atmospheric conditions also determine whether a storm forms.
Wind shear, which is the change in wind speed or direction in the atmosphere, can disrupt a developing tropical system.
"We expect this mass of showers and thunderstorms to overcome wind shear and evolve into a tropical depression or storm," DaSilva explained.
For the time being, to raise public awareness and give an idea of the track and timing, AccuWeather meteorologists have dubbed the area of interest a tropical rainstorm. The AccuWeather RealImpact™ Scale for Hurricanes for this storm in Mexico is less than 1. This scale rates the storm in terms of flooding, wind damage, risk to lives, property and commerce. A rating for the U.S. is forthcoming.
The next name on the list for tropical storms in the Atlantic basin is Isaias.
Where will the storm go?
"Due to prevailing steering winds, the most likely path would be to the north-northeast toward the U.S. later this week with landfall along the central Gulf Coast this weekend," DaSilva said.
A dip in the jet stream will steer the system north-northeastward toward the central Gulf Coast.
At this time, AccuWeather meteorologists believe the storm is most likely to track near the panhandles of Mississippi, Alabama and Florida, as well as southeastern Louisiana. However, the track into the U.S. will depend on where the storm forms, how strong it becomes and surrounding atmospheric conditions.
Could this become a hurricane?
As of Oct. 6, the Atlantic basin has produced eight named storms and no hurricanes, with strengthening El Niño conditions helping to suppress activity. El Niño, the warm phase of a recurring climate pattern in the tropical Pacific, could become one of the strongest on record later this year. El Niño often leads to numerous tropical storms and hurricanes in the eastern Pacific and tends to suppress activity in the Atlantic through wind shear.
By early October, a typical Atlantic season has produced about 11 named storms, including five hurricanes and two major hurricanes.
"As this storm organizes and begins to drift north-northeastward, increasing wind shear may limit the amount of strengthening and could lead to the storm becoming distorted," DaSilva said.
Factoring in all the variables, AccuWeather meteorologists believe this storm has a high chance of becoming the Atlantic's first hurricane during the second half of this week.
Wind gusts of 40-80 mph are strong enough to knock down trees, lead to power outages and cause minor property damage. The AccuWeather Local StormMax™ wind gust is 100 mph for this storm. The strongest winds would be near and just east of where the center makes landfall.
Another peril on the storm's eastern side will likely be severe thunderstorms with the risk of tornadoes and waterspouts.
Heavy rain could worsen Gulf Coast flooding
Rainfall could be unevenly distributed, with little or no rain west of the center and the heaviest downpours to the east, DaSilva explained. Areas receiving the heaviest rain could get 1-4 inches, with locally up to 8 inches possible.
These amounts would be in addition to rain from the stalled front through midweek. The AccuWeather Local StormMax™ rainfall for the storm is 25 inches.
Several inches of rain have fallen in parts of the Gulf Coast, from the upper Texas coast to Florida, in recent days, providing relief from drought in some areas.
Additional heavy rain could trigger flash flooding and worsen flooding along streams, bayous and rivers. Some locations could experience moderate to major river flooding, while other areas receive further drought relief.
Should a tropical storm bring additional heavy rain to parts of this zone, moderate to major flooding could occur, while further long-term drought relief would also occur in other locations.
The area of interest could develop subtropical characteristics, combining features of tropical and non-tropical storms.
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