BATON ROUGE - More than 12,000 Entergy customers in East and West Baton Rouge parishes were in the dark Sunday when an afternoon thunderstorm swept through the area. 

At 5 p.m., the Entergy outage map showed 9,195 customers out of power on the east side of the Mississippi River and 7,359 on the west. 

According to Storm Station meteorologists, both parishes were put under a severe thunderstorm warning at 3:45 p.m. that expired at 4:30 p.m. For more information about the weather, click here.