Alert archive / South Dakota / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 263, NWS Rapid City, SD
NWS Rapid City, SD issued this severe thunderstorm warning at Jul 28, 2011, 3:49 PM MDT for Butte County, Lawrence County, South Dakota. It was in force for 24 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 28, 2011, 3:49 PM MDT (21:49 UTC)
- Expired
- Jul 28, 2011, 4:13 PM MDT
- In force
- 24 min
- Issued by
- NWS Rapid City, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Butte County, SD, Lawrence County, SD
The radar
The Rapid City radar (KUDX), 86 km from the middle of the area, began a volume at 21:52 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 |
|---|---|---|---|
| Mar 3, 10:24 PM MST | Severe Thunderstorm Watch | SPC | 157 days |
| Jul 28, 2:31 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 9.8 hours before the alert went out and 330 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
- 135 J/kg
- Mixed-layer CIN
- -110 J/kg
- Mixed-layer LCL
- 1472 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 43 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 Rapid City, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 28, 2:42 PM MDT, 1 hour 7 minutes earlier.
Area forecast discussion, Jul 28, 2:42 PM MDT, 1 hour 7 minutes before
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY NATIONAL WEATHER SERVICE RAPID CITY SD 242 PM MDT THU JUL 28 2011 .DISCUSSION...CURRENT SURFACE MAP SHOWS WEAK LOW ACROSS EASTERN COLORADO WITH INVERTED TROF INTO NORTHEAST WYOMING. THUNDERSTORMS DEVELOPING FROM THE BLACK HILLS INTO NORTHWEST SOUTH DAKOTA. ANALYSIS SHOWS MLCAPE OF 1000-1500J/KG WITH MINIMAL CAP. SUFFICIENT SHEAR FOR SUPERCELLS. THUNDERSTORM THREAT WILL DIMINISH THIS EVENING AS STORMS MOVE EAST OF THE FORECAST AREA. OVERNIGHT...LOW LEVEL JET DEVELOPS ACROSS THE NEBRASKA PANHANDLE WITH 850-700MB FOCUSED ACROSS THE BLACK HILLS AREA. FORECAST SOUNDINGS SHOW 200-400J/KG CAPE AVAILABLE FOR UPDRAFTS INITIATED FROM AROUND 700MB. WILL ADD SOME ISOLATED THUNDERSTORMS FOR LATE TONIGHT. ON FRIDAY...SURFACE TROF REMAINS ACROSS EASTERN WYOMING WITH SOUTHEASTERLY FLOW ACROSS WESTERN SOUTH DAKOTA. FORECAST SOUNDINGS SHOW 2000-3000J/KG CAPE ACROSS THE BLACK HILLS INTO SOUTHWEST SOUTH DAKOTA. SUFFICIENT SHEAR FOR ANOTHER ROUND OF SEVERE THUNDERSTORMS. UPPER RIDGE BEGINS BUILDING ACROSS THE NORTHERN PLAINS SATURDAY...WITH A WEAK COLD FRONT DROPPING THROUGH THE AREA. WILL BE UNSTABLE...WITH MLCAPE AROUND 2000J/KG. HOWEVER...STRONG CAP IN PLACE. WITH LACK OF FORCING...WITH KEEP FORECAST DRY FOR NOW. EXTENDED...UPPER RIDGE WILL ANCHOR OVER THE SOUTHERN PLAINS PUTTING NERN WY AND WRN SD IN A MOIST MONSOONAL SW FLOW ALOFT. THIS WILL BRING A DAILY CHANCE OF THUNDERSTORMS TO THE REGION THRU THE EXTENDED PERIOD. TEMPERATURES WILL BE ABOVE NORMAL ON SUNDAY AND MONDAY AND NEAR NORMAL THRU THE REST OF NEXT WEEK. && .AVIATION...SCATTERED THUNDERSTORMS WILL CONTINUE ACROSS THE AREA THROUGH THIS EVENING...WITH STRONG TO SEVERE STORMS POSSIBLE OVER PARTS OF WESTERN SOUTH DAKOTA. LCL IFR/MVFR CONDITIONS CAN BE EXPECTED IN AND NEAR ANY THUNDERSTORMS. OTHERWISE...VFR CONDITIONS EXPECTED THROUGH FRIDAY MORNING. && .UNR WATCHES/WARNINGS/ADVISORIES... SD...NONE. WY...NONE. &&
Hazardous weather outlook, Jul 28, 2:03 PM MDT, 1 hour 46 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RAPID CITY SD 203 PM MDT THU JUL 28 2011 SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058- 071-291300- BENNETT-BUTTE-CENTRAL BLACK HILLS-CUSTER CO PLAINS-FALL RIVER-HAAKON- HARDING-HERMOSA FOOT HILLS-JACKSON-MELLETTE-NORTHEASTERN CROOK- NORTHERN BLACK HILLS-NORTHERN CAMPBELL-NORTHERN FOOT HILLS- NORTHERN MEADE CO PLAINS-PENNINGTON CO PLAINS-PERKINS-RAPID CITY- SHANNON-SOUTHERN BLACK HILLS-SOUTHERN CAMPBELL-SOUTHERN FOOT HILLS- SOUTHERN MEADE CO PLAINS-STURGIS/PIEDMONT FOOT HILLS-TODD-TRIPP- WESTERN CROOK-WESTON-WYOMING BLACK HILLS-ZIEBACH- 203 PM MDT (303 PM CDT) THU JUL 28 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN SOUTH DAKOTA AND NORTHEASTERN WYOMING. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS WILL CONTINUE ACROSS PORTIONS OF NORTHEAST WYOMING AND WESTERN SOUTH DAKOTA THROUGH THIS EVENING. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE BLACK HILLS INTO NORTHWEST SOUTH DAKOTA...WITH LARGE HAIL AND DAMAGING WIND GUSTS POSSIBLE. ADDITIONAL ISOLATED THUNDERSTORMS ARE POSSIBLE AFTER MIDNIGHT AROUND THE BLACK HILLS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY SCATTERED THUNDERSTORMS ARE POSSIBLE FRIDAY AFTERNOON AND EVENING. THERE IS IS SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF NORTHEAST WYOMING AND WESTERN SOUTH DAKOTA. .SPOTTER INFORMATION STATEMENT... SPOTTER MAY BE NEEDED TODAY.
In the hours before
Local storm report, Jul 28, 3:15 PM MDT, 34 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 28, 3:30 PM MDT, 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RAPID CITY SD 330 PM MDT THU JUL 28 2011 SDZ012-025-282215- BUTTE SD-NORTHERN FOOT HILLS SD- 330 PM MDT THU JUL 28 2011 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN LAWRENCE AND SOUTHWESTERN BUTTE COUNTIES UNTIL 415 PM MDT... AT 329 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR DOWNTOWN BELLE FOURCHE...MOVING SOUTHEAST AT 15 MPH. HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... DOWNTOWN BELLE FOURCHE... DOWNTOWN SPEARFISH... FRUITDALE... THIS INCLUDES INTERSTATE 90 BETWEEN SOUTH DAKOTA MILE MARKERS 4 AND 12... CARSTENS
Local storm report, Jul 28, 3:34 PM MDT, 15 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>Local storm report, Jul 28, 3:42 PM MDT, 7 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>Local storm report, Jul 28, 3:44 PM MDT, 5 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>Local storm report, Jul 28, 3:46 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.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>The office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 6:06 PM MDT | Severe Thunderstorm Warning | UNR | Meade, Pennington | 54 min |
| Jul 27, 6:14 PM MDT | Areal Flood Advisory | UNR | Meade, Pennington | 3 hr |
| Jul 27, 6:27 PM MDT | Severe Thunderstorm Warning | UNR | Custer, Fall River, Meade, Pennington | 63 min |
| Jul 27, 7:30 PM MDT | Severe Thunderstorm Warning | UNR | Bennett, Haakon, Jackson, Meade, Pennington, Ziebach | 60 min |
| Jul 27, 8:06 PM MDT | Severe Thunderstorm Warning | UNR | Bennett, Jackson | 54 min |
| Jul 27, 8:28 PM MDT | Severe Thunderstorm Warning | UNR | Haakon, Ziebach | 62 min |
| Jul 27, 8:55 PM MDT | Severe Thunderstorm Warning | UNR | Jackson, Mellette | 65 min |
| Jul 27, 9:27 PM MDT | Severe Thunderstorm Warning | UNR | Mellette, Todd | 63 min |
| Jul 27, 9:59 PM MDT | Severe Thunderstorm Warning | UNR | Tripp | 61 min |
| Jul 28, 2:07 PM MDT | Severe Thunderstorm Warning | UNR | Pennington | 53 min |
| Jul 28, 2:13 PM MDT | Severe Thunderstorm Warning | UNR | Lawrence, Pennington | 42 min |
| Jul 28, 2:18 PM MDT | Severe Thunderstorm Warning | UNR | Harding | 57 min |
| Jul 28, 2:24 PM MDT | Severe Thunderstorm Warning | UNR | Perkins | 66 min |
| Jul 28, 2:56 PM MDT | Severe Thunderstorm Warning | UNR | Custer, Pennington | 64 min |
| Jul 28, 3:05 PM MDT | Severe Thunderstorm Warning | UNR | Perkins, Ziebach | 55 min |
| Jul 28, 3:09 PM MDT | Severe Thunderstorm Warning | UNR | Harding | 66 min |
| Jul 28, 3:27 PM MDT | Severe Thunderstorm Warning | UNR | Butte, Harding | 63 min |
| Jul 28, 3:45 PM MDT | Severe Thunderstorm Warning | UNR | Harding, Perkins | 60 min |
| Jul 28, 3:58 PM MDT | Severe Thunderstorm Warning | UNR | Perkins, Ziebach | 62 min |
| Jul 28, 4:29 PM MDT | Severe Thunderstorm Warning | UNR | Ziebach | 61 min |
| Jul 28, 4:32 PM MDT | Severe Thunderstorm Warning | UNR | Butte, Harding | 58 min |
| Jul 28, 4:58 PM MDT | Severe Thunderstorm Warning | UNR | Perkins, Ziebach | 62 min |
| Jul 27, 8:38 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 82 min |
| Jul 28, 2:16 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 59 min |
| Jul 28, 4:09 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 51 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2011Every severe thunderstorm warning in 2011
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.