Alert archive / Arkansas / Special Weather Statements in 2011

Special Weather Statement, NWS Tulsa, OK

June 11, 2011Sebastian County, Arkansas

NWS Tulsa, OK issued this special weather statement at Jun 11, 2011, 2:41 PM CDT for Sebastian County, Arkansas. It was in force for 34 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
Jun 11, 2011, 2:41 PM CDT (19:41 UTC)
Expired
Jun 11, 2011, 3:15 PM CDT
In force
34 min
Issued by
NWS Tulsa, OK

County Sebastian County, AR

The radar

The Western Arkansas radar (KSRX), 35 km from the middle of the area, began a volume at 19:41 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

Springfield, MO (KSGF), launched 12:00Z, 7.7 hours before the alert went out and 219 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-pSkew-T log-p diagram, Springfield, MO at 12:00Z on 2011-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1495 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 2011-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 140 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1495 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
825 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
140 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.5

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 Tulsa, OK wrote its last area forecast discussion before this special weather statement went out at Jun 11, 12:10 PM CDT, 2 hours 31 minutes earlier.

Area forecast discussion, Jun 11, 12:10 PM CDT, 2 hours 31 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1210 PM CDT SAT JUN 11 2011

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM.
FOR THE 18Z TAFS... GENERALLY... VFR CONDITIONS WILL PREVAIL AT
ALL TAF SITES THROUGHOUT THE FORECAST PERIOD. HOWEVER... THERE
WILL BE A CHANCE FOR AFTERNOON AND EVENING THUNDERSTORMS TO AFFECT
ANY SITE. THIS HAS BEEN COVERED WITH TEMPO GROUPS. SITE KBVO WILL
ALSO HAVE A CHANCE FOR THUNDERSTORMS EARLY SUNDAY MORNING... WHICH
HAS BEEN INCLUDED WITH PROB30 GROUPS.

&&

.PREV DISCUSSION... /ISSUED 1100 AM CDT SAT JUN 11 2011/

..UPDATE...

DISCUSSION...
LINGERING LOW CLOUDS HAVE ALMOST COMPLETELY DISSIPATED ACROSS THE
REGION... LEAVING ONLY SCATTERED CIRRUS OVERHEAD. HOURLY TEMPS AND
DEWPOINTS ARE RUNNING CLOSE TO THE FORECAST GRIDS AT THIS HOUR. AM
STILL ANTICIPATING SHOWERS AND THUNDERSTORMS TO DEVELOP ACROSS THE
REGION LATER THIS AFTERNOON. NO CHANGES TO THE CURRENT FORECAST
ARE NECESSARY AT THIS TIME.

PREV DISCUSSION... /ISSUED 548 AM CDT SAT JUN 11 2011/

AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM.
SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP BY EARLY AFTERNOON
ACROSS PORTIONS OF EASTERN OKLAHOMA/NORTHWEST ARKANSAS NEAR VICINITY
OF STALLED BOUNDARY. MVFR CONDITIONS WILL BE LIKELY IN THE STRONGER
STORMS. OTHERWISE...PATCHY LIGHT FOG WILL BE POSSIBLE IN A FEW
LOCATIONS LATE TONIGHT...PRIMARILY WHERE PRECIPITATION OCCURS THIS
AFTERNOON.

PREV DISCUSSION... /ISSUED 301 AM CDT SAT JUN 11 2011/

DISCUSSION...
FRONTAL BOUNDARY EXTENDS FROM CENTRAL MISSOURI ACROSS EXTREME
NORTHEAST OKLAHOMA AND INTO SOUTHWEST OKLAHOMA THIS MORNING.
THUNDERSTORM COMPLEX THAT WAS ACROSS SOUTHWEST OKLAHOMA FRIDAY
EVENING CONTINUES TO DIMINISH AS IT MOVES INTO EASTERN OKLAHOMA
THIS MORNING. THE FRONT WILL CONTINUE TO SLOWLY SAG TO THE
SOUTH THROUGH THIS AFTERNOON BEFORE STALLING OUT. ADDITIONAL
THUNDERSTORMS WILL BE POSSIBLE ALONG THE FRONT THIS AFTERNOON
AND INTO THIS EVENING. ANY THUNDERSTORMS THAT DEVELOP WILL
HAVE THE POTENTIAL TO BECOME STRONG TO SEVERE WITH WIND
GUSTS TO AROUND 60 AND HAIL THE MAIN CONCERN. SLIGHTLY COOLER
TEMPERATURES ARE EXPECTED NORTH OF THE FRONTAL BOUNDARY
TODAY.

THE FRONT WILL MOVE NORTH AS A WARM FRONT ON SUNDAY PUTTING
AN END TO THE CHANCES OF SHOWERS AND THUNDERSTORMS AS
HIGH PRESSURE BUILDS AT THE SURFACE AND ALOFT. THIS WILL
ALLOW TEMPERATURES TO CLIMB INTO THE LOWER TO MIDDLE 90S
SUNDAY THROUGH TUESDAY BEFORE ANOTHER FRONTAL BOUNDARY
IS ABLE TO MOVE INTO THE REGION. WILL KEEP LOW END POPS
IN THE FORECAST TUE NIGHT INTO THURSDAY MORNING AS AN
ASSOCIATED MID-LEVEL TROF MOVES ACROSS THE PLAINS AND INTO
THE MID-WEST.

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
AR...NONE.
&&

SHORT TERM...99
LONG TERM....99
AVIATION...06
Hazardous weather outlook, Jun 11, 1:00 PM CDT, 1 hour 41 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
100 PM CDT SAT JUN 11 2011

ARZ001-002-010-011-019-020-029-OKZ049-053>076-121000-
ADAIR OK-BENTON AR-CARROLL AR-CHEROKEE OK-CHOCTAW OK-CRAIG OK-
CRAWFORD AR-CREEK OK-DELAWARE OK-FRANKLIN AR-HASKELL OK-LATIMER OK-
LE FLORE OK-MADISON AR-MAYES OK-MCINTOSH OK-MUSKOGEE OK-NOWATA OK-
OKFUSKEE OK-OKMULGEE OK-OSAGE OK-OTTAWA OK-PAWNEE OK-PITTSBURG OK-
PUSHMATAHA OK-ROGERS OK-SEBASTIAN AR-SEQUOYAH OK-TULSA OK-WAGONER OK-
WASHINGTON OK-WASHINGTON AR-
100 PM CDT SAT JUN 11 2011

THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SEVERE THUNDERSTORM.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...MID AFTERNOON.

DISCUSSION...
A QUASI-STATIONARY FRONT WILL STRETCH ACROSS THE AREA THIS AFTERNOON...
PROVIDING THE FOCUS FOR SCATTERED THUNDERSTORM DEVELOPMENT. A FEW
OF THESE STORMS COULD BE SEVERE WITH LARGE HAIL AND DAMAGING
WINDS. THE ATMOSPHERE WILL BEGIN TO STABILIZE AFTER SUNSET WITH
THE SEVERE THREAT EVENTUALLY DIMINISHING. IN ADDITION... A FEW
STORMS THAT DEVELOP WELL WEST OF THE REGION COULD MOVE INTO FAR
NORTHEAST OKLAHOMA OVERNIGHT TONIGHT.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
ACTIVATION OF THE REGIONAL SPOTTER NETWORK LIKELY.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.
SUNDAY...THUNDERSTORM POTENTIAL.
MONDAY...HIGH WIND POTENTIAL...DANGEROUS HEAT POTENTIAL.
TUESDAY...THUNDERSTORM POTENTIAL.
WEDNESDAY...THUNDERSTORM POTENTIAL.
THURSDAY...NO HAZARDS.
FRIDAY...HIGH WIND POTENTIAL.

EXTENDED DISCUSSION...
A FEW THUNDERSTORMS COULD BE ONGOING ACROSS FAR NORTHEAST
OKLAHOMA SUNDAY MORNING BEFORE SHIFTING EAST. LIMITED THUNDERSTORM
CHANCES WILL BE BACK IN THE FORECAST TUESDAY INTO WEDNESDAY AS
ANOTHER WEAK COLD FRONT PUSHES INTO THE AREA. OTHERWISE... ABOVE
NORMAL TEMPERATURES WILL CONTINUE.

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL INFORMATION.

In the hours before

Special weather statement, Jun 11, 2:32 PM CDT, 9 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, 2:41 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
241 PM CDT SAT JUN 11 2011

ARZ029-112015-
SEBASTIAN AR-
241 PM CDT SAT JUN 11 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 315 PM CDT
FOR THE FOLLOWING COUNTY...

IN WEST CENTRAL ARKANSAS
     SOUTHWESTERN SEBASTIAN

AT 242 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES SOUTHWEST
OF PATTERSON...MOVING EAST AT 10 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...LIBERTY...PATTERSON...HARTFORD...
ARKOLA...HUNTINGTON...MIDLAND AND MANSFIELD.

THIS STORM WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH.
RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE SIGNIFICANT
WEATHER ADVISORY IS UPGRADED TO A WARNING.

LAT...LON 3495 9429 3494 9435 3495 9436 3494 9438
      3494 9441 3493 9444 3506 9444 3513 9427
      3501 9422 3497 9422
TIME...MOT...LOC 1942Z 250DEG 8KT 3497 9443

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 7:08 PM CDTSpecial Weather StatementTSAOsage37 min
Jun 10, 7:20 PM CDTSevere Thunderstorm WarningTSAOsage55 min
Jun 10, 8:37 PM CDTSpecial Weather StatementTSACreek53 min
Jun 10, 9:38 PM CDTSpecial Weather StatementTSACreek37 min
Jun 11, 2:20 PM CDTSevere Thunderstorm WarningTSALeFlore40 min
Jun 11, 2:32 PM CDTSpecial Weather StatementTSAHaskell28 min
Jun 11, 2:58 PM CDTSpecial Weather StatementTSAHaskell47 min
Jun 11, 2:59 PM CDTSpecial Weather StatementTSALeFlore46 min
Jun 11, 3:46 PM CDTSpecial Weather StatementTSALeFlore, Sequoyah44 min
Jun 11, 4:10 PM CDTSpecial Weather StatementTSAHaskell35 min
Jun 11, 4:17 PM CDTSevere Thunderstorm WarningTSAHaskell, Latimer, LeFlore58 min
Jun 11, 4:59 PM CDTSpecial Weather StatementTSAPittsburg46 min
Jun 11, 5:03 PM CDTSpecial Weather StatementTSAOkfuskee27 min
Jun 11, 5:24 PM CDTAreal Flood AdvisoryTSALeFlore3 hr
Jun 11, 5:26 PM CDTAreal Flood AdvisoryTSAHaskell2 hr
Jun 11, 3:12 PM CDTSpecial Weather StatementTSASebastian33 min
Jun 11, 4:57 PM CDTSpecial Weather StatementTSACrawford48 min
Jun 11, 6:20 PM CDTSpecial Weather StatementTSAMadison25 min
Jun 11, 6:28 PM CDTSevere Thunderstorm WarningTSAMadison, Washington47 min

Nearby

Special Weather Statements in Arkansas, 2011Every 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.