Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 516, NWS Norman, OK

June 11, 2015Ellis County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 11, 2015, 10:32 PM CDT for Ellis County, Oklahoma. It was in force for 43 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: Jun 11, 2015, 10:32 PM CDT (03:32 UTC)
Expired: Jun 11, 2015, 11:15 PM CDT
In force: 43 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Ellis County, OK

The radar

The Vance AFB radar (KVNX), 157 km from the middle of the area, began a volume at 03:33 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
Jun 11, 5:03 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 3.5 hours before the alert went out and 173 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: 789 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 1690 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 5.6

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 Jun 11, 6:20 PM CDT, 4 hours 12 minutes earlier.

Area forecast discussion, Jun 11, 6:20 PM CDT, 4 hours 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>

Hazardous weather outlook, Jun 11, 8:05 PM CDT, 2 hours 27 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>

In the hours before

Special weather statement, Jun 11, 7:42 PM CDT, 2 hours 50 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, Jun 11, 8:15 PM CDT, 2 hours 17 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, Jun 11, 9:10 PM CDT, 1 hour 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>

Special weather statement, Jun 11, 9:43 PM CDT, 49 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
Jun 11, 7:42 PM CDT	Special Weather Statement	OUN	Harper	33 min
Jun 11, 8:15 PM CDT	Special Weather Statement	OUN	Harper	30 min
Jun 11, 9:10 PM CDT	Special Weather Statement	OUN	Harper	35 min
Jun 11, 9:43 PM CDT	Special Weather Statement	OUN	Harper	32 min
Jun 11, 9:56 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods	37 min
Jun 11, 10:35 PM CDT	Special Weather Statement	OUN	Harper	25 min
Jun 11, 11:17 PM CDT	Special Weather Statement	OUN	Woodward	28 min
Jun 11, 11:31 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woodward	28 min
Jun 12, 12:18 AM CDT	Special Weather Statement	OUN	Harper	27 min
Jun 12, 1:09 AM CDT	Special Weather Statement	OUN	Harper	51 min
Jun 12, 1:14 AM CDT	Special Weather Statement	OUN	Ellis	31 min
Jun 12, 1:27 AM CDT	Areal Flood Advisory	OUN	Ellis, Harper, Woodward	4 hr
Jun 12, 1:47 AM CDT	Special Weather Statement	OUN	Ellis, Harper, Woods, Woodward	43 min
Jun 12, 2:21 AM CDT	Special Weather Statement	OUN	Roger Mills	9 min
Jun 12, 2:29 AM CDT	Special Weather Statement	OUN	Dewey, Roger Mills, Woods, Woodward	46 min
Jun 12, 2:31 AM CDT	Areal Flood Advisory	OUN	Grant	3 hr
Jun 12, 2:56 AM CDT	Flash Flood Watch	OUN	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 31 more	49 hr
Jun 12, 3:07 AM CDT	Areal Flood Advisory	OUN	Harper, Major, Woods, Woodward	3 hr
Jun 12, 3:13 AM CDT	Special Weather Statement	OUN	Alfalfa, Major, Woods	47 min
Jun 12, 4:29 AM CDT	Special Weather Statement	OUN	Garfield, Grant	31 min
Jun 12, 5:03 AM CDT	Special Weather Statement	OUN	Garfield, Grant, Kay, Noble	42 min
Jun 12, 12:52 PM CDT	Areal Flood Advisory	OUN	Roger Mills	3 hr
Jun 12, 2:23 PM CDT	Special Weather Statement	OUN	Ellis	52 min
Jun 12, 3:03 PM CDT	Special Weather Statement	OUN	Harmon	42 min
Jun 12, 3:05 PM CDT	Special Weather Statement	OUN	Ellis	40 min
Jun 12, 3:36 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Harmon	39 min
Jun 12, 3:39 PM CDT	Special Weather Statement	OUN	Dewey	51 min
Jun 12, 3:49 PM CDT	Severe Thunderstorm Warning	OUN	Dewey	41 min
Jun 12, 4:14 PM CDT	Severe Thunderstorm Warning	OUN	Harmon	46 min
Jun 12, 4:22 PM CDT	Special Weather Statement	OUN	Roger Mills	38 min
Jun 12, 4:24 PM CDT	Special Weather Statement	OUN	Greer	36 min
Jun 12, 4:26 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Major, Woodward	49 min
Jun 12, 4:35 PM CDT	Special Weather Statement	OUN	Woodward	40 min
Jun 12, 4:56 PM CDT	Special Weather Statement	OUN	Greer, Harmon	49 min
Jun 12, 4:57 PM CDT	Severe Thunderstorm Warning	OUN	Woodward	34 min
Jun 12, 5:07 PM CDT	Special Weather Statement	OUN	Roger Mills	38 min
Jun 12, 5:19 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon	41 min
Jun 12, 5:25 PM CDT	Areal Flood Advisory	OUN	Greer, Harmon	4 hr
Jun 12, 5:25 PM CDT	Special Weather Statement	OUN	Custer, Dewey	50 min
Jun 12, 5:30 PM CDT	Special Weather Statement	OUN	Woodward	45 min
Jun 12, 5:37 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey	38 min
Jun 12, 5:54 PM CDT	Special Weather Statement	OUN	Greer	66 min
Jun 12, 6:15 PM CDT	Special Weather Statement	OUN	Blaine	45 min
Jun 12, 6:17 PM CDT	Special Weather Statement	OUN	Harmon	58 min
Jun 12, 6:34 PM CDT	Areal Flood Advisory	OUN	Blaine, Custer, Dewey, Roger Mills	3 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2015 Every 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.