Alert archive / Wyoming / Special Weather Statements in 2021
Special Weather Statement, NWS Riverton, WY
NWS Riverton, WY issued this special weather statement at Jun 8, 2021, 2:10 PM MDT for Park County, Wyoming. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 8, 2021, 2:10 PM MDT (20:10 UTC)
- Expired
- Jun 8, 2021, 2:45 PM MDT
- In force
- 35 min
- Issued by
- NWS Riverton, WY
County Park County, WY
The radar
The Billings radar (KBLX), 126 km from the middle of the area, began a volume at 20:11 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
Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 8.2 hours before the alert went out and 430 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
- 3157 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 175 m²/s²
- 0-3 km storm-relative helicity
- 408 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Jun 8, 11:21 AM MDT, 2 hours 49 minutes earlier.
Area forecast discussion, Jun 8, 11:21 AM MDT, 2 hours 49 minutes before
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<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.
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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>Hazardous weather outlook, Jun 8, 3:20 AM MDT, 10 hours 50 minutes before
Hazardous Weather Outlook National Weather Service Riverton WY 320 AM MDT Tue Jun 8 2021 WYZ001>020-022>030-091300- 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- 320 AM MDT Tue Jun 8 2021 This Hazardous Weather Outlook is for Western and Central Wyoming. .DAY ONE...Today and Tonight. Elevated fire weather conditions today with very gusty winds and critically low humidities east of the Divide. Winds will diminish around sunset. High elevation snow melt will continue to feed high mountain fed creeks and streams, which continue to run high. Isolated showers and thunderstorms are possible across the northwest. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Wednesday and Thursday...Elevated fire weather conditions are possible each day mainly across central and southern areas. Gusty winds will increase Thursday. Mountain snowmelt continues with continued high water levels on creeks, streams, and rivers. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions.
In the hours before
Special weather statement, Jun 8, 2:10 PM MDT, 0 minutes before
Special Weather Statement
National Weather Service Riverton WY
210 PM MDT Tue Jun 8 2021
WYZ002-003-082045-
Cody Foothills-Absaroka Mountains-
210 PM MDT Tue Jun 8 2021
...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL PARK COUNTY UNTIL
245 PM MDT...
At 210 PM MDT, Doppler radar was tracking a strong thunderstorm near
Sunlight Basin, or 27 miles northeast of East Entrance, moving
northeast at 30 mph.
Pea size hail and winds in excess of 40 mph will be possible with
this storm.
This strong thunderstorm will be near...
Crandall Creek around 220 PM MDT.
Beartooth Pass around 240 PM MDT.
Other locations impacted by this storm include Dead Indian
Campground, Top Of The World Resort, Beartooth Lake Campground and
Clark Elementary School.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 4494 10914 4465 10954 4474 10976 4500 10964
4501 10933
TIME...MOT...LOC 2010Z 209DEG 28KT 4477 10960
VorstThe office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 2:26 PM MDT | Special Weather Statement | RIW | Park | 34 min |
| Jun 8, 3:01 PM MDT | Special Weather Statement | RIW | Park | 29 min |
| Jun 8, 4:28 PM MDT | Special Weather Statement | RIW | Big Horn | 32 min |
Nearby
Special Weather Statements in Wyoming, 2021Every special weather statement in 2021
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.