Alert archive / Wyoming / Special Weather Statements in 2021
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Jul 5, 2021, 2:00 PM MDT for Albany County, Wyoming. It was in force for 30 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
- Jul 5, 2021, 2:00 PM MDT (20:00 UTC)
- Expired
- Jul 5, 2021, 2:30 PM MDT
- In force
- 30 min
- Issued by
- NWS Cheyenne, WY
County Albany County, WY
The radar
The Cheyenne radar (KCYS), 104 km from the middle of the area, began a volume at 20:00 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
Riverton, WY (KRIW), launched 12:00Z, 8.0 hours before the alert went out and 278 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
- 24 J/kg
- Mixed-layer CIN
- -300 J/kg
- Mixed-layer LCL
- 1993 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 54 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 Jul 5, 11:52 AM MDT, 2 hours 8 minutes earlier.
Area forecast discussion, Jul 5, 11:52 AM MDT, 2 hours 8 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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</section>
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</html>Hazardous weather outlook, Jul 5, 4:16 AM MDT, 9 hours 44 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 416 AM MDT Mon Jul 5 2021 WYZ101>119-061030- 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- 416 AM MDT Mon Jul 5 2021 This hazardous weather outlook is for portions of east central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Showers and thunderstorms will develop around noon today, and then increase in coverage and intensity for the rest of the afternoon and through the evening hours. There is a marginal risk for severe thunderstorms, mainly along and east of the Interstate 25 corridor where large hail and strong winds are possible. Several lines of thunderstorms are expected this afternoon through tonight which may result in an isolated flash flooding risk. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY Showers and thunderstorms will diminish by mid Tuesday afternoon as a drier airmass moves into the region. The probability for hazardous weather is low for the rest of the week. .Spotter information statement... Spotter activation may be required today. NEZ002-003-019>021-054-055-095-096-061030- Dawes County-Box Butte County-Scotts Bluff County-Banner County- Morrill County-Kimball County-Cheyenne County- Northern Sioux County-Southern Sioux County- 416 AM MDT Mon Jul 5 2021 This hazardous weather outlook is for portions of panhandle Nebraska. .DAY ONE...TODAY AND TONIGHT Showers and thunderstorms will move east across western Nebraska this evening and continue through most of tonight. There is a marginal risk for severe thunderstorms, mainly the northern and central panhandle where large hail and strong winds are possible. Several lines of thunderstorms are expected through tonight which may result in an isolated flash flooding risk. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY Showers and thunderstorms will diminish by mid Tuesday afternoon as a drier airmass moves into the region. The probability for hazardous weather is low for the rest of the week. .Spotter information statement... Spotter activation may be required today.
In the hours before
Special weather statement, Jul 5, 2:00 PM MDT, 0 minutes before
Special Weather Statement National Weather Service Cheyenne WY 200 PM MDT Mon Jul 5 2021 WYZ110-114-115-052030- North Snowy Range Foothills WY-Laramie Valley WY-Snowy Range WY- 200 PM MDT Mon Jul 5 2021 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN ALBANY COUNTY UNTIL 230 PM MDT... At 159 PM MDT, Doppler radar was tracking a strong thunderstorm over Centennial, or 24 miles west of Laramie, moving east at 5 mph. Half inch hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Centennial. 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 4124 10613 4137 10610 4138 10590 4120 10594 TIME...MOT...LOC 1959Z 283DEG 6KT 4130 10606 Brothers
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 2:31 PM MDT | Special Weather Statement | CYS | Converse | 44 min |
| Jul 5, 2:32 PM MDT | Areal Flood Advisory | CYS | Albany, Converse, Platte | 118 min |
| Jul 5, 2:44 PM MDT | Special Weather Statement | CYS | Albany | 31 min |
| Jul 5, 2:46 PM MDT | Special Weather Statement | CYS | Niobrara | 44 min |
| Jul 5, 3:00 PM MDT | Special Weather Statement | CYS | Platte | 30 min |
| Jul 5, 3:11 PM MDT | Special Weather Statement | CYS | Platte | 34 min |
| Jul 5, 3:21 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie, Platte | 39 min |
| Jul 5, 3:36 PM MDT | Special Weather Statement | CYS | Platte | 39 min |
| Jul 5, 3:57 PM MDT | Areal Flood Advisory | CYS | Albany, Laramie | 2 hr |
| Jul 5, 4:04 PM MDT | Special Weather Statement | CYS | Platte | 26 min |
| Jul 5, 4:52 PM MDT | Special Weather Statement | CYS | Carbon | 38 min |
| Jul 5, 5:06 PM MDT | Special Weather Statement | CYS | Goshen | 24 min |
| Jul 5, 5:58 PM MDT | Special Weather Statement | CYS | Albany | 47 min |
| Jul 5, 4:56 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 34 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.