Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 192, NWS Norman, OK

May 7, 2013Dewey County, Major County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 7, 2013, 10:14 PM CDT for Dewey County, Major County, Oklahoma. It was in force for 46 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 7, 2013, 10:14 PM CDT (03:14 UTC)
Expired: May 7, 2013, 11:00 PM CDT
In force: 46 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Dewey County, OK, Major County, OK

The radar

The Vance AFB radar (KVNX), 87 km from the middle of the area, began a volume at 03:17 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
May 7, 5:54 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 3.2 hours before the alert went out and 206 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: 77 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 2294 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 229 m²/s²
0-3 km storm-relative helicity: 439 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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 7, 8:58 PM CDT, 1 hour 16 minutes earlier.

Area forecast discussion, May 7, 8:58 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>

Hazardous weather outlook, May 7, 12:00 PM CDT, 10 hours 14 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1200 PM CDT TUE MAY 7 2013

OKZ004>048-050>052-TXZ083>090-081000-
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-
1200 PM CDT TUE MAY 7 2013

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...THIS AFTERNOON THROUGH TONIGHT...

THUNDERSTORM OUTLOOK...
ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS EVENING
ACROSS NORTHWEST OKLAHOMA. THE AREA OF CONCERN WILL BE NORTH
AND WEST OF LINE EXTENDING FROM SAYRE TO CHEROKEE.

IMPACTS...
THE MAIN HAZARD WILL BE DAMAGING WIND GUSTS OF 60 TO 70 MPH.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS
NORTHWEST OKLAHOMA SHOULD BE PREPARED FOR SEVERE WEATHER
OPERATIONS THIS EVENING.

DISCUSSION...
ISOLATED THUNDERSTORMS MAY REDEVELOP LATE THIS AFTERNOON OVER
SOUTHWEST KANSAS AND THE EASTERN PARTS OF THE TEXAS AND OKLAHOMA
PANHANDLES...THEN MOVE EAST AND SOUTHEAST. LARGE DIFFERENCES IN
TEMPERATURE AND DEWPOINT BELOW CLOUD BASE WILL YIELD THE THREAT
OF DAMAGING WIND GUSTS. A FEW HIGHLY ELEVATED SUPERCELLS WILL
ALSO BE POSSIBLE AND WILL YIELD A THREAT FOR LARGE HAIL. IF ANY
THUNDERSTORMS CAN BECOME SUSTAINED LATE IN THE EVENING...THE
ENVIRONMENT WILL SUPPORT THE CONTINUATION OF STRONG STORMS ACROSS
NORTH-CENTRAL OKLAHOMA TOWARD AND AFTER MIDNIGHT.

ADDITIONAL STORMS MAY TRY TO FORM LATE THIS AFTERNOON OVER FAR
WEST TEXAS AND MOVE EASTWARD TOWARD WESTERN NORTH TEXAS DURING
THE EVENING HOURS. IF ANY STORMS CAN MAKE IT INTO THE QUANAH...
CROWELL...KNOX CITY...AND SEYMOUR AREAS...THEY MAY BE
ACCOMPANIED BY STRONG WIND GUSTS.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT WEDNESDAY MAY 8.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...40 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...40 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

THUNDERSTORM OUTLOOK...
THUNDERSTORMS CHANCES WILL PERSIST THROUGH THE END OF THE WEEK.
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS LATE WEDNESDAY
AFTERNOON AND EVENING ACROSS THE WESTERN-THIRD OF OKLAHOMA AND
ADJACENT PARTS OF NORTH TEXAS. SEVERE THUNDERSTORMS WILL BE
POSSIBLE FARTHER EAST OVER CENTRAL AND SOUTHERN OKLAHOMA ON
THURSDAY. LARGE HAIL AND DAMAGING WIND GUSTS WILL BE THE MAIN
HAZARDS.

A LESSER CHANCE FOR THUNDERSTORM WILL CONTINUE FRIDAY AND SATURDAY
BUT SEVERE WEATHER IS NOT EXPECTED.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM
WEDNESDAY MORNING...WITH UPDATES AS NEEDED.

In the hours before

Special weather statement, May 7, 6:32 PM CDT, 3 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>

Special weather statement, May 7, 7:01 PM CDT, 3 hours 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
701 PM CDT TUE MAY 7 2013

OKZ004-009-080030-
HARPER OK-ELLIS OK-
701 PM CDT TUE MAY 7 2013

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN HARPER AND NORTHERN
ELLIS COUNTIES UNTIL 730 PM CDT...

AT 657 PM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING FROM
6 MILES NORTH OF MAY TO 10 MILES SOUTH OF LAVERNE...MOVING NORTHEAST
AT 25 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 50 MPH...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.

&&

LAT...LON 3649 10000 3669 9997 3683 9943 3659 9958
      3659 9961 3654 9962
TIME...MOT...LOC 2357Z 243DEG 22KT 3671 9974 3657 9992

30

Local storm report, May 7, 7:08 PM CDT, 3 hours 6 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 7, 8:35 PM CDT, 1 hour 39 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 7, 9:55 PM CDT, 19 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 7, 10:12 PM CDT, 2 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 7, 7:01 PM CDT	Special Weather Statement	OUN	Harper	29 min
May 7, 7:11 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper	49 min
May 7, 7:48 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woodward	42 min
May 7, 8:35 PM CDT	Special Weather Statement	OUN	Woodward	25 min
May 7, 9:55 PM CDT	Special Weather Statement	OUN	Major	35 min
May 7, 10:12 PM CDT	Special Weather Statement	OUN	Dewey	33 min
May 7, 11:01 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey	44 min
May 7, 11:43 PM CDT	Special Weather Statement	OUN	Blaine	32 min
May 8, 3:20 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Roger Mills	40 min
May 8, 3:43 PM CDT	Special Weather Statement	OUN	Canadian	32 min
May 8, 3:49 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Canadian, Kingfisher	41 min
May 8, 3:56 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Ellis, Roger Mills	49 min
May 8, 4:00 PM CDT	Special Weather Statement	OUN	Woodward	30 min
May 8, 4:18 PM CDT	Severe Thunderstorm Warning	OUN	Woodward	42 min
May 8, 4:28 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher	47 min
May 8, 4:41 PM CDT	Severe Thunderstorm Warning	OUN	Dewey	49 min
May 8, 4:45 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian	45 min
May 8, 5:21 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	39 min
May 8, 5:25 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey	50 min
May 8, 5:28 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian	47 min
May 8, 5:46 PM CDT	Severe Thunderstorm Warning	OUN	Major, Woods, Woodward	44 min
May 8, 5:49 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Major, Woodward	41 min
May 8, 6:03 PM CDT	Special Weather Statement	OUN	Alfalfa	27 min
May 8, 6:15 PM CDT	Severe Thunderstorm Warning	OUN	Canadian	45 min
May 8, 6:17 PM CDT	Severe Thunderstorm Warning	OUN	Blaine	43 min
May 8, 6:22 PM CDT	Special Weather Statement	OUN	Caddo	23 min
May 8, 6:25 PM CDT	Severe Thunderstorm Warning	OUN	Major	50 min
May 8, 6:29 PM CDT	Special Weather Statement	OUN	Grant	31 min
May 8, 6:36 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Grady	39 min
May 8, 6:36 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	39 min
May 8, 6:45 PM CDT	Severe Thunderstorm Warning	OUN	Woodward	45 min
May 8, 6:57 PM CDT	Severe Thunderstorm Warning	OUN	Canadian	48 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2013 Every severe thunderstorm warning in 2013

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.