Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 276, NWS Norman, OK

May 14, 2020Ellis County, Harper County, Woodward County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 14, 2020, 9:41 PM CDT for Ellis County, Harper County, Woodward County, Oklahoma. It was in force for 49 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: May 14, 2020, 9:41 PM CDT (02:41 UTC)
Expired: May 14, 2020, 10:30 PM CDT
In force: 49 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 02:42 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 00:00Z, 2.7 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: 730 J/kg
Mixed-layer CIN: -212 J/kg
Mixed-layer LCL: 1402 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

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 May 14, 6:59 PM CDT, 2 hours 42 minutes earlier.

Area forecast discussion, May 14, 6:59 PM CDT, 2 hours 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>

Hazardous weather outlook, May 14, 12:45 PM CDT, 8 hours 56 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, May 14, 8:25 PM CDT, 1 hour 16 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, May 14, 9:04 PM CDT, 37 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, May 14, 9:12 PM CDT, 29 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, May 14, 9:23 PM CDT, 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>

Special weather statement, May 14, 9:26 PM CDT, 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, May 14, 9:29 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>

The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 8:10 PM CDT	Special Weather Statement	OUN	Major	35 min
May 14, 8:17 PM CDT	Severe Thunderstorm Warning	OUN	Major, Woods, Woodward	43 min
May 14, 8:25 PM CDT	Special Weather Statement	OUN	Ellis	35 min
May 14, 8:52 PM CDT	Severe Thunderstorm Warning	OUN	Major, Woods	68 min
May 14, 9:04 PM CDT	Special Weather Statement	OUN	Ellis	26 min
May 14, 9:10 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Woodward	50 min
May 14, 9:26 PM CDT	Special Weather Statement	OUN	Ellis	34 min
May 14, 9:51 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Major, Woods	54 min
May 14, 10:19 PM CDT	Areal Flood Advisory	OUN	Major	3 hr
May 14, 10:31 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Major, Woods	59 min
May 14, 11:23 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major, Woods	52 min
May 15, 12:07 AM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Major	32 min
May 15, 1:18 AM CDT	Special Weather Statement	OUN	Garfield	27 min
May 15, 10:59 AM CDT	Flood Watch	OUN	Atoka, Bryan, Carter, Cleveland, Coal, Comanche and 17 more	16 hr
May 15, 12:16 PM CDT	Special Weather Statement	OUN	Hughes	29 min
May 15, 12:32 PM CDT	Special Weather Statement	OUN	Pottawatomie	28 min
May 15, 12:41 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Pottawatomie	49 min
May 15, 12:57 PM CDT	Areal Flood Advisory	OUN	Hughes, Pottawatomie, Seminole	3 hr
May 15, 1:13 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Pottawatomie	47 min
May 15, 1:27 PM CDT	Special Weather Statement	OUN	Cleveland	33 min
May 15, 1:38 PM CDT	Areal Flood Advisory	OUN	Cleveland, Pottawatomie	3 hr
May 15, 1:40 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain	35 min
May 15, 2:15 PM CDT	Special Weather Statement	OUN	McClain	30 min
May 15, 2:20 PM CDT	Special Weather Statement	OUN	Grady	25 min
May 15, 2:21 PM CDT	Areal Flood Advisory	OUN	Cleveland, Garvin, Grady, McClain, Stephens	114 min
May 15, 2:42 PM CDT	Special Weather Statement	OUN	Garvin, Grady	33 min
May 15, 2:57 PM CDT	Severe Thunderstorm Warning	OUN	Grady	33 min
May 15, 3:07 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady	23 min
May 15, 3:12 PM CDT	Areal Flood Advisory	OUN	Caddo, Comanche, Grady	63 min
May 15, 3:21 PM CDT	Special Weather Statement	OUN	Pontotoc	39 min
May 15, 3:26 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady	34 min
May 15, 3:31 PM CDT	Flash Flood Warning	OUN	Caddo, Comanche, Grady, Stephens	119 min
May 15, 3:33 PM CDT	Special Weather Statement	OUN	Stephens	27 min
May 15, 3:40 PM CDT	Special Weather Statement	OUN	Jackson	50 min
May 15, 3:47 PM CDT	Special Weather Statement	OUN	Coal	43 min
May 15, 3:47 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	43 min
May 15, 3:48 PM CDT	Special Weather Statement	OUN	Garvin	27 min
May 15, 4:00 PM CDT	Special Weather Statement	OUN	Caddo	30 min
May 15, 4:07 PM CDT	Special Weather Statement	OUN	Atoka	53 min
May 15, 4:10 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Grady, Stephens	35 min
May 15, 4:13 PM CDT	Flash Flood Warning	OUN	Carter, Garvin, Murray, Stephens	3 hr
May 15, 4:15 PM CDT	River Flood Warning	OUN	Pottawatomie, Seminole	11 hr
May 15, 4:17 PM CDT	Special Weather Statement	OUN	Garvin	28 min
May 15, 4:22 PM CDT	Special Weather Statement	OUN	Harmon	53 min
May 15, 4:28 PM CDT	Special Weather Statement	OUN	Kiowa	17 min
May 15, 4:28 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray	47 min
May 15, 4:43 PM CDT	Severe Thunderstorm Warning	OUN	Grady, Stephens	32 min
May 15, 4:53 PM CDT	Special Weather Statement	OUN	Comanche	37 min
May 15, 4:59 PM CDT	Severe Thunderstorm Warning	OUN	Harmon, Jackson	61 min
May 15, 5:03 PM CDT	Special Weather Statement	OUN	Bryan	42 min
May 15, 5:12 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady, Stephens	33 min
May 15, 5:13 PM CDT	Special Weather Statement	OUN	Garvin	47 min
May 15, 5:16 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	44 min
May 15, 5:18 PM CDT	Special Weather Statement	OUN	Murray	72 min
May 15, 5:22 PM CDT	Special Weather Statement	OUN	Grady	23 min
May 15, 5:23 PM CDT	Areal Flood Advisory	OUN	Coal, Garvin, Murray, Pontotoc, Seminole	2 hr
May 15, 5:23 PM CDT	Special Weather Statement	OUN	Kiowa	37 min
May 15, 5:28 PM CDT	Flash Flood Warning	OUN	Caddo, Comanche, Cotton, Garvin, Grady, Stephens	92 min
May 15, 5:32 PM CDT	Areal Flood Advisory	OUN	Comanche, Jackson, Kiowa, Tillman	118 min
May 15, 5:35 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	25 min
May 15, 5:41 PM CDT	Areal Flood Advisory	OUN	Harmon, Jackson	2 hr
May 15, 5:41 PM CDT	Special Weather Statement	OUN	Caddo	34 min
May 15, 5:48 PM CDT	Special Weather Statement	OUN	Tillman	42 min
May 15, 5:52 PM CDT	Special Weather Statement	OUN	Stephens	23 min
May 15, 5:57 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Tillman	63 min
May 15, 5:58 PM CDT	Special Weather Statement	OUN	Stephens	32 min
May 15, 6:03 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	27 min
May 15, 6:04 PM CDT	Flash Flood Warning	OUN	Comanche, Jackson, Kiowa, Tillman	3 hr
May 15, 6:06 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Grady	8 min
May 15, 6:12 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	63 min
May 15, 6:20 PM CDT	Special Weather Statement	OUN	Comanche	25 min
May 15, 6:25 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	26 min
May 15, 6:26 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	34 min
May 15, 6:35 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Tillman	40 min
May 15, 6:44 PM CDT	Flash Flood Warning	OUN	Garvin, Stephens	91 min
May 15, 6:57 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Stephens	48 min
May 15, 6:58 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	77 min
May 15, 6:59 PM CDT	Flash Flood Warning	OUN	Caddo, Comanche, Grady, Tillman	3 hr
May 15, 4:48 PM CDT	Special Weather Statement	OUN	Hardeman	42 min
May 15, 5:56 PM CDT	Severe Thunderstorm Warning	OUN	Hardeman	64 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2020 Every severe thunderstorm warning in 2020

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.