Alert archive / Wyoming / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 28, NWS Riverton, WY

July 3, 2019Johnson County, Wyoming

NWS Riverton, WY issued this severe thunderstorm warning at Jul 3, 2019, 7:06 PM MDT for Johnson County, Wyoming. It was in force for 24 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 3, 2019, 7:06 PM MDT (01:06 UTC)
Expired: Jul 3, 2019, 7:30 PM MDT
In force: 24 min
Issued by: NWS Riverton, WY
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Johnson County, WY

The radar

The Riverton/Lander radar (KRIW), 187 km from the middle of the area, began a volume at 01:06 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 3, 6:43 PM MDT, 23 minutes earlier.

Area forecast discussion, Jul 3, 6:43 PM MDT, 23 minutes before

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Hazardous weather outlook, Jul 3, 4:19 AM MDT, 14 hours 47 minutes before

Hazardous Weather Outlook
National Weather Service Riverton WY
419 AM MDT Wed Jul 3 2019

WYZ001>020-022>030-041200-
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-
419 AM MDT Wed Jul 3 2019

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight.

Isolated to scattered thunderstorms through this evening. A few
storms could be strong to possibly severe especially east of the
Continental Divide.

Elevated fire weather conditions across the extreme south this
afternoon.

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

Independence Day...Scattered afternoon and evening thunderstorms
across mainly northern and northwestern Wyoming. It will be driest
across southwest Wyoming.

.SPOTTER INFORMATION STATEMENT...

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

TEAM RIVERTON

In the hours before

Special weather statement, Jul 3, 5:16 PM MDT, 1 hour 50 minutes before

Special Weather Statement
National Weather Service Riverton WY
516 PM MDT Wed Jul 3 2019

WYZ005>007-032345-
Owl Creek and Bridger Mountains-Southeast Big Horn Basin-Southwest
Big Horn Basin-
516 PM MDT Wed Jul 3 2019

...SPECIAL WEATHER STATEMENT...

At 513 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 9 miles west of Winchester to 10 miles south of
Hamilton Dome. Movement was to the east northeast at 30 mph.

Pea size hail has been reported by an emergency management official
at 510 PM northwest of the Hot Springs county airport along Highway
120.  Pea size hail and wind gusts to 40 mph will be possible with
these storms.

These storms will remain over mainly rural areas of central Hot
Springs and central Washakie Counties. Other ares that will be
impacted...Hot Springs County Fairgrounds and Hot Springs County
Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Brief heavy rain is also occurring with these storms.

&&

LAT...LON 4395 10775 4359 10798 4356 10867 4389 10835
TIME...MOT...LOC 2313Z 217DEG 29KT 4388 10834 4362 10859

AR

Special weather statement, Jul 3, 5:22 PM MDT, 1 hour 44 minutes before

Special Weather Statement
National Weather Service Riverton WY
522 PM MDT Wed Jul 3 2019

WYZ005-007-032345-
Owl Creek and Bridger Mountains-Southwest Big Horn Basin-
522 PM MDT Wed Jul 3 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL HOT SPRINGS COUNTY
UNTIL 545 PM MDT...

At 521 PM MDT, Doppler radar was tracking a strong thunderstorm 16
miles south of Hamilton Dome, which is 18 miles southwest of
Thermopolis, moving northeast at 25 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

This storm will remain over mainly rural areas of south central Hot
Springs County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Brief heavy rain is also occurring with this storm.

&&

LAT...LON 4371 10830 4353 10818 4346 10842 4346 10844
      4345 10848 4344 10849 4344 10852 4343 10853
      4345 10854 4346 10856 4347 10856 4349 10859
      4351 10865 4357 10870
TIME...MOT...LOC 2321Z 239DEG 16KT 4353 10855

AR

Special weather statement, Jul 3, 6:15 PM MDT, 51 minutes before

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Special weather statement, Jul 3, 6:20 PM MDT, 46 minutes before

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Special weather statement, Jul 3, 6:42 PM MDT, 24 minutes before

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Special weather statement, Jul 3, 6:48 PM MDT, 18 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 6:15 PM MDT	Special Weather Statement	RIW	Johnson	30 min
Jul 3, 6:20 PM MDT	Special Weather Statement	RIW	Washakie	40 min
Jul 3, 6:42 PM MDT	Special Weather Statement	RIW	Johnson	33 min
Jul 3, 6:48 PM MDT	Special Weather Statement	RIW	Johnson	27 min
Jul 3, 7:04 PM MDT	Severe Thunderstorm Warning	RIW	Johnson	26 min
Jul 3, 7:24 PM MDT	Special Weather Statement	RIW	Johnson	21 min
Jul 3, 7:34 PM MDT	Special Weather Statement	RIW	Natrona	26 min
Jul 3, 7:46 PM MDT	Severe Thunderstorm Warning	RIW	Johnson	29 min
Jul 3, 8:13 PM MDT	Severe Thunderstorm Warning	RIW	Johnson	32 min
Jul 3, 8:17 PM MDT	Severe Thunderstorm Warning	RIW	Natrona	43 min
Jul 3, 9:22 PM MDT	Severe Thunderstorm Warning	RIW	Natrona	38 min
Jul 3, 11:58 PM MDT	Special Weather Statement	RIW	Natrona	47 min
Jul 4, 12:35 AM MDT	Special Weather Statement	RIW		40 min
Jul 4, 12:37 AM MDT	Special Weather Statement	RIW		38 min
Jul 4, 1:18 AM MDT	Special Weather Statement	RIW	Hot Springs	27 min
Jul 4, 2:46 AM MDT	Special Weather Statement	RIW	Fremont	29 min
Jul 4, 2:59 AM MDT	Special Weather Statement	RIW	Fremont	31 min
Jul 4, 3:37 AM MDT	Severe Thunderstorm Warning	RIW	Fremont, Natrona	38 min
Jul 4, 4:09 AM MDT	Special Weather Statement	RIW		51 min
Jul 4, 4:14 AM MDT	Severe Thunderstorm Warning	RIW	Natrona	61 min
Jul 4, 4:54 AM MDT	Special Weather Statement	RIW	Johnson	66 min
Jul 4, 5:05 AM MDT	Severe Thunderstorm Warning	RIW	Natrona	55 min
Jul 4, 5:53 AM MDT	Severe Thunderstorm Warning	RIW	Natrona	37 min
Jul 4, 1:41 PM MDT	Special Weather Statement	RIW	Fremont	34 min
Jul 4, 2:07 PM MDT	Special Weather Statement	RIW		23 min
Jul 4, 2:26 PM MDT	Special Weather Statement	RIW	Fremont	34 min
Jul 4, 2:36 PM MDT	Special Weather Statement	RIW		24 min
Jul 4, 2:55 PM MDT	Special Weather Statement	RIW	Hot Springs	35 min
Jul 4, 3:07 PM MDT	Special Weather Statement	RIW	Hot Springs	23 min
Jul 4, 3:19 PM MDT	Special Weather Statement	RIW	Johnson	26 min
Jul 4, 3:20 PM MDT	Special Weather Statement	RIW	Fremont	25 min
Jul 4, 3:22 PM MDT	Special Weather Statement	RIW	Johnson	23 min
Jul 4, 3:27 PM MDT	Special Weather Statement	RIW	Hot Springs	33 min
Jul 4, 3:30 PM MDT	Special Weather Statement	RIW	Hot Springs	30 min
Jul 4, 3:33 PM MDT	Severe Thunderstorm Warning	RIW	Johnson	42 min
Jul 4, 3:38 PM MDT	Severe Thunderstorm Warning	RIW	Hot Springs	41 min
Jul 4, 3:47 PM MDT	Severe Thunderstorm Warning	RIW	Fremont, Hot Springs	43 min
Jul 4, 3:51 PM MDT	Special Weather Statement	RIW	Natrona	24 min
Jul 4, 4:03 PM MDT	Severe Thunderstorm Warning	RIW	Natrona	42 min
Jul 4, 4:12 PM MDT	Special Weather Statement	RIW	Fremont	33 min
Jul 4, 4:15 PM MDT	Special Weather Statement	RIW		45 min
Jul 4, 4:15 PM MDT	Severe Thunderstorm Warning	RIW	Johnson	31 min
Jul 4, 4:20 PM MDT	Special Weather Statement	RIW	Washakie	25 min
Jul 4, 4:24 PM MDT	Special Weather Statement	RIW	Washakie	36 min
Jul 4, 4:31 PM MDT	Special Weather Statement	RIW	Hot Springs	44 min
Jul 4, 4:38 PM MDT	Severe Thunderstorm Warning	RIW	Big Horn, Washakie	52 min
Jul 4, 4:45 PM MDT	Special Weather Statement	RIW	Natrona	30 min
Jul 4, 4:46 PM MDT	Special Weather Statement	RIW	Fremont	29 min
Jul 4, 4:50 PM MDT	Severe Thunderstorm Warning	RIW	Hot Springs, Washakie	40 min
Jul 4, 4:55 PM MDT	Severe Thunderstorm Warning	RIW	Fremont	50 min
Jul 4, 5:05 PM MDT	Severe Thunderstorm Warning	RIW	Natrona	40 min
Jul 4, 5:25 PM MDT	Special Weather Statement	RIW	Hot Springs	35 min
Jul 4, 5:25 PM MDT	Severe Thunderstorm Warning	RIW	Johnson, Washakie	50 min
Jul 4, 5:35 PM MDT	Tornado Warning	RIW	Natrona	25 min
Jul 4, 5:52 PM MDT	Areal Flood Advisory	RIW	Hot Springs, Washakie	3 hr
Jul 4, 5:53 PM MDT	Tornado Warning	RIW	Johnson, Washakie	14 min
Jul 4, 5:59 PM MDT	Special Weather Statement	RIW	Natrona	31 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2019 Every 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.