Alert archive / Oklahoma / Special Weather Statements in 2011

Special Weather Statement, NWS Norman, OK

October 11, 2011Ellis County, Oklahoma

NWS Norman, OK issued this special weather statement at Oct 11, 2011, 9:01 PM CDT for Ellis County, Oklahoma. It was in force for 14 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 11, 2011, 9:01 PM CDT (02:01 UTC)
Expired: Oct 11, 2011, 9:15 PM CDT
In force: 14 min
Issued by: NWS Norman, OK

County Ellis County, OK

The radar

The Vance AFB radar (KVNX), 145 km from the middle of the area, began a volume at 02:04 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

Lamont, OK (KLMN), launched 00:00Z, 2.0 hours before the alert went out and 192 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: 289 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 1519 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

<!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>

What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Oct 11, 6:28 PM CDT, 2 hours 33 minutes earlier.

Area forecast discussion, Oct 11, 6:28 PM CDT, 2 hours 33 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, Oct 11, 4:55 PM CDT, 4 hours 6 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATE
NATIONAL WEATHER SERVICE NORMAN OK
455 PM CDT TUE OCT 11 2011

OKZ004>048-050>052-TXZ083>090-121000-
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-
455 PM CDT TUE OCT 11 2011

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

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
SCATTERED STRONG STORMS ARE POSSIBLE THIS EVENING AND OVERNIGHT BUT
ORGANIZED SEVERE WEATHER IS UNLIKELY.

DISCUSSION...
AN UPPER-LEVEL STORM WILL MOVE FROM THE ROCKY MOUNTAIN STATES ACROSS
THE PLAINS TONIGHT. SCATTERED THUNDERSTORMS DEVELOPING OVER WEST
TEXAS AND THE PANHANDLE ARE EXPECTED TO PROGRESS EASTWARD THIS
EVENING AND OVERNIGHT. ALTHOUGH AMPLE WIND SHEAR WILL BE SEEN OVER
THE REGION...INSTABILITY WILL BE LACKING AFTER SUNDOWN. A FEW OF THE
STORMS MAY BECOME STRONG ENOUGH TO PRODUCE FREQUENT CLOUD TO GROUND
LIGHTNING...VERY HEAVY RAINFALL...AND SMALL HAIL...BUT SEVERE
WEATHER CHANCES WILL BE LOW. THE GREATEST CHANCE FOR STRONG STORMS
WILL BE ACROSS SOUTHERN OKLAHOMA AND WESTERN NORTH TEXAS.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT WEDNESDAY OCT 12.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE NWS NORMAN
         COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS... 10 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

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

THUNDERSTORM OUTLOOK...
SCATTERED THUNDERSTORMS MAY LINGER THROUGH WEDNESDAY MORNING OVER
AREAS NEAR AND EAST OF INTERSTATE-35. THE RISK OF SEVERE WEATHER
WILL BE LOW.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY 5 AM
WEDNESDAY.

In the hours before

Special weather statement, Oct 11, 8:22 PM CDT, 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
822 PM CDT TUE OCT 11 2011

OKZ009-014-120145-
ELLIS OK-ROGER MILLS OK-
822 PM CDT TUE OCT 11 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR FAR SOUTHWEST ELLIS AND FAR
NORTHWEST ROGER MILLS COUNTIES.

AT 821 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 14 MILES NORTHWEST
OF DURHAM...MOVING SOUTHEAST AT 30 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH...
WIND GUSTS 40 TO 50 MPH...

LAT...LON 3589 10000 3604 10001 3605 10000 3598 9981
      3582 9990 3588 10001

CJS

Special weather statement, Oct 11, 9:01 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
901 PM CDT TUE OCT 11 2011

OKZ009-120215-
ELLIS OK-
901 PM CDT TUE OCT 11 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR SOUTHEAST ELLIS COUNTY.

AT 901 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES SOUTHWEST
OF HARMON. ANOTHER STRONG STORM WAS LOCATED 8 MILES SOUTHEAST OF
HARMON. THE STORMS WERE MOVING EAST AT 20 MPH

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH...

LAT...LON 3617 9964 3615 9938 3601 9938 3601 9945
      3599 9946 3607 9969

CJS

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 11, 9:16 PM CDT	Special Weather Statement	OUN	Dewey	14 min
Oct 11, 9:31 PM CDT	Special Weather Statement	OUN	Dewey	14 min
Oct 11, 9:43 PM CDT	Special Weather Statement	OUN	Dewey	17 min
Oct 11, 11:36 PM CDT	Special Weather Statement	OUN	Oklahoma	24 min
Oct 12, 8:22 AM CDT	Special Weather Statement	OUN	Stephens	23 min
Oct 12, 8:41 AM CDT	Special Weather Statement	OUN	Stephens	19 min
Oct 11, 9:51 PM CDT	Special Weather Statement	OUN	Hardeman	24 min
Oct 11, 9:59 PM CDT	Severe Thunderstorm Warning	OUN	Hardeman	46 min
Oct 11, 10:26 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman	49 min
Oct 11, 11:14 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman, Wilbarger	61 min
Oct 11, 11:45 PM CDT	Special Weather Statement	OUN	Baylor	15 min
Oct 11, 11:50 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor	40 min
Oct 12, 12:08 AM CDT	Severe Thunderstorm Warning	OUN	Baylor, Wilbarger	67 min
Oct 12, 12:25 AM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor	65 min
Oct 12, 12:58 AM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor	62 min
Oct 12, 2:01 AM CDT	Severe Thunderstorm Warning	OUN	Archer	21 min

Nearby

Special Weather Statements in Oklahoma, 2011 Every special weather statement in 2011

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.