Tropical Storm Bertha is fading, but its moisture plume is fueling a serious East Coast flood threat

Tropical Storm Bertha is dissipating over the Texas-Louisiana border, but its moisture plume is causing significant flooding threats across the Southeastern United States. Heavy rainfall is expected to continue through Friday, impacting areas from the Carolinas to Georgia and Alabama.
Why it matters
The storm demonstrates how secondary effects like moisture plumes can cause more widespread damage than the storm's center, posing ongoing risks to infrastructure.
[Breaking news update, published at 2:05 p.m. ET] Tropical Storm Bertha had moved inland as of 2 p.m. ET, according to the National Hurricane Center, and is now over the Texas-Louisiana border. The storm had maximum sustained winds of 45 mph, according to the center’s update. Bertha is expected to dissipate by Friday morning as it tracks farther inland. Major impacts are not expected in Texas, but the storm is kicking up winds on the coast and fueling showers and storms deep into South Texas. [Original story below, published at 12:59 p.m. ET] Bertha will make its final landfall on the northwest Gulf Coast later Thursday, bringing with it tropical storm-force wind gusts and rainfall to parts of the Texas and Louisiana coastlines. But its most widespread flooding rain threat is unfolding hundreds of miles away in the East.
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