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Home Return to list Severe Thunderstorm Warning 0011 Issued by the Riverton Forecast Office
Action: New Issued At: 2026-06-20 15:59:28
540
WUUS55 KRIW 202059
SVRRIW
WYC013-025-202200-
/O.NEW.KRIW.SV.W.0011.260620T2059Z-260620T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Riverton WY
259 PM MDT Sat Jun 20 2026
The National Weather Service in Riverton has issued a
* Severe Thunderstorm Warning for...
Natrona County in central Wyoming...
East central Fremont County in central Wyoming...
* Until 400 PM MDT.
* At 258 PM MDT, severe thunderstorms were located along a line
extending from near Cottonwood Pass to near Powder River to 8 miles
south of Alcova, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Bates Hole and Goldeneye Reservoir around 310 PM MDT.
Emigrant Gap around 315 PM MDT.
Other locations in the path of these severe thunderstorms include
Casper, Mills, Red Butte, Red Wall, Paradise Valley, Bar Nunn,
Beartrap Meadows County Park, Evansville, Homa Hills and Antelope
Hills.
This includes Interstate 25 between mile markers 176 and 233.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4244 10716 4263 10752 4265 10790 4302 10778
4348 10750 4348 10608 4243 10608
TIME...MOT...LOC 2058Z 260DEG 36KT 4347 10748 4300 10697 4245 10666
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Wittmann
Action: Continued Issued At: 2026-06-20 16:29:29
486
WWUS55 KRIW 202128
SVSRIW
Severe Weather Statement
National Weather Service Riverton WY
328 PM MDT Sat Jun 20 2026
WYC013-202137-
/O.CAN.KRIW.SV.W.0011.000000T0000Z-260620T2200Z/
Fremont-
328 PM MDT Sat Jun 20 2026
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL FREMONT COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of Fremont
County. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM MDT for
central Wyoming.
&&
LAT...LON 4244 10675 4298 10740 4348 10742 4348 10608
4243 10608
TIME...MOT...LOC 2127Z 240DEG 93KT 4353 10717 4311 10638 4256 10598
$$
WYC025-202200-
/O.CON.KRIW.SV.W.0011.000000T0000Z-260620T2200Z/
Natrona-
328 PM MDT Sat Jun 20 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM MDT
FOR NATRONA COUNTY...
At 327 PM MDT, severe thunderstorms were located along a line
extending from 16 miles northwest of Red Wall to near Antelope Hills
to 7 miles southwest of Boxelder, moving northeast at 40 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Antelope Hills, Teapot Rock, Red Wall, Midwest and Edgerton.
This includes Interstate 25 between mile markers 176 and 232.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4244 10675 4298 10740 4348 10742 4348 10608
4243 10608
TIME...MOT...LOC 2127Z 240DEG 93KT 4353 10717 4311 10638 4256 10598
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
Wittmann
Action: Cancelled Issued At: 2026-06-20 16:29:29
486
WWUS55 KRIW 202128
SVSRIW
Severe Weather Statement
National Weather Service Riverton WY
328 PM MDT Sat Jun 20 2026
WYC013-202137-
/O.CAN.KRIW.SV.W.0011.000000T0000Z-260620T2200Z/
Fremont-
328 PM MDT Sat Jun 20 2026
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL FREMONT COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of Fremont
County. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM MDT for
central Wyoming.
&&
LAT...LON 4244 10675 4298 10740 4348 10742 4348 10608
4243 10608
TIME...MOT...LOC 2127Z 240DEG 93KT 4353 10717 4311 10638 4256 10598
$$
WYC025-202200-
/O.CON.KRIW.SV.W.0011.000000T0000Z-260620T2200Z/
Natrona-
328 PM MDT Sat Jun 20 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM MDT
FOR NATRONA COUNTY...
At 327 PM MDT, severe thunderstorms were located along a line
extending from 16 miles northwest of Red Wall to near Antelope Hills
to 7 miles southwest of Boxelder, moving northeast at 40 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Antelope Hills, Teapot Rock, Red Wall, Midwest and Edgerton.
This includes Interstate 25 between mile markers 176 and 232.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4244 10675 4298 10740 4348 10742 4348 10608
4243 10608
TIME...MOT...LOC 2127Z 240DEG 93KT 4353 10717 4311 10638 4256 10598
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
Wittmann
Action: Continued Issued At: 2026-06-20 16:49:29
083
WWUS55 KRIW 202149
SVSRIW
Severe Weather Statement
National Weather Service Riverton WY
349 PM MDT Sat Jun 20 2026
WYC025-202200-
/O.CON.KRIW.SV.W.0011.000000T0000Z-260620T2200Z/
Natrona-
349 PM MDT Sat Jun 20 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM MDT
FOR EASTERN NATRONA COUNTY...
At 348 PM MDT, severe thunderstorms were located along a line
extending from 7 miles west of Hole In The Wall to near Midwest to
near Deer Creek, moving northeast at 40 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Casper, Mills, Evansville, Bar Nunn, Red Butte, Midwest, Homa Hills,
Edgerton, Antelope Hills, Teapot Rock, Goldeneye Reservoir, Bates
Hole, Emigrant Gap, Beartrap Meadows County Park, Paradise Valley,
Red Wall, Natrona, Casper Natural Gas Processing Plant, Fort Caspar
Campground, and Casper Mountain.
This includes Interstate 25 between mile markers 176 and 232.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4244 10643 4294 10690 4348 10724 4348 10608
4243 10608
TIME...MOT...LOC 2148Z 228DEG 75KT 4355 10696 4333 10626 4287 10578
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
Wittmann
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