Tropical Storm Arthur fuels life-threatening flooding, damaging winds along the Gulf Coast
Arthur is the first named storm of the 2026 Atlantic hurricane season.
Tropical Storm Arthur forms in the Gulf, the first named storm of the 2026 Atlantic season
Tropical Storm Watches and Warnings were issued across parts of Texas and Louisiana as Tropical Storm Arthur formed on Wednesday, potentially bringing damaging winds, torrential rainfall and storm surge throughout the region. Arthur is the first named storm of the 2026 Atlantic hurricane season.
Tropical storm watches and warnings have been issued as Tropical Storm Arthur is expected to bring damaging winds, torrential rainfall and storm surge to parts of Texas and Louisiana on Wednesday.
WATCH: HEAVY RAIN TRIGGERS DANGEROUS FLASH FLOODING ACROSS TEXAS, PROMPTING MULTIPLE WATER RESCUES
Arthur is the first named storm of the 2026 Atlantic hurricane season. It strengthened into a named storm after being designated Potential Tropical Cyclone One.
A tropical storm is a tropical cyclone with maximum sustained winds between 39 and 73 mph, making it stronger than a tropical depression.
Tropical Storm Arthur currently has maximum sustained winds of 45 mph and is forecast to produce a storm surge of up to 2 to 4 feet from Port Bolivar, TX, to Morgan City, LA with up to 3 feet of storm surge possible in Galveston Bay.
The National Hurricane Center (NHC) has extended the Tropical Storm Warning westward to High Island, Texas, meaning a Warning is now in effect from High Island to Morgan City, Louisiana, while a Tropical Storm Watch continues further south from Sargent to High Island.
A Tropical Storm Warning means tropical storm conditions are expected within the warning area, generally within 36 hours. While a Tropical Storm Watch means tropical storm conditions are possible within the watch area, generally within 48 hours.
According to the FOX Forecast Center, the system strengthened as it moved northwest over the Gulf's warm waters, which provided the thermal energy needed to fuel the storm.
In addition, a large-scale lift associated with a sharp dip in the jet stream helped remove air from the storm's center, encouraging storms to develop and organize.
Watch: Torrential downpours turn Texas Highway into a river amid life-threatening flash flooding
Torrential downpours have turned hazardous in Waco, Texas, leaving Interstate 35 flowing like a river amid life-threatening flash flooding.
However, because the system spent limited time over water and continued to encounter moderate wind shear, forecasters expect strengthening to remain limited, likely keeping Arthur as a mid-tier tropical storm.
Forecasters warn that Tropical Storm Arthur could still bring damaging winds and a life-threatening flash flood threat to the Gulf Coast through the end of the week.
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A Level 3 out of 4 flood threat is in effect through Thursday morning, with the potential for widespread and locally catastrophic flooding across numerous cities, including Baton Rouge, New Orleans and Morgan City.
The NHC forecasts rainfall totals of 5 to 10 inches, with isolated amounts approaching 20 inches, through early Friday from the middle and upper Texas coast across much of Louisiana and into portions of central and southern Mississippi and Alabama.
Earlier this week, Texas Gov. Greg Abbott issued a disaster declaration for 101 counties and urged residents to take precautions and avoid driving on flooded roadways as severe weather continues to impact the state.
"Texas is prepared to respond to the severe weather threats that continue to move across our state," Abbott said in a statement. "Texans should heed the guidance of state and local officials and take all necessary precautions to stay safe during this severe weather."
Heavy rain swells waterways in Boerne, Texas, triggering severe flooding Monday. (City of Boerne/Facebook)
Meanwhile, nearly 3 million Louisiana residents remain under flash flood alerts.
Flooding concerns are expected to worsen, with Baton Rouge among one of the major cities located near the bull's eye of the heaviest rainfall.
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"This is a long-lasting event. It comes in phases," Norcross said. "It might look like the rain is letting up, but the worst of it could still be to come."
Stay with FOX Weather for the latest updates.