Alert archive / Wyoming / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 69, NWS Riverton, WY
NWS Riverton, WY issued this severe thunderstorm warning at Jul 3, 2023, 6:58 PM MDT for Natrona County, Wyoming. It was in force for 32 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, 2023, 6:58 PM MDT (00:58 UTC)
- Expired
- Jul 3, 2023, 7:30 PM MDT
- In force
- 32 min
- Issued by
- NWS Riverton, WY
- Area
- Storm-based polygon
- Tornado
- Possible
- Damage threat
- Considerable
- Hail
- 1.5 in
- Wind
- 70.0 mph
County Natrona County, WY
The radar
The Riverton/Lander radar (KRIW), 137 km from the middle of the area, began a volume at 00:59 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 3, 3:03 PM MDT | Severe Thunderstorm Watch | SPC | 11 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 1.0 hours before the alert went out and 339 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
- 3225 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 1115 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 3.3
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, 5:39 PM MDT, 1 hour 19 minutes earlier.
Area forecast discussion, Jul 3, 5:39 PM MDT, 1 hour 19 minutes before
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</html>Hazardous weather outlook, Jul 3, 3:31 AM MDT, 15 hours 27 minutes before
Hazardous Weather Outlook National Weather Service Riverton WY 331 AM MDT Mon Jul 3 2023 WYZ001>020-022>030-041300- 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- 331 AM MDT Mon Jul 3 2023 This Hazardous Weather Outlook is for Western and Central Wyoming. .DAY ONE...Today and tonight. Strong to possibly severe thunderstorms this afternoon and evening across the northern half of the state. High wind gusts will be the most widespread threat, with large hail and an isolated tornado possible in northwestern areas. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Tuesday...Strong thunderstorms possible in the south. Much cooler East of the Divide. Thursday and Friday...Scattered showers and thunderstorms will continue in the afternoon and evening. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please report significant weather.
In the hours before
Local storm report, Jul 3, 4:43 PM MDT, 2 hours 15 minutes before
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</html>Local storm report, Jul 3, 5:03 PM MDT, 1 hour 55 minutes before
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</html>Local storm report, Jul 3, 5:19 PM MDT, 1 hour 39 minutes before
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</html>Local storm report, Jul 3, 5:20 PM MDT, 1 hour 38 minutes before
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</html>Special weather statement, Jul 3, 5:26 PM MDT, 1 hour 32 minutes before
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</html>Special weather statement, Jul 3, 5:36 PM MDT, 1 hour 22 minutes before
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<div class="status" id="status">Temporary Notice</div>
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<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
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If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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</html>The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 6:00 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 60 min |
| Jul 3, 10:33 PM MDT | Severe Thunderstorm Warning | RIW | Fremont | 27 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 2023Every severe thunderstorm warning in 2023
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.