While the storm did not yet have hurricane-force winds, it was forecast to bring torrential rains of up to 25 inches (64 cm) in certain places, which officials said risked flooding along the already-swollen lower Mississippi River.
Officials canceled a Sunday night concert by the Rolling Stones. Residents were ordered to evacuate some nearby areas, but the New Orleans mayor said no evacuations were ordered from the low-lying city which strengthened its flood defenses after devastating Hurricane Katrina in 2005.
Barry packed maximum sustained winds of 65 miles per hour (100 km per hour) on Friday morning and was centered 105 miles (170 km) west-southwest of the mouth of the Mississippi River.
Barry will likely strengthen into a hurricane, the National Hurricane Center said, with winds of at least 74 mph (119 km) by the time it reaches the central Louisiana coast on Saturday.
(Production: Mana Rabiee)