Alert archive / Wyoming / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 63, NWS Riverton, WY

July 9, 2019Big Horn County, Wyoming

NWS Riverton, WY issued this severe thunderstorm warning at Jul 9, 2019, 1:02 PM MDT for Big Horn County, Wyoming. It was in force for 28 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 9, 2019, 1:02 PM MDT (19:02 UTC)
Expired
Jul 9, 2019, 1:30 PM MDT
In force
28 min
Issued by
NWS Riverton, WY
Area
Storm-based polygon
Hail
1.25 in
Wind
50.0 mph

County Big Horn County, WY

The radar

The Billings radar (KBLX), 155 km from the middle of the area, began a volume at 19:03 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 8, 5:01 PM MDT, 20 hours 1 minute earlier.

Area forecast discussion, Jul 8, 5:01 PM MDT, 20 hours 1 minute before
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Hazardous weather outlook, Jul 8, 2:05 PM MDT, 22 hours 57 minutes before
Hazardous Weather Outlook
National Weather Service Riverton WY
205 PM MDT Mon Jul 8 2019

WYZ001>020-022>030-092015-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Big Horn Basin-Southwest Big Horn Basin-
Southeast Big Horn 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-
205 PM MDT Mon Jul 8 2019

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...This afternoon and Tonight.

Scattered thunderstorms through this evening. Some storms could
be severe, especially across the Bighorn Basin to Johnson County
and the surrounding mountains. Large hail, damaging winds and
locally heavy rain will be the primary hazards, but an isolated
tornado could occur.

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

Tuesday...Isolated thunderstorms possible in northern Wyoming.

Friday through Sunday...Isolated to locally scattered
thunderstorms. The best chance will be across the north.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

TEAM RIVERTON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 6:03 PM MDTSpecial Weather StatementRIWSheridan27 min
Jul 8, 6:13 PM MDTSpecial Weather StatementRIWJohnson32 min
Jul 8, 6:26 PM MDTSpecial Weather StatementRIWJohnson34 min
Jul 8, 6:27 PM MDTSpecial Weather StatementRIWFremont48 min
Jul 8, 6:32 PM MDTSpecial Weather StatementRIWJohnson28 min
Jul 8, 6:43 PM MDTSpecial Weather StatementRIWJohnson32 min
Jul 8, 6:48 PM MDTSpecial Weather StatementRIWFremont27 min
Jul 8, 7:02 PM MDTSpecial Weather StatementRIWJohnson28 min
Jul 8, 7:12 PM MDTSevere Thunderstorm WarningRIWJohnson38 min
Jul 8, 7:18 PM MDTSpecial Weather StatementRIWHot Springs27 min
Jul 8, 7:21 PM MDTSpecial Weather StatementRIWFremont24 min
Jul 8, 7:41 PM MDTSpecial Weather StatementRIWJohnson34 min
Jul 8, 7:42 PM MDTSpecial Weather StatementRIW33 min
Jul 9, 8:09 AM MDTSpecial Weather StatementRIW36 min
Jul 9, 9:25 AM MDTSpecial Weather StatementRIWFremont50 min
Jul 9, 12:08 PM MDTSpecial Weather StatementRIW22 min
Jul 9, 12:10 PM MDTSpecial Weather StatementRIWNatrona35 min
Jul 9, 12:12 PM MDTSpecial Weather StatementRIWJohnson33 min
Jul 9, 12:33 PM MDTSpecial Weather StatementRIWJohnson27 min
Jul 9, 12:50 PM MDTSpecial Weather StatementRIWBig Horn25 min
Jul 9, 1:11 PM MDTSpecial Weather StatementRIW34 min
Jul 9, 1:18 PM MDTSpecial Weather StatementRIWJohnson27 min
Jul 9, 1:26 PM MDTSpecial Weather StatementRIWBig Horn34 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2019Every severe thunderstorm warning in 2019

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.