Alert archive / Wyoming / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 92, NWS Riverton, WY

July 30, 2025Hot Springs County, Wyoming

NWS Riverton, WY issued this severe thunderstorm warning at Jul 30, 2025, 4:37 PM MDT for Hot Springs County, Wyoming. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 30, 2025, 4:37 PM MDT (22:37 UTC)
Expired
Jul 30, 2025, 5:00 PM MDT
In force
23 min
Issued by
NWS Riverton, WY
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Hot Springs County, WY

The radar

The Riverton/Lander radar (KRIW), 73 km from the middle of the area, began a volume at 22:36 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Riverton, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 30, 12:16 PM MDT, 4 hours 21 minutes earlier.

Area forecast discussion, Jul 30, 12:16 PM MDT, 4 hours 21 minutes before
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Hazardous weather outlook, Jul 30, 3:08 AM MDT, 13 hours 29 minutes before
Hazardous Weather Outlook
National Weather Service Riverton WY
308 AM MDT Wed Jul 30 2025

WYZ001>020-022>030-311315-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Bighorn Basin-Southwest Bighorn Basin-Southeast Bighorn Basin-
Owl Creek and Bridger Mountains-Bighorn Mountains West-
Bighorn Mountains Southeast-Northeast Johnson County-
Southeast Johnson County-Teton and Gros Ventre Mountains-
Jackson Hole-Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
308 AM MDT Wed Jul 30 2025

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and tonight.

Showers and thunderstorms are expected to develop throughout the day
today. By the afternoon these showers and thunderstorms will spread
east of the Divide. Daytime heating and above normal moisture will be
capable of fueling the development of a few strong to severe
storms. The main hazards as a result of any strong to severe storms
will be large hail, strong gusty winds, and heavy downpours. Isolated
flash flooding will be possible with any showers or storms. Showers
and storms will start to gradually dissipate by the late evening
into the early morning hours Thursday.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday through Monday...Daily chances for afternoon showers and
thunderstorms. The best chances will remain over central and northern
WY with lesser chances elsewhere. Periodic heavy downpours will be
possible with any showers or thunderstorms that develop.
Precipitation chances will decrease through the weekend becoming more
focus across northern WY. Low min RH and breezy winds will develop
across southern WY. This may lead to elevated or near critical fire
weather conditions through the weekend.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

In the hours before

Special weather statement, Jul 30, 3:11 PM MDT, 1 hour 26 minutes before
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Special weather statement, Jul 30, 3:44 PM MDT, 53 minutes before
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Special weather statement, Jul 30, 3:53 PM MDT, 44 minutes before
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Special weather statement, Jul 30, 4:05 PM MDT, 32 minutes before
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Special weather statement, Jul 30, 4:21 PM MDT, 16 minutes before
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Special weather statement, Jul 30, 4:30 PM MDT, 7 minutes before
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The office that day

Everything else NWS Riverton, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 29, 6:12 PM MDTSevere Thunderstorm WarningRIWFremont48 min
Jul 29, 6:16 PM MDTSpecial Weather StatementRIW44 min
Jul 29, 6:38 PM MDTSevere Thunderstorm WarningRIWNatrona15 min
Jul 29, 6:45 PM MDTSevere Thunderstorm WarningRIWJohnson30 min
Jul 29, 7:10 PM MDTSevere Thunderstorm WarningRIWJohnson35 min
Jul 29, 7:22 PM MDTSevere Thunderstorm WarningRIWNatrona23 min
Jul 29, 7:42 PM MDTSevere Thunderstorm WarningRIWNatrona11 min
Jul 30, 4:02 AM MDTSpecial Weather StatementRIWHot Springs28 min
Jul 30, 4:31 AM MDTSpecial Weather StatementRIWWashakie29 min
Jul 30, 4:57 AM MDTSpecial Weather StatementRIWBig Horn33 min
Jul 30, 2:49 PM MDTSpecial Weather StatementRIWPark26 min
Jul 30, 3:11 PM MDTSpecial Weather StatementRIWHot Springs49 min
Jul 30, 3:44 PM MDTSpecial Weather StatementRIWHot Springs31 min
Jul 30, 3:53 PM MDTSpecial Weather StatementRIWPark37 min
Jul 30, 4:05 PM MDTSpecial Weather StatementRIWHot Springs25 min
Jul 30, 4:10 PM MDTSevere Thunderstorm WarningRIWHot Springs35 min
Jul 30, 4:21 PM MDTSpecial Weather StatementRIWHot Springs24 min
Jul 30, 4:30 PM MDTSpecial Weather StatementRIWPark30 min
Jul 30, 4:43 PM MDTSpecial Weather StatementRIWTeton32 min
Jul 30, 4:45 PM MDTSpecial Weather StatementRIWHot Springs30 min
Jul 30, 4:51 PM MDTSpecial Weather StatementRIWPark24 min
Jul 30, 4:54 PM MDTSpecial Weather StatementRIWWashakie36 min
Jul 30, 4:56 PM MDTSpecial Weather StatementRIWUinta34 min
Jul 30, 5:23 PM MDTSpecial Weather StatementRIWWashakie37 min
Jul 30, 5:38 PM MDTSpecial Weather StatementRIW37 min
Jul 30, 5:39 PM MDTSevere Thunderstorm WarningRIWBig Horn, Washakie36 min
Jul 30, 5:40 PM MDTSpecial Weather StatementRIWNatrona35 min
Jul 30, 5:50 PM MDTSpecial Weather StatementRIWBig Horn55 min
Jul 30, 5:53 PM MDTSevere Thunderstorm WarningRIWNatrona52 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2025Every severe thunderstorm warning in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.