NORMAN, Okla. (AP) - No damage or injuries have been reported after the National Weather Service says a tornado touched down in south-central Oklahoma.

Meteorologist Vivek Mahale says a tornado touched down in Stephens County just after 7 p.m. Sunday.

Neither the weather service nor the Stephens County Sheriff's Office had any immediate reports of damage or injuries.

Twenty-nine Oklahoma Counties are under a tornado watch until 9 p.m., but Mahale says most of the storms are showing weakening trends.

The risk of severe storms will shift east on Monday and include all of eastern Oklahoma and western Arkansas. The storms could produce large hail and damaging winds, with tornadoes possible.

The potential for storms will gradually shift into central and eastern Arkansas Monday and Monday night.