Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 341, NWS Norman, OK

May 10, 20154 counties in Texas

NWS Norman, OK issued this severe thunderstorm warning at May 10, 2015, 3:54 AM CDT for 4 counties in Texas. It was in force for 51 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 10, 2015, 3:54 AM CDT (08:54 UTC)
Expired: May 10, 2015, 4:45 AM CDT
In force: 51 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Baylor County, TX, Foard County, TX, Knox County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 77 km from the middle of the area, began a volume at 08:56 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

Fort Worth, TX (KFWD), launched 00:00Z, 8.9 hours before the alert went out and 232 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: 2343 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1015 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 316 m²/s²
0-3 km storm-relative helicity: 396 m²/s²
Significant tornado parameter: 5.1
Supercell composite: 26.9

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 10, 12:16 AM CDT, 3 hours 38 minutes earlier.

Area forecast discussion, May 10, 12:16 AM CDT, 3 hours 38 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 10, 2:54 AM CDT, 1 hour 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

Local storm report, May 9, 10:36 PM CDT, 5 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1036 PM CDT SAT MAY 09 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1035 PM     FLASH FLOOD      ADA                     34.77N 96.68W
05/09/2015                   PONTOTOC           OK   PUBLIC

            STREET FLOODING IN ADA. HIGH WATER SHORTING OUT TRAFFIC
            LIGHT CONTROLS.

&&

MDAY

Special weather statement, May 9, 10:38 PM CDT, 5 hours 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1038 PM CDT SAT MAY 9 2015

OKZ004-005-100415-
HARPER OK-WOODS OK-
1038 PM CDT SAT MAY 9 2015

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL HARPER AND NORTHWESTERN
WOODS COUNTIES UNTIL 1115 PM CDT...

AT 1035 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 6 MILES SOUTHWEST
OF BUFFALO...MOVING NORTHEAST AT 45 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...

LOCATIONS IMPACTED INCLUDE...
BUFFALO AND SELMAN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE WEATHER IS NOT EXPECTED AND NO WARNINGS ARE ANTICIPATED AT
THIS TIME.

&&

LAT...LON 3700 9936 3686 9931 3660 9983 3684 9980
      3700 9959
TIME...MOT...LOC 0335Z 231DEG 39KT 3677 9972

MAHALE

Special weather statement, May 9, 10:51 PM CDT, 5 hours 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, May 9, 11:34 PM CDT, 4 hours 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, May 10, 12:03 AM CDT, 3 hours 51 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 10, 3:25 AM 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>

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:11 PM CDT	Tornado Warning	OUN	Bryan, Johnston, Marshall	34 min
May 9, 7:21 PM CDT	Severe Thunderstorm Warning	OUN	Grady, Jefferson, Stephens	39 min
May 9, 7:23 PM CDT	Flash Flood Warning	OUN	Comanche, Cotton, Grady, Jefferson, Stephens	112 min
May 9, 7:33 PM CDT	Tornado Warning Tornado observed	OUN	Atoka, Bryan	27 min
May 9, 7:41 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Tillman	11 min
May 9, 7:44 PM CDT	Tornado Warning	OUN	Atoka, Bryan	31 min
May 9, 7:59 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan	30 min
May 9, 7:59 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Grady, McClain, Stephens	46 min
May 9, 8:24 PM CDT	Special Weather Statement	OUN	Atoka	36 min
May 9, 8:25 PM CDT	Flash Flood Warning	OUN	Carter, Cleveland, Garvin, McClain, Murray, Pontotoc and 2 more	3 hr
May 9, 8:32 PM CDT	Special Weather Statement	OUN	Custer	28 min
May 9, 8:44 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain, Murray, Pottawatomie	46 min
May 9, 9:06 PM CDT	Special Weather Statement	OUN	Custer	24 min
May 9, 9:07 PM CDT	Special Weather Statement	OUN	Atoka	23 min
May 9, 9:23 PM CDT	Severe Thunderstorm Warning	OUN	Coal, Garvin, Murray, Pontotoc	52 min
May 9, 9:32 PM CDT	Flash Flood Warning	OUN	Coal, Garvin, Hughes, McClain, Murray, Pontotoc and 2 more	3 hr
May 9, 10:16 PM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes, Pontotoc	44 min
May 9, 10:38 PM CDT	Special Weather Statement	OUN	Harper	37 min
May 9, 10:41 PM CDT	Severe Thunderstorm Warning	OUN	Johnston, Murray, Pontotoc	49 min
May 9, 10:51 PM CDT	Special Weather Statement	OUN	Hughes	24 min
May 9, 11:22 PM CDT	River Flood Warning	OUN	Hughes, Seminole	58 hr
May 9, 11:34 PM CDT	Special Weather Statement	OUN	Coal	26 min
May 10, 12:03 AM CDT	Special Weather Statement	OUN	Coal	42 min
May 10, 12:17 AM CDT	River Flood Warning	OUN	Caddo, Garvin, Grady	51 hr
May 10, 3:15 AM CDT	River Flood Warning	OUN	Atoka	4 days
May 10, 5:04 AM CDT	Special Weather Statement	OUN	Comanche, Greer, Jackson, Kiowa, Tillman	56 min
May 10, 5:35 AM CDT	River Flood Warning	OUN	Hughes	12 hr
May 10, 5:37 AM CDT	Special Weather Statement	OUN	Carter, Jefferson, Stephens	53 min
May 10, 5:58 AM CDT	Special Weather Statement	OUN	Caddo, Kiowa, Washita	32 min
May 10, 7:30 AM CDT	Special Weather Statement	OUN	Seminole	30 min
May 10, 8:02 AM CDT	Flash Flood Warning	OUN	Hughes, Pontotoc, Seminole	3 hr
May 10, 8:05 AM CDT	Severe Thunderstorm Warning	OUN	Hughes, Pontotoc, Seminole	40 min
May 10, 8:12 AM CDT	Special Weather Statement	OUN	Bryan	33 min
May 10, 8:30 AM CDT	Severe Thunderstorm Warning	OUN	Hughes	45 min
May 10, 9:03 AM CDT	River Flood Warning	OUN	Lincoln, Oklahoma, Pottawatomie	10 hr
May 10, 12:09 PM CDT	Special Weather Statement	OUN	Marshall	36 min
May 10, 12:29 PM CDT	Special Weather Statement	OUN	Kay	31 min
May 10, 12:30 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Love, Marshall, Murray	45 min
May 10, 12:35 PM CDT	Special Weather Statement	OUN	Garfield	25 min
May 10, 12:54 PM CDT	Special Weather Statement	OUN	Coal, Johnston	51 min
May 10, 12:58 PM CDT	Special Weather Statement	OUN	Bryan	32 min
May 10, 1:01 PM CDT	Special Weather Statement	OUN	Kay	29 min
May 10, 1:05 PM CDT	Flash Flood Warning	OUN	Carter, Johnston, Love, Marshall	3 hr
May 10, 1:32 PM CDT	Special Weather Statement	OUN	Kay	28 min
May 10, 1:51 PM CDT	Special Weather Statement	OUN	Bryan	39 min
May 10, 2:02 PM CDT	Flash Flood Warning	OUN	Atoka, Bryan, Johnston, Marshall	8 hr
May 10, 2:07 PM CDT	Special Weather Statement	OUN	Johnston	38 min
May 10, 2:45 PM CDT	Special Weather Statement	OUN	Marshall	45 min
May 10, 3:31 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal, Hughes, Johnston	44 min
May 10, 4:00 PM CDT	Severe Thunderstorm Warning	OUN	Bryan	45 min
May 10, 4:09 PM CDT	Tornado Warning	OUN	Bryan	36 min
May 10, 4:31 PM CDT	Flash Flood Warning	OUN	Carter, Johnston, Love, Marshall	6 hr
May 10, 4:37 PM CDT	Severe Thunderstorm Warning	OUN	Bryan	23 min
May 10, 4:45 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Love, Marshall	30 min
May 10, 4:47 PM CDT	Special Weather Statement	OUN	Marshall	28 min
May 10, 4:57 PM CDT	Special Weather Statement	OUN	Atoka, Bryan	48 min
May 10, 4:58 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Johnston, Marshall	32 min
May 10, 5:10 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan	50 min
May 10, 5:17 PM CDT	Special Weather Statement	OUN	Love, Marshall	28 min
May 10, 5:23 PM CDT	Severe Thunderstorm Warning	OUN	Bryan, Johnston, Marshall	37 min
May 10, 5:50 PM CDT	Special Weather Statement	OUN	Cleveland, McClain	25 min
May 10, 5:53 PM CDT	Flash Flood Warning	OUN	Atoka, Bryan, Coal, Johnston	4 hr
May 10, 5:55 PM CDT	Tornado Warning	OUN	Atoka	23 min
May 10, 6:00 PM CDT	Special Weather Statement	OUN	Marshall	45 min
May 10, 6:05 PM CDT	Areal Flood Advisory	OUN	Cleveland, Garvin, Grady, Lincoln, McClain, Oklahoma and 2 more	115 min
May 10, 6:23 PM CDT	Special Weather Statement	OUN	Love	52 min
May 10, 6:45 PM CDT	Special Weather Statement	OUN	Atoka	45 min
May 10, 6:51 PM CDT	Severe Thunderstorm Warning	OUN	Atoka	39 min
May 10, 6:53 PM CDT	Special Weather Statement	OUN	Jefferson	37 min
May 10, 3:25 AM CDT	Special Weather Statement	OUN	Archer, Baylor, Knox	50 min
May 10, 4:18 AM CDT	Special Weather Statement	OUN	Archer, Clay, Wichita	42 min
May 10, 4:35 AM CDT	Special Weather Statement	OUN	Wilbarger	25 min
May 10, 4:40 AM CDT	Special Weather Statement	OUN	Wilbarger	35 min
May 10, 4:58 AM CDT	Special Weather Statement	OUN	Clay, Wichita	47 min

Nearby

Severe Thunderstorm Warnings in Texas, 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.