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Home Return to list Severe Thunderstorm Warning 0017 Issued by the Riverton Forecast Office
Action: New Issued At: 2026-06-20 18:15:02
651
WUUS55 KRIW 202314
SVRRIW
WYC019-210015-
/O.NEW.KRIW.SV.W.0017.260620T2314Z-260621T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Riverton WY
514 PM MDT Sat Jun 20 2026
The National Weather Service in Riverton has issued a
* Severe Thunderstorm Warning for...
Northern Johnson County in north central Wyoming...
* Until 615 PM MDT.
* At 513 PM MDT, a severe thunderstorm was located 16 miles southeast
of Buffalo, moving northeast at 35 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* This severe thunderstorm will remain over mainly rural areas of
northern Johnson County, including the following locations... South
Fork Campground, Buffalo Johnson County Airport, Lost Cabin
Campground, and Johnson County Fairgrounds.
This includes the following highways...
Interstate 25 between mile markers 276 and 299.
Interstate 90 between mile markers 42 and 95.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4380 10602 4379 10602 4421 10715 4456 10715
4456 10601
TIME...MOT...LOC 2313Z 213DEG 29KT 4413 10656
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH
$$
Rowe
Action: Continued Issued At: 2026-06-20 18:30:03 023 WWUS55 KRIW 202329 SVSRIW Severe Weather Statement National Weather Service Riverton WY 529 PM MDT Sat Jun 20 2026 WYC019-210015- /O.CON.KRIW.SV.W.0017.000000T0000Z-260621T0015Z/ Johnson- 529 PM MDT Sat Jun 20 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM MDT FOR NORTHEASTERN JOHNSON COUNTY... At 529 PM MDT, a severe thunderstorm was located 14 miles southeast of Buffalo, moving northeast at 35 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Buffalo, Powder River Rest Area, Fort Phil Kearny Historical Site, Saddlestring, Lake De Smet, South Fork Campground, Johnson County Fairgrounds, and Buffalo Johnson County Airport. This includes the following highways... Interstate 25 between mile markers 289 and 299. Interstate 90 between mile markers 42 and 95. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4408 10602 4425 10697 4456 10705 4456 10601 TIME...MOT...LOC 2329Z 213DEG 29KT 4424 10646 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...OBSERVED MAX WIND GUST...60 MPH $$ Rowe Action: Expired Issued At: 2026-06-20 19:11:04 129 WWUS55 KRIW 210010 SVSRIW Severe Weather Statement National Weather Service Riverton WY 610 PM MDT Sat Jun 20 2026 WYC019-210020- /O.EXP.KRIW.SV.W.0017.000000T0000Z-260621T0015Z/ Johnson- 610 PM MDT Sat Jun 20 2026 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JOHNSON COUNTY WILL EXPIRE AT 615 PM MDT... The storm which prompted the warning has weakened below severe limits, and no longer poses an immediate threat to life or property. Therefore, the warning will be allowed to expire. However, gusty winds are still possible with this thunderstorm. A Severe Thunderstorm Watch remains in effect until 900 PM MDT for north central Wyoming. && LAT...LON 4408 10602 4425 10697 4456 10705 4456 10601 TIME...MOT...LOC 0010Z 213DEG 29KT 4451 10622 $$ Rowe | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||