Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 256, NWS Norman, OK

August 18, 2014Ellis County, Harper County, Woodward County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 18, 2014, 6:45 PM CDT for Ellis County, Harper County, Woodward County, Oklahoma. 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 counties it named.

The facts

Issued: Aug 18, 2014, 6:45 PM CDT (23:45 UTC)
Expired: Aug 18, 2014, 7:15 PM CDT
In force: 30 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Ellis County, OK, Harper County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 131 km from the middle of the area, began a volume at 23:48 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

Dodge City, (KDDC), launched 12:00Z, 11.8 hours before the alert went out and 147 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 200 J/kg
Mixed-layer CIN: -350 J/kg
Mixed-layer LCL: 2201 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 210 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Aug 18, 6:32 PM CDT, 13 minutes earlier.

Area forecast discussion, Aug 18, 6:32 PM CDT, 13 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, Aug 18, 9:55 AM CDT, 8 hours 50 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
955 AM CDT MON AUG 18 2014

OKZ004>048-050>052-TXZ083>090-191000-
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-
955 AM CDT MON AUG 18 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN...
WESTERN...CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH
TEXAS.

.DAY ONE...TODAY AND TONIGHT...

.THUNDERSTORMS...
ISOLATED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON INTO TONIGHT
ACROSS PORTIONS OF NORTHERN OKLAHOMA. THE MAIN HAZARDS WITH ANY
STORM ARE GUSTY WINDS UP TO 50 MPH...LOCALLY HEAVY RAINFALL...
FREQUENT LIGHTNING...AND SMALL HAIL. ORGANIZED SEVERE STORMS ARE
NOT EXPECTED TODAY OR TONIGHT.

.HEAT...
HOT AND HUMID CONDITIONS ARE EXPECTED TODAY...MAINLY ACROSS
SOUTHWESTERN OKLAHOMA AND WESTERN NORTH TEXAS WITH TRIPLE DIGIT
TEMPERATURES AND HEAT INDEX VALUES. SO TAKE HEAT SAFETY
PRECAUTIONS IF YOU ARE GOING TO BE OUTDOORS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

.HEAT...
HOT AND HUMID CONDITIONS WILL CONTINUE THROUGH THE WEEKEND...
WITH TRIPLE DIGIT TEMPERATURES AND HEAT INDEX VALUES ACROSS PARTS
OF OKLAHOMA AND WESTERN NORTH TEXAS. SO TAKE HEAT SAFETY
PRECAUTIONS IF YOU ARE GOING TO BE OUTDOORS.

GET GRAPHICS AND MORE DETAILS AT WEATHER.GOV/NORMAN...AND FOLLOW
OUR WEATHER FORECAST OFFICE ON TWITTER AND FACEBOOK.

MBS/30

In the hours before

Local storm report, Aug 18, 5:52 PM CDT, 53 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, Aug 18, 6:01 PM CDT, 44 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, Aug 18, 6:20 PM CDT, 25 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, Aug 18, 6:24 PM CDT, 21 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, Aug 18, 6:33 PM CDT, 12 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, Aug 18, 6:40 PM CDT, 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>

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 18, 1:39 AM CDT	Special Weather Statement	OUN	Grant, Kay	36 min
Aug 18, 2:10 AM CDT	Special Weather Statement	OUN	Garfield, Grant, Kay, Noble	50 min
Aug 18, 2:59 AM CDT	Special Weather Statement	OUN	Kay, Noble	31 min
Aug 18, 3:30 AM CDT	Special Weather Statement	OUN	Noble, Payne	30 min
Aug 18, 4:02 AM CDT	Special Weather Statement	OUN	Cleveland, Lincoln, Logan, Oklahoma	43 min
Aug 18, 5:15 AM CDT	Special Weather Statement	OUN	Logan	30 min
Aug 18, 3:16 PM CDT	Special Weather Statement	OUN	Noble	29 min
Aug 18, 3:26 PM CDT	Special Weather Statement	OUN	Grant	49 min
Aug 18, 3:35 PM CDT	Special Weather Statement	OUN	Alfalfa	25 min
Aug 18, 3:45 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant	45 min
Aug 18, 4:01 PM CDT	Special Weather Statement	OUN	Alfalfa	29 min
Aug 18, 4:03 PM CDT	Special Weather Statement	OUN	Noble	27 min
Aug 18, 4:17 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	43 min
Aug 18, 4:19 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant	41 min
Aug 18, 4:35 PM CDT	Special Weather Statement	OUN	Noble	10 min
Aug 18, 4:46 PM CDT	Special Weather Statement	OUN	Noble	14 min
Aug 18, 5:03 PM CDT	Special Weather Statement	OUN	Alfalfa, Garfield, Noble	27 min
Aug 18, 5:14 PM CDT	Severe Thunderstorm Warning	OUN	Garfield	46 min
Aug 18, 5:22 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant	53 min
Aug 18, 5:25 PM CDT	Special Weather Statement	OUN	Garfield	35 min
Aug 18, 5:39 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Logan, Noble, Payne	51 min
Aug 18, 6:01 PM CDT	Special Weather Statement	OUN	Harper	14 min
Aug 18, 6:20 PM CDT	Special Weather Statement	OUN	Canadian, Oklahoma	40 min
Aug 18, 6:24 PM CDT	Special Weather Statement	OUN	Harper	36 min
Aug 18, 6:33 PM CDT	Special Weather Statement	OUN	Logan	27 min
Aug 18, 6:40 PM CDT	Special Weather Statement	OUN	Payne	35 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2014 Every severe thunderstorm warning in 2014

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.