Alert archive / Wyoming / Special Weather Statements in 2021
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Jun 24, 2021, 4:56 PM MDT for Niobrara County, Wyoming. It was in force for 34 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 24, 2021, 4:56 PM MDT (22:56 UTC)
- Expired
- Jun 24, 2021, 5:30 PM MDT
- In force
- 34 min
- Issued by
- NWS Cheyenne, WY
County Niobrara County, WY
The radar
The Rapid City radar (KUDX), 201 km from the middle of the area, began a volume at 22:58 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
Rapid City, SD (KUNR), launched 12:00Z, 10.9 hours before the alert went out and 194 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
- 8 J/kg
- Mixed-layer CIN
- -490 J/kg
- Mixed-layer LCL
- 1569 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -60 m²/s²
- 0-3 km storm-relative helicity
- 63 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 Cheyenne, WY wrote its last area forecast discussion before this special weather statement went out at Jun 24, 2:21 PM MDT, 2 hours 35 minutes earlier.
Area forecast discussion, Jun 24, 2:21 PM MDT, 2 hours 35 minutes before
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<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 24, 5:15 AM MDT, 11 hours 41 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 515 AM MDT Thu Jun 24 2021 NEZ002-003-019>021-054-055-095-096-WYZ101>103-106>108-116>119- 251115- Dawes County-Box Butte County-Scotts Bluff County-Banner County- Morrill County-Kimball County-Cheyenne County- Northern Sioux County-Southern Sioux County- Converse County Lower Elevations-Niobrara County- North Laramie Range- Central Laramie Range and Southwest Platte County- East Platte County-Goshen County-South Laramie Range- South Laramie Range Foothills-Central Laramie County- East Laramie County- 515 AM MDT Thu Jun 24 2021 This hazardous weather outlook is for portions of panhandle Nebraska...east central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Showers and thunderstorms are expected to develop along and east of the Laramie Range by early to mid afternoon, becoming numerous in coverage during the late afternoon and evening. A few strong to severe storms are possible. The main hazards will be strong wind gusts up to 60 MPH and hail up to the size of quarters. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY Numerous showers and storms are expected again on Friday. .Spotter information statement... Spotter activation is not anticipated. However, spotters are encouraged to report significant weather to the National Weather Service in Cheyenne. WYZ104-105-109>113-115-251115- Ferris/Seminoe/Shirley Mountains-Shirley Basin- Central Carbon County-North Snowy Range Foothills- Southwest Carbon County-Sierra Madre Range- Upper North Platte River Basin-Laramie Valley- 515 AM MDT Thu Jun 24 2021 This hazardous weather outlook is for portions of south central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Showers and thunderstorms are expected to develop by early to mid afternoon, likely continuing through the evening. Some storms may produce strong wind gusts up to 60 MPH. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY Numerous showers and storms are expected again on Friday. .Spotter information statement... Spotter activation is not anticipated. However, spotters are encouraged to report significant weather to the National Weather Service in Cheyenne. WYZ114-251115- Snowy Range- 515 AM MDT Thu Jun 24 2021 This hazardous weather outlook is for portions of south central Wyoming. .DAY ONE...TODAY AND TONIGHT Multiple rounds of showers and thunderstorms are expected in the vicinity of the Snowy Range today and tonight. Some storms could produce locally heavy rainfall, resulting in a conditional threat for flash flooding and debris flows over the Mullen Burn Scar. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY Numerous showers and storms are expected again on Friday. .Spotter information statement... Spotter activation is not anticipated. However, spotters are encouraged to report significant weather to the National Weather Service in Cheyenne.
In the hours before
Special weather statement, Jun 24, 2:56 PM MDT, 2 hours before
Special Weather Statement National Weather Service Cheyenne WY 256 PM MDT Thu Jun 24 2021 WYZ103-105-242130- Shirley Basin WY-North Laramie Range WY- 256 PM MDT Thu Jun 24 2021 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL ALBANY COUNTY UNTIL 330 PM MDT... At 255 PM MDT, Doppler radar was tracking a thunderstorm 12 miles west of Garrett, or 44 miles west of Wheatland. This storm was nearly stationary. 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 north central Albany County. PRECAUTIONARY/PREPAREDNESS ACTIONS... Persons in campgrounds should consider seeking sturdy shelter until this storm passes. && LAT...LON 4196 10578 4204 10590 4219 10577 4206 10560 TIME...MOT...LOC 2055Z 227DEG 2KT 4205 10582 Brothers
Special weather statement, Jun 24, 3:33 PM MDT, 1 hour 23 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
333 PM MDT Thu Jun 24 2021
WYZ116-117-242200-
South Laramie Range WY-South Laramie Range Foothills WY-
333 PM MDT Thu Jun 24 2021
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN ALBANY AND
SOUTHWESTERN LARAMIE COUNTIES UNTIL 400 PM MDT...
At 333 PM MDT, Doppler radar was tracking a strong thunderstorm near
Crystal Lake Campground, or 19 miles west of Cheyenne, moving
northeast at 10 mph.
Half inch hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Crystal Lake Campground and Buford.
This includes Interstate 80 in Wyoming between mile markers 334 and
352.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 4102 10520 4106 10537 4113 10534 4119 10500
4102 10496
TIME...MOT...LOC 2133Z 245DEG 9KT 4108 10515
BrothersSpecial weather statement, Jun 24, 4:56 PM MDT, 0 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
456 PM MDT Thu Jun 24 2021
WYZ101-102-242330-
Converse County Lower Elevations WY-Niobrara County WY-
456 PM MDT Thu Jun 24 2021
...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL NIOBRARA AND
NORTHEASTERN CONVERSE COUNTIES UNTIL 530 PM MDT...
At 455 PM MDT, Doppler radar was tracking a strong thunderstorm 12
miles north of Manning Ranch, or 36 miles northeast of Douglas,
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 west central
Niobrara and northeastern Converse Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4309 10500 4314 10506 4325 10509 4333 10487
4320 10469 4308 10490
TIME...MOT...LOC 2255Z 234DEG 21KT 4317 10493
MokryThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 12:40 PM MDT | Areal Flood Advisory | CYS | Carbon | 65 min |
| Jun 24, 2:56 PM MDT | Special Weather Statement | CYS | Albany | 34 min |
| Jun 24, 3:33 PM MDT | Special Weather Statement | CYS | Laramie | 27 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.