At 1204 PM MDT, Doppler radar was tracking a strong thunderstorm over Quail Creek State Park, or 21 miles southwest of Zion National Park, moving north at 55 mph. HAZARD...Wind gusts up to 40 mph and half inch 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... Hurricane, New Harmony, Quail Creek State Park, Toquerville, Leeds and Pine Valley. This includes Interstate 15 between mile markers 16 and 30.