The tornado watch initially set to expire at 6 p.m. has been extended until 1 a.m. Monday, the National Weather Service said.
The watch is in effect for Muscogee, Harris, Taylor, Talbot and Chattahoochee counties in Georgia. It's also in effect for Russell County in Alabama.
A tornado warning issued for Harris and Troup counties at 3:05 p.m. EST expired at 3:45 p.m. A severe thunderstorm capable of creating a tornado was near LaGrange, Ga., at that time and was moving northeast at 40 mph.
Flooding reports from Birmingham and Sylacauga, Ala., have reached the Peachtree City office of the weather service, though the only damage report from the Columbus area so far is a fallen tree limb in the driveway of a Harris County home, said Forecaster Laura Griffith.
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"Some of the storms have had some gusty winds," Griffith added. "We are still watching this event evolve."
There's a 100 percent chance of rain today and there could be a thunderstorm, which could be severe and bring between 3/4 and one inch of rain. The high will be around 65.
Tonight, the rain will continue, though the thunderstorm is expected to taper off after 1 a.m. The low will be around 49.
Monday is expected to be mostly sunny with highs around 62.