Alert archive / Wyoming / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 207, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 6, 2019, 5:14 PM MDT for Albany County, Carbon County, Wyoming. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 6, 2019, 5:14 PM MDT (23:14 UTC)
- Expired
- Jul 6, 2019, 6:00 PM MDT
- In force
- 46 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 70.0 mph
Counties Albany County, WY, Carbon County, WY
The radar
The Cheyenne radar (KCYS), 140 km from the middle of the area, began a volume at 23:16 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 6, 12:42 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 11.2 hours before the alert went out and 230 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
- 1291 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 6, 2:56 PM MDT, 2 hours 18 minutes earlier.
Area forecast discussion, Jul 6, 2:56 PM MDT, 2 hours 18 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.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Jul 6, 3:18 PM MDT, 1 hour 56 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 318 PM MDT Sat Jul 6 2019 NEZ002-003-019>021-054-055-095-096-WYZ101>119-072130- Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne- North Sioux-South Sioux-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- 318 PM MDT Sat Jul 6 2019 This hazardous weather outlook is for portions of western Nebraska...east central Wyoming...south central Wyoming and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT A severe thunderstorm watch is in effect for the entire Nebraska Panhandle and Southeast Wyoming, minus Carbon County. Large hail up to the size of baseball, damaging winds of 60 to 70 mph winds, and a tornado or two could be possible. In addition, heavy rainfall leading to localized flash flooding could also occur, especially towards the Wyoming to Nebraska Border and into the southern and central Panhandle. Storms will dissipate and shift east through the mid to late evening hours. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY Strong to severe storms will again be possible for east Wyoming and the Nebraska Panhandle. Pea to quarter size hail, 30 to 50 mph winds, and frequent lightning could be possible during the afternoon and evening hours. .Spotter information statement... Spotter activation will be needed this afternoon and evening and possibly again on Sunday. Allen
In the hours before
Special weather statement, Jul 6, 12:54 PM MDT, 4 hours 20 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.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Special weather statement, Jul 6, 2:52 PM MDT, 2 hours 22 minutes before
Special Weather Statement National Weather Service Cheyenne WY 252 PM MDT Sat Jul 6 2019 WYZ103-105-062115- Shirley Basin-North Laramie Range- 252 PM MDT Sat Jul 6 2019 ...A STRONG THUNDERSTORM WILL AFFECT EASTERN CARBON AND NORTH CENTRAL ALBANY COUNTIES... At 252 PM MDT, a strong thunderstorm was located 7 miles east of Battle Mountain, or 49 miles south of Casper, moving east at 30 mph. Winds in excess of 30 mph and nickel size hail are possible with this storm. This storm will remain over mainly rural areas of eastern Carbon and north central Albany Counties. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. 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 4205 10617 4223 10618 4234 10566 4203 10562 TIME...MOT...LOC 2052Z 266DEG 28KT 4215 10608 Braun
Special weather statement, Jul 6, 2:56 PM MDT, 2 hours 18 minutes before
Special Weather Statement National Weather Service Cheyenne WY 256 PM MDT Sat Jul 6 2019 WYZ104-105-109-110-114-062130- Shirley Basin-North Snowy Range Foothills-Central Carbon County-Ferris/Seminoe/Shirley Mountains-Snowy Range- 256 PM MDT Sat Jul 6 2019 ...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL CARBON AND CENTRAL ALBANY COUNTIES... At 256 PM MDT, a strong thunderstorm was located 7 miles northeast of Hanna, or 41 miles east of Rawlins, moving northeast at 30 mph. Winds in excess of 30 mph and nickel size hail are possible with this storm. Locations impacted include... Hanna, Medicine Bow and Battle Mountain. This includes Interstate 80 in Wyoming between mile markers 246 and 255. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. 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 4166 10663 4199 10664 4225 10622 4191 10592 TIME...MOT...LOC 2056Z 241DEG 27KT 4195 10646 Braun
Special weather statement, Jul 6, 4:05 PM MDT, 1 hour 9 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
405 PM MDT Sat Jul 6 2019
WYZ103>105-109-062230-
Shirley Basin-North Laramie Range-Central Carbon
County-Ferris/Seminoe/Shirley Mountains-
405 PM MDT Sat Jul 6 2019
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN CARBON...NORTH
CENTRAL ALBANY AND SOUTHWESTERN CONVERSE COUNTIES...
At 405 PM MDT, a strong thunderstorm was located 8 miles east of
Battle Mountain, or 52 miles south of Casper, moving east at 30 mph.
Winds in excess of 30 mph and nickel size hail are possible with this
storm.
Locations impacted include...
Battle Mountain, Shirley Basin, Campbell Creek Campground and Little
Medicine School.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
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 4234 10683 4243 10628 4243 10608 4247 10608
4252 10578 4212 10560 4181 10687
TIME...MOT...LOC 2205Z 249DEG 27KT 4210 10605
BraunSpecial weather statement, Jul 6, 4:30 PM MDT, 44 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
430 PM MDT Sat Jul 6 2019
WYZ103>105-109-110-113-114-062300-
Shirley Basin-Upper North Platte River Basin-North Snowy Range
Foothills-North Laramie Range-Central Carbon
County-Ferris/Seminoe/Shirley Mountains-Snowy Range-
430 PM MDT Sat Jul 6 2019
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN CARBON...
NORTH CENTRAL ALBANY AND SOUTHWESTERN CONVERSE COUNTIES...
At 430 PM MDT, radar indicated strong thunderstorms were located
along a line extending from near Shirley Basin to 6 miles southwest
of Hanna. Movement was east at 20 mph.
Winds in excess of 30 mph and penny size hail are possible with these
storms.
Locations impacted include...
Hanna, Medicine Bow, Elk Mountain, Battle Mountain, Shirley Basin and
Little Medicine School.
This includes Interstate 80 in Wyoming between mile markers 236 and
262.
Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
LAT...LON 4178 10690 4243 10644 4244 10611 4240 10581
4155 10646
TIME...MOT...LOC 2230Z 289DEG 18KT 4237 10625 4183 10666
BraunSpecial weather statement, Jul 6, 4:39 PM MDT, 35 minutes before
Special Weather Statement National Weather Service Cheyenne WY 439 PM MDT Sat Jul 6 2019 WYZ103-105-106-115-062315- Shirley Basin-Central Laramie Range and Southwest Platte County-North Laramie Range-Laramie Valley- 439 PM MDT Sat Jul 6 2019 ...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN CARBON AND NORTHEASTERN ALBANY COUNTIES... At 439 PM MDT, a strong thunderstorm was located 14 miles southeast of Battle Mountain, or 51 miles west of Wheatland, moving southeast at 25 mph. Winds in excess of 30 mph and half inch hail are possible with this storm. Locations impacted include... Wheatland Reservoir 3. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. 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 4201 10609 4214 10598 4203 10551 4176 10572 TIME...MOT...LOC 2239Z 300DEG 23KT 4202 10595 Braun
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 6:02 PM MDT | Special Weather Statement | CYS | Goshen | 28 min |
| Jul 5, 6:26 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 17 min |
| Jul 5, 6:46 PM MDT | Special Weather Statement | CYS | Goshen | 44 min |
| Jul 5, 7:28 PM MDT | Special Weather Statement | CYS | Laramie | 47 min |
| Jul 5, 7:58 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 47 min |
| Jul 5, 8:19 PM MDT | Special Weather Statement | CYS | Laramie | 41 min |
| Jul 5, 9:25 PM MDT | Special Weather Statement | CYS | Laramie | 50 min |
| Jul 5, 9:53 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 52 min |
| Jul 5, 10:39 PM MDT | Special Weather Statement | CYS | Laramie | 51 min |
| Jul 6, 12:54 PM MDT | Special Weather Statement | CYS | 36 min | |
| Jul 6, 2:52 PM MDT | Special Weather Statement | CYS | 23 min | |
| Jul 6, 2:56 PM MDT | Special Weather Statement | CYS | 34 min | |
| Jul 6, 4:05 PM MDT | Special Weather Statement | CYS | 25 min | |
| Jul 6, 4:30 PM MDT | Special Weather Statement | CYS | 30 min | |
| Jul 6, 4:39 PM MDT | Special Weather Statement | CYS | Albany | 36 min |
| Jul 6, 4:54 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon | 37 min |
| Jul 6, 5:41 PM MDT | Special Weather Statement | CYS | Platte | 34 min |
| Jul 6, 5:58 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 47 min |
| Jul 5, 6:01 PM MDT | Special Weather Statement | CYS | Dawes | 59 min |
| Jul 5, 7:14 PM MDT | Special Weather Statement | CYS | Box Butte | 46 min |
| Jul 5, 8:42 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 48 min |
| Jul 5, 9:01 PM MDT | Special Weather Statement | CYS | Kimball | 44 min |
| Jul 5, 10:30 PM MDT | Special Weather Statement | CYS | Cheyenne | 45 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 2019Every severe thunderstorm warning in 2019
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.