Alert archive / Wyoming / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 5, NWS Riverton, WY
NWS Riverton, WY issued this severe thunderstorm warning at Jun 6, 2019, 4:40 PM MDT for Park County, Teton County, Wyoming. It was in force for 20 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 6, 2019, 4:40 PM MDT (22:40 UTC)
- Expired
- Jun 6, 2019, 5:00 PM MDT
- In force
- 20 min
- Issued by
- NWS Riverton, WY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Park County, WY, Teton County, WY
The radar
The Riverton/Lander radar (KRIW), 183 km from the middle of the area, began a volume at 22:42 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 6, 1:54 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 10.7 hours before the alert went out and 362 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1765 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 153 m²/s²
- 0-3 km storm-relative helicity
- 427 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 6, 3:36 PM MDT, 1 hour 4 minutes earlier.
Area forecast discussion, Jun 6, 3:36 PM MDT, 1 hour 4 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<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.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Jun 6, 3:49 AM MDT, 12 hours 51 minutes before
Hazardous Weather Outlook National Weather Service Riverton WY 349 AM MDT Thu Jun 6 2019 WYZ001>020-022>030-071200- 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- 349 AM MDT Thu Jun 6 2019 This Hazardous Weather Outlook is for Western and Central Wyoming. .DAY ONE...Today and Tonight Scattered thunderstorms in the west. A few thunderstorms could be strong to severe over the west late in the afternoon into the evening hours. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Warm temperatures Thursday and Friday will continue the higher elevation snowmelt resulting in rising water levels in creeks, streams, and rivers into this weekend. Friday...A chance of thunderstorms west and north. Mainly isolated thunderstorms elsewhere. Some thunderstorms could be strong in Johnson County. Windy many locations. Rain will turn to snow in the mountains Friday night with 2 to 3 inches of snow expected in Yellowstone Park and 1 to 2 inches expected above 9000 feet in the Teton Range and the Wind River Mountains. Saturday...A chance of thunderstorms the central and north with isolated activity in the south. .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, Jun 6, 2:39 PM MDT, 2 hours 1 minute before
Special Weather Statement National Weather Service Riverton WY 239 PM MDT Thu Jun 6 2019 WYZ004>006-062130- North Big Horn Basin-Southeast Big Horn Basin-Southwest Big Horn Basin- 239 PM MDT Thu Jun 6 2019 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL HOT SPRINGS...SOUTH CENTRAL BIG HORN AND NORTHWESTERN WASHAKIE COUNTIES UNTIL 330 PM MDT... At 238 PM MDT, Doppler radar was tracking a strong thunderstorm 13 miles northeast of Legend Rock State Petroglyph Site, which is 24 miles west of Worland, moving northeast at 35 mph. Penny size hail and winds in excess of 40 mph will be possible with this storm. This storm will remain over mainly rural areas of north central Hot Springs, south central Big Horn and northwestern Washakie Counties, including the following locations... Badlands Overlook and Washakie County Fairgrounds. LAT...LON 4385 10851 4394 10863 4430 10813 4404 10775 TIME...MOT...LOC 2038Z 235DEG 29KT 4396 10844 Myers
The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 2:39 PM MDT | Special Weather Statement | RIW | Hot Springs | 51 min |
| Jun 6, 4:58 PM MDT | Severe Thunderstorm Warning | RIW | Park, Teton | 17 min |
| Jun 6, 5:16 PM MDT | Special Weather Statement | RIW | 44 min | |
| Jun 6, 5:57 PM MDT | Special Weather Statement | RIW | Teton | 48 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.