Alert archive / Wyoming / Special Weather Statements in 2021
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Jun 6, 2021, 3:24 PM MDT for Laramie County, Wyoming. It was in force for 36 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 6, 2021, 3:24 PM MDT (21:24 UTC)
- Expired
- Jun 6, 2021, 4:00 PM MDT
- In force
- 36 min
- Issued by
- NWS Cheyenne, WY
County Laramie County, WY
The radar
The Cheyenne radar (KCYS), 15 km from the middle of the area, began a volume at 21:27 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
Denver, CO (KDNR), launched 12:00Z, 9.4 hours before the alert went out and 184 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
- 2939 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 76 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 6, 2:14 PM MDT, 1 hour 10 minutes earlier.
Area forecast discussion, Jun 6, 2:14 PM MDT, 1 hour 10 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.
</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, Jun 6, 4:59 AM MDT, 10 hours 25 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 459 AM MDT Sun Jun 6 2021 WYZ101>119-071100- Converse County Lower Elevations-Niobrara County- North Laramie Range-Ferris/Seminoe/Shirley Mountains- Shirley Basin-Central Laramie Range and Southwest Platte County- East Platte County-Goshen 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- 459 AM MDT Sun Jun 6 2021 This hazardous weather outlook is for east central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Isolated thunderstorms are forecast late this afternoon into this evening. Frequent lightning and brief gusty winds may accompany these storms. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY Widely scattered thunderstorms are possible Monday and Tuesday afternoon. The potential for severe weather is increasing Tuesday afternoon, mainly east of the Interstate 25 corridor. .Spotter information statement... Spotter activation will not be needed. NEZ002-003-019>021-054-055-095-096-071100- Dawes County-Box Butte County-Scotts Bluff County-Banner County- Morrill County-Kimball County-Cheyenne County- Northern Sioux County-Southern Sioux County- 459 AM MDT Sun Jun 6 2021 This hazardous weather outlook is for portions of panhandle Nebraska. .DAY ONE...TODAY AND TONIGHT A few thunderstorms are forecast to develop this evening across western Nebraska. Frequent lightning and brief gusty winds may accompany these storms. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY Widely scattered thunderstorms are possible Monday and Tuesday afternoon. The potential for severe weather is increasing Tuesday afternoon, especially across the northern Nebraska Panhandle. .Spotter information statement... Spotter activation will not be needed.
In the hours before
Special weather statement, Jun 6, 3:24 PM MDT, 0 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
324 PM MDT Sun Jun 6 2021
WYZ118-062200-
Central Laramie County-
324 PM MDT Sun Jun 6 2021
...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL LARAMIE COUNTY...
At 324 PM MDT, a strong thunderstorm was located 8 miles east of
Cheyenne, moving northeast at 10 mph.
Winds in excess of 40 mph and half inch hail are possible with this
storm.
This storm will remain over mainly rural areas of south central
Laramie County.
This includes Interstate 80 in Wyoming between mile markers 370 and
374.
LAT...LON 4110 10464 4111 10466 4113 10468 4118 10465
4118 10458 4116 10457 4111 10460
TIME...MOT...LOC 2124Z 205DEG 7KT 4113 10464
MokryThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 5, 7:16 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara, Platte | 28 min |
| Jun 5, 7:53 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara | 22 min |
| Jun 6, 5:21 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 39 min |
| Jun 6, 5:32 PM MDT | Severe Thunderstorm Warning | CYS | Laramie, Platte | 43 min |
| Jun 6, 5:02 PM MDT | Special Weather Statement | CYS | Kimball | 43 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.