Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 93, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Apr 8, 2015, 6:42 PM CDT for Dewey County, Major County, Woodward County, Oklahoma. It was in force for 29 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
- Apr 8, 2015, 6:42 PM CDT (23:42 UTC)
- Expired
- Apr 8, 2015, 7:11 PM CDT
- In force
- 29 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 2.0 in
- Wind
- 60.0 mph
Counties Dewey County, OK, Major County, OK, Woodward County, OK
The radar
The Vance AFB radar (KVNX), 91 km from the middle of the area, began a volume at 23:41 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 |
|---|---|---|---|
| Apr 8, 3:37 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 11.7 hours before the alert went out and 179 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
- 1989 J/kg
- Mixed-layer CIN
- -278 J/kg
- Mixed-layer LCL
- 931 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 328 m²/s²
- 0-3 km storm-relative helicity
- 298 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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 8, 6:20 PM CDT, 22 minutes earlier.
Area forecast discussion, Apr 8, 6:20 PM CDT, 22 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, Apr 8, 12:04 PM CDT, 6 hours 38 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NORMAN OK 1204 PM CDT WED APR 8 2015 OKZ004>048-050>052-TXZ083>090-091015- HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD- NOBLE-ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE- BECKHAM-WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN- CLEVELAND-POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON- TILLMAN-COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON- JEFFERSON-CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN- FOARD-WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER-CLAY- 1204 PM CDT WED APR 8 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN... WESTERN...CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT... .THUNDERSTORMS... THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING ACROSS A SMALL PART OF NORTH CENTRAL OKLAHOMA. THE REST OF NORTHERN...WESTERN AND CENTRAL OKLAHOMA AND NORTH TEXAS ARE IN AN ENHANCED TO SLIGHT RISK AREA. TORNADOES ARE POSSIBLE. LOCATION... AREAS ALONG AND EAST OF WAKITA AND ENID AND NORTH OF ENID AND RED ROCK ARE IN THE MODERATE RISK AREA. AREAS EAST OF WOODWARD AND CLINTON...AND GENERALLY NORTH OF CLINTON AND OKLAHOMA CITY ARE IN THE ENHANCED RISK. THE SLIGHT RISK COVERS NORTH TEXAS AND THE REST OF CENTRAL AND WESTERN OKLAHOMA TO THE NORTHWEST OF HOLDENVILLE AND ARDMORE. TIMING... 4 PM TO MIDNIGHT IMPACTS... HAIL TO TENNIS BALL SIZE...WIND GUSTS TO 70 MPH AND A FEW TORNADOES. DISCUSSION... SCATTERED SHOWERS AND A FEW THUNDERSTORMS WILL MOVE ACROSS CENTRAL AND EASTERN OKLAHOMA DURING THE EARLY TO MID AFTERNOON. SMALL HAIL AND OCCASIONAL LIGHTNING ARE POSSIBLE WITH SOME OF THE STORMS. BY LATE AFTERNOON...ISOLATED THUNDERSTORMS WILL FORM ALONG A DRYLINE IN FAR WESTERN OKLAHOMA AND ADJACENT AREAS OF NORTH TEXAS. OTHER STORMS ARE EXPECTED TO DEVELOP IN FAR NORTHERN OKLAHOMA NEAR A WARM FRONT. STORMS THAT DEVELOP WILL LIKELY BECOME SEVERE AND MOVE NORTHEAST AROUND 25 MPH. MODERATE TO STRONG CAPE AND INCREASING DEEP LAYER SHEAR WILL SUPPORT THE DEVELOPMENT OF VERY LARGE HAIL AND DAMAGING WINDS. BY EARLY EVENING... LOW LEVEL WIND SHEAR WILL INCREASE WITH THE DEVELOPMENT OF A LOW LEVEL JET. THIS WILL INCREASE THE CHANCE OF TORNADOES...ESPECIALLY IN NORTH CENTRAL OKLAHOMA. STORMS THAT FORM IN WESTERN OKLAHOMA WILL APPROACH CENTRAL AND SOUTHERN OKLAHOMA AFTER 8 PM. BY MIDNIGHT...STORM INTENSITY WILL GRADUALLY DECREASE AND STORMS SHOULD MOVE NORTH AND EAST OF THE AREA. .SPOTTER AND EMERGENCY MANAGEMENT STATEMENT... STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS NORTHERN AND CENTRAL OKLAHOMA SHOULD PREPARE FOR SEVERE WEATHER OPERATIONS LATE THIS AFTERNOON AND EVENING. .FIRE WEATHER... THERE IS A RED FLAG WARNING FOR THIS AFTERNOON AND EARLY EVENING IN WESTERN OKLAHOMA. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... A COLD FRONT WILL MOVE INTO SOUTHEAST OKLAHOMA THURSDAY AFTERNOON WITH FAVORABLE MOISTURE AND UPPER LEVEL SUPPORT FOR THUNDERSTORMS. THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS EAST OF DURANT AND ATOKA. A CHANCE OF THUNDERSTORMS CONTINUES UNTIL TUESDAY. GET GRAPHICS AND MORE DETAILS AT WEATHER.GOV/NORMAN...AND FOLLOW OUR WEATHER FORECAST OFFICE ON TWITTER AND FACEBOOK.
In the hours before
Special weather statement, Apr 8, 5:12 PM CDT, 1 hour 30 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, Apr 8, 5:39 PM CDT, 1 hour 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>Special weather statement, Apr 8, 6:00 PM CDT, 42 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, Apr 8, 6:22 PM CDT, 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, Apr 8, 6:41 PM CDT, 1 minute 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, Apr 8, 6:42 PM CDT, 0 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 Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 10:53 AM CDT | Special Weather Statement | OUN | Greer, Jackson, Kiowa, Tillman, Washita | 22 min |
| Apr 8, 11:16 AM CDT | Special Weather Statement | OUN | Blaine, Caddo, Comanche, Cotton, Custer, Greer and 4 more | 59 min |
| Apr 8, 1:47 PM CDT | Special Weather Statement | OUN | Kay | 13 min |
| Apr 8, 3:51 PM CDT | Special Weather Statement | OUN | Roger Mills | 39 min |
| Apr 8, 4:27 PM CDT | Special Weather Statement | OUN | Woods | 33 min |
| Apr 8, 4:30 PM CDT | Severe Thunderstorm Warning | OUN | Woods, Woodward | 30 min |
| Apr 8, 4:32 PM CDT | Special Weather Statement | OUN | Roger Mills | 28 min |
| Apr 8, 4:32 PM CDT | Severe Thunderstorm Warning | OUN | Woods, Woodward | 28 min |
| Apr 8, 4:46 PM CDT | Severe Thunderstorm Warning | OUN | Custer, Dewey, Ellis, Roger Mills | 44 min |
| Apr 8, 4:53 PM CDT | Special Weather Statement | OUN | Harper | 37 min |
| Apr 8, 4:55 PM CDT | Severe Thunderstorm Warning | OUN | Woods | 35 min |
| Apr 8, 4:57 PM CDT | Severe Thunderstorm Warning | OUN | Harper, Woods | 33 min |
| Apr 8, 5:05 PM CDT | Special Weather Statement | OUN | Roger Mills | 40 min |
| Apr 8, 5:12 PM CDT | Special Weather Statement | OUN | Woodward | 33 min |
| Apr 8, 5:21 PM CDT | Severe Thunderstorm Warning | OUN | Harper, Woods, Woodward | 39 min |
| Apr 8, 5:24 PM CDT | Severe Thunderstorm Warning | OUN | Dewey, Ellis, Roger Mills, Woodward | 51 min |
| Apr 8, 5:25 PM CDT | Severe Thunderstorm Warning | OUN | Harper, Woods | 35 min |
| Apr 8, 5:39 PM CDT | Special Weather Statement | OUN | Woodward | 36 min |
| Apr 8, 5:55 PM CDT | Tornado Warning | OUN | Dewey, Ellis, Roger Mills, Woodward | 50 min |
| Apr 8, 6:00 PM CDT | Special Weather Statement | OUN | Woods | 15 min |
| Apr 8, 6:41 PM CDT | Special Weather Statement | OUN | Roger Mills | 34 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2015Every severe thunderstorm warning in 2015
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.