Alert archive / Wyoming / Special Weather Statements in 2021
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Jun 13, 2021, 2:44 PM MDT for Albany County, Wyoming. It was in force for 31 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 13, 2021, 2:44 PM MDT (20:44 UTC)
- Expired
- Jun 13, 2021, 3:15 PM MDT
- In force
- 31 min
- Issued by
- NWS Cheyenne, WY
County Albany County, WY
The radar
The Cheyenne radar (KCYS), 61 km from the middle of the area, began a volume at 20:45 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, 8.7 hours before the alert went out and 255 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
- 827 J/kg
- Mixed-layer CIN
- -387 J/kg
- Mixed-layer LCL
- 1858 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 10 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 13, 2:41 PM MDT, 3 minutes earlier.
Area forecast discussion, Jun 13, 2:41 PM MDT, 3 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, Jun 13, 4:25 AM MDT, 10 hours 19 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 425 AM MDT Sun Jun 13 2021 WYZ104-105-109>115-141030- Ferris/Seminoe/Shirley Mountains-Shirley Basin- Central Carbon County-North Snowy Range Foothills- Southwest Carbon County-Sierra Madre Range- Upper North Platte River Basin-Snowy Range-Laramie Valley- 425 AM MDT Sun Jun 13 2021 This hazardous weather outlook is for portions of south central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Very warm temperatures and dry conditions will maintain elevated fire weather concerns. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY Very warm temperatures and dry conditions will maintain elevated fire weather concerns. .Spotter information statement... Spotter activation will not be needed. NEZ002-003-019>021-054-055-095-096-WYZ101>103-106>108-116>119- 141030- 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- 425 AM MDT Sun Jun 13 2021 This hazardous weather outlook is for portions of panhandle Nebraska...east central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Chances of showers and strong to briefly severe thunderstorm Sunday afternoon through late Sunday night. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY The probability for widespread hazardous weather is low. .Spotter information statement... Spotter activation will not be needed.
In the hours before
Special weather statement, Jun 13, 1:49 PM MDT, 55 minutes before
Special Weather Statement National Weather Service Cheyenne WY 149 PM MDT Sun Jun 13 2021 WYZ116-117-132030- South Laramie Range WY-South Laramie Range Foothills WY- 149 PM MDT Sun Jun 13 2021 ...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL LARAMIE COUNTY UNTIL 230 PM MDT... At 148 PM MDT, Doppler radar was tracking a strong thunderstorm over Horse Creek, or 23 miles east of Laramie, moving northeast at 10 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 west central Laramie County. LAT...LON 4134 10526 4141 10527 4154 10509 4138 10496 TIME...MOT...LOC 1948Z 236DEG 9KT 4141 10516 Rubin
Special weather statement, Jun 13, 2:44 PM MDT, 0 minutes before
Special Weather Statement National Weather Service Cheyenne WY 244 PM MDT Sun Jun 13 2021 WYZ106-116-117-132115- South Laramie Range WY- Central Laramie Range and Southwest Platte County WY- South Laramie Range Foothills WY- 244 PM MDT Sun Jun 13 2021 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL ALBANY... NORTHWESTERN LARAMIE AND SOUTHWESTERN PLATTE COUNTIES UNTIL 315 PM MDT... At 244 PM MDT, Doppler radar was tracking a strong thunderstorm near Iron Mountain, or 28 miles northeast of Laramie, moving north at 20 mph. Penny size hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Iron Mountain. 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 4151 10507 4152 10530 4184 10534 4182 10498 TIME...MOT...LOC 2044Z 183DEG 17KT 4160 10518 Hammer
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 13, 1:49 PM MDT | Special Weather Statement | CYS | Laramie | 41 min |
| Jun 13, 3:12 PM MDT | Special Weather Statement | CYS | Albany | 33 min |
| Jun 13, 3:31 PM MDT | Special Weather Statement | CYS | Platte | 29 min |
| Jun 13, 3:57 PM MDT | Special Weather Statement | CYS | Goshen | 33 min |
| Jun 13, 4:31 PM MDT | Special Weather Statement | CYS | Goshen | 29 min |
| Jun 13, 4:53 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 32 min |
| Jun 13, 4:58 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 47 min |
| Jun 13, 5:13 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 47 min |
| Jun 13, 5:16 PM MDT | Special Weather Statement | CYS | Laramie | 44 min |
| Jun 13, 5:43 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 41 min |
| Jun 13, 5:31 PM MDT | Special Weather Statement | CYS | Dawes | 44 min |
| Jun 13, 5:50 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes, Sioux | 55 min |
| Jun 13, 5:58 PM MDT | Severe Thunderstorm Warning | CYS | Scotts Bluff, Sioux | 47 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.