At 331 PM MDT, Doppler radar was tracking a strong thunderstorm near St George, or 31 miles southwest of Zion National Park, moving north at 40 mph.
HAZARD...Wind gusts up to 50 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... St George, Washington, Santa Clara, Dameron Valley, Ivins, Snow Canyon State Park, Veyo, Pine Valley and Bloomington.
This includes the following highways... Interstate 15 between mile markers 3 and 15. Utah Route 18 between mile markers 0 and 18...and between mile markers 21 and 30.