Moderate

At 540 PM MDT, Doppler radar was tracking a strong thunderstorm over Porcupine, or 17 miles northeast of Pine Ridge, moving southeast at 25 mph. HAZARD...Wind gusts up to 40 mph and nickel 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... Porcupine, Wounded Knee, Batesland, Wakpamni, Swett, Porcupine Butte Housing and southern Pine Ridge Reservation.

At 541 PM MDT, Doppler radar was tracking a strong thunderstorm near Haystack Buttes, or 31 miles northeast of Belle Fourche, moving southeast at 15 mph. HAZARD...Wind gusts up to 40 mph and nickel 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... Castle Rock, Hoover, Haystack Buttes, Two Top Butte and Dears Ears Butte.

At 541 PM MDT, Doppler radar was tracking an outflow boundary along a line extending from Pavillion to 7 miles northwest of Ethete. Movement was southeast at 40 mph. HAZARD...Wind gusts up to 50 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could blow around unsecured objects. Strong thunderstorms will be near... Pavillion, Kinnear, Pilot Butte Reservoir, and Ocean Lake around 545 PM MDT. Ethete around 550 PM MDT. Other locations in the path of these storms include western Riverton.

At 543 PM MDT, Doppler radar was tracking a strong thunderstorm 21 miles northwest of Henrys Lake, moving east at 35 mph. HAZARD...Wind gusts up to 50 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Yellowstone Village and Raynolds Pass. If outdoors, consider seeking shelter inside a building. This storm may intensify, so be certain to monitor local radio

At 543 PM MDT, Doppler radar was tracking a strong thunderstorm near Gallatin Lake, which is 11 miles northeast of West Yellowstone, moving east at 30 mph. HAZARD...Wind gusts up to 50 mph and half inch hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. This strong thunderstorm will be near... Gallatin Lake around 550 PM MDT. Grizzly Lake around 600 PM MDT.

At 442 PM PDT, Doppler radar was tracking a strong thunderstorm near Fish Creek Wash, or 8 miles southeast of Hwy 78 Between S2 And Borrego Springs Rd, moving northeast at 20 mph. HAZARD...Wind gusts up to 50 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Hwy 78 Between Borrego Springs Rd And Ocotillo Wells, Hwy 78 Between

At 618 PM CDT, Doppler radar was tracking a strong thunderstorm 9 miles northwest of Midway, or 24 miles southeast of Winnfield, moving south at 10 mph. HAZARD...Wind gusts up to 50 mph and pea 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... Midway, Pollock, Rogers, Fishville, Nebo, Zenoria and Catahoula Lake.

At 518 PM MDT, Doppler radar was tracking strong thunderstorms along a line extending from 16 miles south of Truckton to Fowler. Movement was northeast at 45 mph. HAZARD...Wind gusts of 50 to 55 mph and nickel size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Fowler, Ordway, Manzanola, Olney Springs, Sugar City, and Crowley.

At 518 PM MDT, Doppler radar was tracking a strong thunderstorm near Corral Creek Campground, or 50 miles southeast of Rawlins, moving east at 35 mph. HAZARD...Wind gusts of 50 to 55 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Savage Run Wilderness, Six Mile Campground, Ryan Park, Skyline, Turpin Reservoir, Pelton Creek Campground, Sugar Loaf Campground,

At 520 PM MDT, Doppler radar was tracking a strong thunderstorm 11 miles north of Park Valley, or 23 miles south of Malta, moving east at 35 mph. HAZARD...Wind gusts of 50 to 55 mph and half inch 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... Snowville and Curlew Junction. This includes the following highways... Interstate 84 between mile markers 1 and 7.