Alert archive / Wyoming / Special Weather Statements in 2021
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at May 28, 2021, 6:58 PM MDT for Niobrara County, Wyoming. It was in force for 47 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
- May 28, 2021, 6:58 PM MDT (00:58 UTC)
- Expired
- May 28, 2021, 7:45 PM MDT
- In force
- 47 min
- Issued by
- NWS Cheyenne, WY
County Niobrara County, WY
The radar
The Rapid City radar (KUDX), 194 km from the middle of the area, began a volume at 01:01 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 00:00Z, 1.0 hours before the alert went out and 187 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
- 1505 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 132 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 May 28, 5:29 PM MDT, 1 hour 29 minutes earlier.
Area forecast discussion, May 28, 5:29 PM MDT, 1 hour 29 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.
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</html>Hazardous weather outlook, May 28, 6:31 AM MDT, 12 hours 27 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 631 AM MDT Fri May 28 2021 WYZ101-103>107-109>119-291245- Converse County Lower Elevations-North Laramie Range- Ferris/Seminoe/Shirley Mountains-Shirley Basin- Central Laramie Range and Southwest Platte County- East Platte County-Central Carbon County- North Snowy Range Foothills-Southwest Carbon County- Sierra Madre Range-Upper North Platte River Basin-Snowy Range- Laramie Valley-South Laramie Range-South Laramie Range Foothills- Central Laramie County-East Laramie County- 631 AM MDT Fri May 28 2021 This hazardous weather outlook is for portions of east central Wyoming...south central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY Showers and scattered thunderstorms are forecast this weekend into early next week. Severe weather is not expected. Locally heavy rainfall will be possible Sunday and may increase the risk for flooding over the burn scars in southeast Carbon and southwest Albany counties. .Spotter information statement... Spotter activation will not be needed. NEZ002-003-019>021-054-055-095-096-WYZ102-108-291245- Dawes County-Box Butte County-Scotts Bluff County-Banner County- Morrill County-Kimball County-Cheyenne County- Northern Sioux County-Southern Sioux County-Niobrara County- Goshen County- 631 AM MDT Fri May 28 2021 This hazardous weather outlook is for portions of panhandle Nebraska...east central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Isolated to widely scattered thunderstorms are possible this evening through the overnight hours. Thunderstorms are not expected to become severe. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY Showers and scattered thunderstorms are forecast this weekend into early next week. Severe weather is not expected. .Spotter information statement... Spotter activation will not be needed.
In the hours before
Special weather statement, May 28, 6:58 PM MDT, 0 minutes before
Special Weather Statement National Weather Service Cheyenne WY 658 PM MDT Fri May 28 2021 WYZ102-290145- Niobrara County- 658 PM MDT Fri May 28 2021 ...A STRONG THUNDERSTORM WILL AFFECT WEST CENTRAL NIOBRARA COUNTY... At 658 PM MDT, a strong thunderstorm was located near Lance Creek, or 18 miles northwest of Lusk, moving east at 20 mph. Winds in excess of 40 mph and penny size hail are possible with this storm. This storm will be near... Lance Creek around 710 PM MDT. If outdoors, consider seeking shelter inside a building. 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 4290 10477 4304 10479 4313 10443 4288 10438 TIME...MOT...LOC 0058Z 264DEG 16KT 4297 10468 Jamski
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 8:44 PM MDT | Special Weather Statement | CYS | Niobrara | 46 min |
| May 28, 9:05 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 40 min |
| May 28, 9:15 PM MDT | Areal Flood Advisory | CYS | Niobrara | 72 min |
| May 28, 9:21 PM MDT | Special Weather Statement | CYS | Laramie | 24 min |
| May 29, 1:37 PM MDT | Special Weather Statement | CYS | Laramie | 38 min |
| May 29, 2:06 PM MDT | Special Weather Statement | CYS | Laramie | 24 min |
| May 29, 2:17 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 28 min |
| May 29, 5:55 PM MDT | Special Weather Statement | CYS | Platte | 35 min |
| May 28, 9:45 PM MDT | Special Weather Statement | CYS | Sioux | 45 min |
| May 28, 10:12 PM MDT | Special Weather Statement | CYS | Sioux | 33 min |
| May 28, 10:25 PM MDT | Special Weather Statement | CYS | Sioux | 35 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.