Alert archive / Arkansas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 261, NWS Tulsa, OK

September 7, 2012Franklin County, Sebastian County, Arkansas; LeFlore County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Sep 7, 2012, 6:37 PM CDT for Franklin County, Sebastian County, Arkansas; LeFlore County, Oklahoma. It was in force for 38 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 7, 2012, 6:37 PM CDT (23:37 UTC)
Expired: Sep 7, 2012, 7:15 PM CDT
In force: 38 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Franklin County, AR, Sebastian County, AR, LeFlore County, OK

What was reported inside it

Time	Report	Where	Remark
Sep 7, 6:40 PM CDT	TSTM WND DMG	Cameron, OK	TREE LIMBS REPORTED DOWN IN CAMERON. RELAYED BY MEDIA.
Sep 7, 6:45 PM CDT	TSTM WND DMG	Charleston, AR	8 INCH DIAMETER TREE DOWN. NUMEROUS 3-4 INCH DIAMETER LIMBS DOWN IN TOWN.
Sep 7, 6:55 PM CDT	TSTM WND DMG	5 S Meg, AR	TREES DOWN ALONG HIGHWAY 23 NEAR ETNA. ESTIMATED 60 MPH GUSTS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 7, 2:35 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.6 hours before the alert went out and 188 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: 1095 J/kg
Mixed-layer CIN: -182 J/kg
Mixed-layer LCL: 1368 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 256 m²/s²
0-3 km storm-relative helicity: 257 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.9

Open this sounding in Storm Lab

The text

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

667 
WUUS54 KTSA 072337
SVRTSA
ARC047-131-OKC079-080015-
/O.NEW.KTSA.SV.W.0261.120907T2337Z-120908T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
637 PM CDT FRI SEP 7 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN LE FLORE COUNTY IN SOUTHEAST OKLAHOMA
  SOUTHERN FRANKLIN COUNTY IN WEST CENTRAL ARKANSAS
  SEBASTIAN COUNTY IN WEST CENTRAL ARKANSAS

* UNTIL 715 PM CDT

* AT 631 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 10 MILES NORTH OF BRANCH TO 3 MILES SOUTHEAST OF
  BARLING TO 5 MILES WEST OF MIDLAND TO 4 MILES NORTHEAST OF
  FANSHAWE...MOVING SOUTHEAST AT 45 MPH. THESE STORMS HAVE A HISTORY 
  OF PRODUCING WIND DAMAGE...WITH A REPORT OF TREES DOWN IN POTEAU  
AT AROUND 625 PM.

  STORM HAZARDS INCLUDE...
  DAMAGING WIND GUSTS TO 70 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  BLOOMER...WISTER...LAKE WISTER STATE PARK...BURNVILLE...HARTFORD...
  HUNTINGTON...CHARLESTON...OZARK...HOWE...MANSFIELD...BRANCH...
  WIEDERKEHR VILLAGE...FORT CHAFFEE...WASHBURN...ALTUS...DENNING...
  HEAVENER RUNESTONE STATE PARK AND HEAVENER.

THIS INCLUDES INTERSTATE 40 IN ARKANSAS BETWEEN MILE MARKERS 24 AND
33.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3536 9372 3540 9380 3532 9381 3522 9402
      3513 9404 3514 9413 3507 9423 3496 9424
      3492 9444 3474 9445 3494 9496 3507 9492
      3516 9462 3543 9436 3538 9435 3538 9415
      3544 9416 3546 9403 3556 9402 3548 9370
TIME...MOT...LOC 2335Z 293DEG 40KT 3543 9397 3527 9422
          3506 9439 3497 9481

$$

1 follow-up statement

116 
WWUS54 KTSA 080010
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
710 PM CDT FRI SEP 7 2012

ARC047-131-OKC079-080020-
/O.EXP.KTSA.SV.W.0261.000000T0000Z-120908T0015Z/
FRANKLIN AR-SEBASTIAN AR-LE FLORE OK-
710 PM CDT FRI SEP 7 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN LE FLORE...SEBASTIAN
AND SOUTHERN FRANKLIN COUNTIES EXPIRES AT 715 PM CDT...

THE LINE OF THUNDERSTORMS WHICH PROMPTED THE WARNING HAS MOVED OUT 
OF THE WARNED AREA...THEREFORE THE SEVERE THUNDERSTORM WARNING WILL 
BE ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM.

LAT...LON 3536 9372 3540 9380 3532 9381 3522 9402
      3513 9404 3514 9413 3507 9423 3496 9424
      3492 9444 3474 9445 3494 9496 3507 9492
      3516 9462 3543 9436 3538 9435 3538 9415
      3544 9416 3546 9403 3556 9402 3548 9370
TIME...MOT...LOC 0010Z 293DEG 40KT 3527 9353 3511 9378
          3491 9395 3482 9437

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 6, 7:01 PM CDT	Severe Thunderstorm Warning	TSA	Madison	44 min
Sep 6, 7:32 PM CDT	Severe Thunderstorm Warning	TSA	Carroll, Madison	43 min
Sep 6, 8:06 PM CDT	Special Weather Statement	TSA	Carroll	39 min
Sep 6, 8:13 PM CDT	Severe Thunderstorm Warning	TSA	Carroll	32 min
Sep 7, 4:09 PM CDT	Severe Thunderstorm Warning	TSA	Benton	51 min
Sep 7, 4:39 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Madison	51 min
Sep 7, 5:01 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Crawford, Madison, Washington	59 min
Sep 7, 5:39 PM CDT	Severe Thunderstorm Warning	TSA	Carroll, Crawford, Franklin, Madison, Washington	51 min
Sep 7, 5:55 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian	65 min
Sep 7, 3:22 AM CDT	Wind Advisory	TSA	Craig, Creek, Delaware, Mayes, Nowata, Okfuskee and 7 more	17 hr
Sep 7, 2:49 PM CDT	Special Weather Statement	TSA	Nowata, Osage, Washington	41 min
Sep 7, 2:53 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata, Rogers, Washington	67 min
Sep 7, 3:01 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata	44 min
Sep 7, 3:32 PM CDT	Special Weather Statement	TSA	Wagoner	28 min
Sep 7, 3:40 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Ottawa	50 min
Sep 7, 3:46 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Rogers	44 min
Sep 7, 3:47 PM CDT	Red Flag Warning	TSA	Cherokee, Haskell, Latimer, McIntosh, Mayes, Muskogee and 3 more	4 hr
Sep 7, 3:54 PM CDT	Special Weather Statement	TSA	Creek, Okfuskee	51 min
Sep 7, 3:58 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee, Wagoner	17 min
Sep 7, 4:04 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee	56 min
Sep 7, 4:25 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Ottawa	35 min
Sep 7, 4:36 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Mayes, Muskogee, Okmulgee, Wagoner	39 min
Sep 7, 4:53 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okmulgee, Wagoner	52 min
Sep 7, 5:30 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, McIntosh, Muskogee, Pittsburg, Sequoyah	60 min
Sep 7, 6:21 PM CDT	Special Weather Statement	TSA	Latimer	24 min
Sep 7, 6:56 PM CDT	Special Weather Statement	TSA	LeFlore	34 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2012 Severe Thunderstorm Warnings in Oklahoma, 2012 Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.