Thunderstorms, hail slow cleanup efforts in Oklahoma City suburb hit by immense tornado

Jesse Edgar takes a break in the shade while helping salvage items at a friend's home Wednesday, May 22, 2013, in Moore, Okla. Cleanup continues two days after a huge tornado roared through the Oklahoma City suburb, flattening a wide swath of homes and businesses. (AP Photo/Charlie Riedel) (The Associated Press)

A band of thunderstorms is battering the Oklahoma City area and slowing cleanup operations in the southern suburb where a tornado killed 24 people and destroyed thousands of homes earlier this week.

The National Weather Service said Thursday that the storms are producing hail, heavy rain and high winds. A flash flood warning is also in effect for some areas.

The Weather Service says more severe storms are forecast for late afternoon and at night. It says tornados are a possibility.

The suburb of Moore was hit by a powerful twister Monday that shattered whole neighborhoods and hit two elementary schools. Ten children were among the dead.