At 731 PM MDT, Doppler radar was tracking a strong thunderstorm over Sand Hollow State Park, or 24 miles southwest of Zion National Park, moving north at 45 mph.
HAZARD...Wind gusts up to 40 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... Washington, Hurricane, Quail Creek State Park, Sand Hollow State Park, Leeds and Pine Valley.
This includes Interstate 15 between mile markers 12 and 27.