Alert archive / Wyoming / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 32, NWS Riverton, WY

June 16, 2025Natrona County, Wyoming

NWS Riverton, WY issued this severe thunderstorm warning at Jun 16, 2025, 8:37 PM MDT for Natrona County, Wyoming. It was in force for 38 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
Jun 16, 2025, 8:37 PM MDT (02:37 UTC)
Expired
Jun 16, 2025, 9:15 PM MDT
In force
38 min
Issued by
NWS Riverton, WY
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Natrona County, WY

The radar

The Riverton/Lander radar (KRIW), 137 km from the middle of the area, began a volume at 02:40 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 Jun 16, 4:32 PM MDT, 4 hours 5 minutes earlier.

Area forecast discussion, Jun 16, 4:32 PM MDT, 4 hours 5 minutes before
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Hazardous weather outlook, Jun 16, 11:34 AM MDT, 9 hours 3 minutes before
Hazardous Weather Outlook
National Weather Service Riverton WY
1134 AM MDT Mon Jun 16 2025

WYZ001>020-022>030-171300-
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-
1134 AM MDT Mon Jun 16 2025

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...This Afternoon and Tonight.

Scattered thunderstorms, some possibly strong to severe, occur
between 2 PM and 8 PM. The greatest potential for strong outflow
wind and hail is in and around the Bighorn Basin and Johnson County.

Low relative humidity and a breezy westerly wind will create elevated
to critical fire weather conditions across southern Wyoming.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...Isolated to scattered thunderstorms, mainly along and east
of the Continental Divide during the afternoon.

Thursday through Saturday...Gusty westerly wind, low relative
humidity, and temperatures 10 to 15 degrees above normal combine to
generate elevated to critical fire weather conditions across
southern Wyoming. Much above normal temperatures across the entire
region each day.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Special weather statement, Jun 16, 4:48 PM MDT, 3 hours 49 minutes before
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Local storm report, Jun 16, 4:53 PM MDT, 3 hours 44 minutes before
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Local storm report, Jun 16, 5:05 PM MDT, 3 hours 32 minutes before
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Special weather statement, Jun 16, 5:08 PM MDT, 3 hours 29 minutes before
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Special weather statement, Jun 16, 5:26 PM MDT, 3 hours 11 minutes before
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Special weather statement, Jun 16, 5:46 PM MDT, 2 hours 51 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 16, 7:06 PM MDTSpecial Weather StatementRIWNatrona39 min
Jun 16, 7:25 PM MDTSpecial Weather StatementRIWNatrona35 min
Jun 16, 7:32 PM MDTSevere Thunderstorm WarningRIWNatrona43 min
Jun 16, 7:33 PM MDTSevere Thunderstorm WarningRIWNatrona27 min
Jun 16, 7:41 PM MDTSevere Thunderstorm WarningRIWNatrona34 min
Jun 16, 7:58 PM MDTSevere Thunderstorm WarningRIWNatrona47 min
Jun 16, 8:07 PM MDTSpecial Weather StatementRIWNatrona23 min
Jun 16, 8:09 PM MDTSevere Thunderstorm WarningRIWNatrona36 min
Jun 16, 8:22 PM MDTSpecial Weather StatementRIWNatrona38 min
Jun 17, 1:24 PM MDTSpecial Weather StatementRIWFremont36 min
Jun 17, 1:33 PM MDTSevere Thunderstorm WarningRIWFremont27 min
Jun 17, 1:56 PM MDTSpecial Weather StatementRIWFremont34 min
Jun 17, 2:00 PM MDTSpecial Weather StatementRIWNatrona30 min
Jun 17, 2:09 PM MDTSpecial Weather StatementRIWFremont36 min
Jun 17, 2:19 PM MDTSpecial Weather StatementRIW26 min
Jun 17, 2:33 PM MDTSevere Thunderstorm WarningRIWJohnson, Natrona27 min
Jun 17, 2:53 PM MDTSevere Thunderstorm WarningRIWJohnson, Natrona19 min
Jun 17, 2:54 PM MDTSpecial Weather StatementRIWNatrona36 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.