The National Weather Service issued tornado warnings Wednesday evening for southwest and south central Oklahoma.
Authorities reported damage in the Lawton area from storms that passed through the area, including at the Goodyear tire plant.
The risk for tornadoes diminished for central Oklahoma as the storms hit cooler air, but the threat for tornadoes continued in southern sections of the state.
Colder air is moving in behind the storms and could bring a freeze to the region.
The National Weather Service says storms will intensify this evening, with the highest tornado potential coming between 5 and 11 p.m. in Central and Southwest Oklahoma.
A Tornado Watch has been issued until 11:00 p.m. for Central and Eastern Oklahoma. The counties included roughly follow the Interstate 44 corridor.
There are still questions about the exact timing of the storms, but the Norman Forecast Office advises residents to not leave work or school this afternoon without checking the weather first.