Radar is indicating rotation in strong thunderstorms in Butler, Marion and Stafford counties, prompting the National Weather Service to issue tornado warnings.
Large hail has been reported in El Dorado. Any tornado is likely to be hidden within heavy rain, officials said.
The tornado warning in Stafford County states that the storm is moving northeast toward St. John and rural areas nearby. Meteorologists are warning that any tornado may well be rain-wrapped and difficult to see.
The Marion County thunderstorm with rotation is near Florence and moving toward Cedar Point. Authorities are urging residents to seek shelter.