If outdoors, consider seeking shelter inside a building.

At 958 AM CDT, Doppler radar was tracking a strong thunderstorm 6 miles southeast of Cooperton, moving southeast at 15 mph. HAZARD...Wind gusts of 50 to 55 mph and penny size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Northwestern Lawton, Cache, Indiahoma, Cooperton, Fort Sill, Meers, Wichita Mountains Wildlife Refuge, Mount Scott, Doris Campground, and The Visitor Center.