Alert archive / Wyoming / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 9, NWS Riverton, WY
NWS Riverton, WY issued this severe thunderstorm warning at Jul 1, 2024, 3:41 PM MDT for Hot Springs County, Washakie County, Wyoming. It was in force for 49 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 1, 2024, 3:41 PM MDT (21:41 UTC)
- Expired
- Jul 1, 2024, 4:30 PM MDT
- In force
- 49 min
- Issued by
- NWS Riverton, WY
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Hot Springs County, WY, Washakie County, WY
The radar
The Riverton/Lander radar (KRIW), 89 km from the middle of the area, began a volume at 21:42 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.
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 9.7 hours before the alert went out and 87 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 318 J/kg
- Mixed-layer CIN
- -275 J/kg
- Mixed-layer LCL
- 1572 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 141 m²/s²
- 0-3 km storm-relative helicity
- 306 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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 1, 1:52 PM MDT, 1 hour 49 minutes earlier.
Area forecast discussion, Jul 1, 1:52 PM MDT, 1 hour 49 minutes before
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</html>Hazardous weather outlook, Jul 1, 1:46 PM MDT, 1 hour 55 minutes before
Hazardous Weather Outlook National Weather Service Riverton WY 146 PM MDT Mon Jul 1 2024 WYZ001>020-022>030-030000- 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- 146 PM MDT Mon Jul 1 2024 This Hazardous Weather Outlook is for Western and Central Wyoming. .DAY ONE...This afternoon and tonight. Strong to severe storms are possible, mainly for the Bighorn Basin and Johnson County. Strong sudden wind gusts, large hail, and frequent lightning are the main threats with these storms. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Tuesday through Thursday...Shower and thunderstorm chances, mainly for northern Wyoming, continue through midweek. Warm, dry, and breezy conditions across south-central and southwest Wyoming through the week will create critical fire weather conditions where the fuels are cured. .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 1, 2:11 PM MDT, 1 hour 30 minutes before
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</html>Local storm report, Jul 1, 2:47 PM MDT, 54 minutes before
Preliminary Local Storm Report
National Weather Service Riverton WY
247 PM MDT Mon Jul 1 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0238 PM Tstm Wnd Gst 2 NW Greybull 44.52N 108.08W
07/01/2024 M59 MPH Big Horn WY ASOS
ASOS station KGEY Greybull Airport.
&&
CFHSpecial weather statement, Jul 1, 3:00 PM MDT, 41 minutes before
Special Weather Statement
National Weather Service Riverton WY
300 PM MDT Mon Jul 1 2024
WYZ004-008-009-012130-
Bighorn Mountains Southeast-North Bighorn Basin-Bighorn Mountains
West-
300 PM MDT Mon Jul 1 2024
...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN JOHNSON...
SOUTHEASTERN BIG HORN AND NORTHEASTERN WASHAKIE COUNTIES THROUGH 330
PM MDT...
At 300 PM MDT, Doppler radar was tracking a strong thunderstorm near
Shell Canyon, which is 19 miles east of Greybull, moving east at 45
mph.
HAZARD...Wind gusts of 50 to 55 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
This strong thunderstorm will be near...
Upper Medicine Lodge Lake around 320 PM MDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 4466 10752 4465 10754 4463 10752 4464 10750
4461 10747 4461 10743 4460 10742 4460 10739
4456 10737 4456 10696 4406 10712 4414 10743
4417 10746 4417 10754 4425 10788 4470 10762
TIME...MOT...LOC 2100Z 283DEG 39KT 4451 10767
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH
HensleySpecial weather statement, Jul 1, 3:34 PM MDT, 7 minutes before
Special Weather Statement
National Weather Service Riverton WY
334 PM MDT Mon Jul 1 2024
WYZ008>010-012200-
Bighorn Mountains Southeast-Northeast Johnson County-Bighorn
Mountains West-
334 PM MDT Mon Jul 1 2024
...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN JOHNSON...
SOUTHEASTERN BIG HORN AND NORTHEASTERN WASHAKIE COUNTIES THROUGH 400
PM MDT...
At 334 PM MDT, Doppler radar was tracking a strong thunderstorm near
Cloud Peak, which is 19 miles west of Buffalo, moving east at 40 mph.
HAZARD...Wind gusts of 50 to 55 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
This storm will remain over mainly rural areas of northwestern
Johnson, southeastern Big Horn and northeastern Washakie Counties,
including the following locations... South Fork Campground, Buffalo
Johnson County Airport, and Lost Cabin Campground.
This includes Interstate 90 between mile markers 42 and 56.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4437 10670 4416 10678 4416 10682 4410 10681
4406 10682 4415 10744 4417 10746 4419 10747
4440 10730 4456 10731 4456 10667
TIME...MOT...LOC 2134Z 268DEG 35KT 4436 10711
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH
RoweThe office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 7:35 AM MDT | Special Weather Statement | RIW | Big Horn | 25 min |
| Jul 1, 9:40 AM MDT | Special Weather Statement | RIW | Big Horn | 20 min |
| Jul 1, 2:11 PM MDT | Special Weather Statement | RIW | Hot Springs | 34 min |
| Jul 1, 2:17 PM MDT | Severe Thunderstorm Warning | RIW | Hot Springs, Park, Washakie | 43 min |
| Jul 1, 2:37 PM MDT | Special Weather Statement | RIW | Big Horn | 23 min |
| Jul 1, 2:43 PM MDT | Special Weather Statement | RIW | Hot Springs | 32 min |
| Jul 1, 3:00 PM MDT | Special Weather Statement | RIW | Big Horn | 30 min |
| Jul 1, 3:00 PM MDT | Severe Thunderstorm Warning | RIW | Hot Springs, Washakie | 45 min |
| Jul 1, 3:34 PM MDT | Special Weather Statement | RIW | Johnson | 26 min |
| Jul 1, 3:59 PM MDT | Special Weather Statement | RIW | Sheridan | 46 min |
| Jul 1, 4:25 PM MDT | Severe Thunderstorm Warning | RIW | Johnson, Washakie | 35 min |
| Jul 1, 5:04 PM MDT | Special Weather Statement | RIW | Johnson | 26 min |
| Jul 1, 5:26 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 49 min |
| Jul 1, 5:35 PM MDT | Special Weather Statement | RIW | Johnson | 25 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 2024Every severe thunderstorm warning in 2024
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.