Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 511, NWS Tulsa, OK

August 12, 2011Adair County, Oklahoma; Washington County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 12, 2011, 2:43 PM CDT for Adair County, Oklahoma; Washington County, Arkansas. It was in force for 22 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: Aug 12, 2011, 2:43 PM CDT (19:43 UTC)
Expired: Aug 12, 2011, 3:05 PM CDT
In force: 22 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Washington County, AR, Adair County, OK

The radar

The Western Arkansas radar (KSRX), 81 km from the middle of the area, began a volume at 19:46 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 116 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: 196 J/kg
Mixed-layer CIN: -283 J/kg
Mixed-layer LCL: 1165 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 146 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

169 
WUUS54 KTSA 121943
SVRTSA
ARC143-OKC001-122030-
/O.NEW.KTSA.SV.W.0511.110812T1943Z-110812T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
243 PM CDT FRI AUG 12 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN ADAIR COUNTY IN NORTHEAST OKLAHOMA
  WESTERN WASHINGTON COUNTY IN NORTHWEST ARKANSAS

* UNTIL 330 PM CDT

* AT 242 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR WESTVILLE...
  MOVING SOUTHEAST AT 40 MPH.

  STORM HAZARDS INCLUDE...
  WIND GUSTS TO 60 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  CINCINNATI...WESTVILLE...BARON...STILWELL...LINCOLN AND PRAIRIE
  GROVE.

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 3591 9422 3577 9462 3616 9478 3613 9456
      3610 9455 3610 9447
TIME...MOT...LOC 1943Z 320DEG 33KT 3602 9457

$$

2 follow-up statements

307 
WWUS54 KTSA 121952
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
252 PM CDT FRI AUG 12 2011

ARC143-OKC001-122030-
/O.CON.KTSA.SV.W.0511.000000T0000Z-110812T2030Z/
WASHINGTON AR-ADAIR OK-
252 PM CDT FRI AUG 12 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR
EASTERN ADAIR AND WESTERN WASHINGTON COUNTIES...

AT 250 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR CINCINNATI...
MOVING SOUTHEAST AT 40 MPH.

STORM HAZARDS INCLUDE...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...RHEA...
LINCOLN...PRAIRIE GROVE...CANEHILL...CLYDE...MORROW AND HOGEYE.

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 3591 9422 3581 9451 3612 9465 3613 9456
      3610 9455 3610 9447
TIME...MOT...LOC 1953Z 320DEG 33KT 3599 9449

$$

222 
WWUS54 KTSA 122005
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
305 PM CDT FRI AUG 12 2011

ARC143-OKC001-122015-
/O.CAN.KTSA.SV.W.0511.000000T0000Z-110812T2030Z/
WASHINGTON AR-ADAIR OK-
305 PM CDT FRI AUG 12 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN ADAIR AND WESTERN
WASHINGTON COUNTIES IS CANCELLED...

THE THUNDERSTORM HAS MOVED OUT OF THE WARNED AREA AND WEAKENED BELOW
SEVERE LIMITS...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.

LAT...LON 3591 9422 3581 9451 3612 9465 3613 9456
      3610 9455 3610 9447
TIME...MOT...LOC 2005Z 320DEG 33KT 3587 9445

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 3:25 AM CDT	Heat Advisory	TSA	Adair, Cherokee, Choctaw, Craig, Creek, Delaware and 15 more	16 hr
Aug 12, 8:00 AM CDT	Special Weather Statement	TSA	Osage	30 min
Aug 12, 11:22 AM CDT	Severe Thunderstorm Warning	TSA	Osage	21 min
Aug 12, 11:54 AM CDT	Special Weather Statement	TSA	Mayes	36 min
Aug 12, 12:11 PM CDT	Special Weather Statement	TSA	Mayes	34 min
Aug 12, 12:50 PM CDT	Areal Flood Advisory	TSA	Delaware, Mayes, Rogers	115 min
Aug 12, 12:56 PM CDT	Special Weather Statement	TSA	Mayes, Rogers	64 min
Aug 12, 1:22 PM CDT	Flash Flood Warning	TSA	Mayes, Rogers	2 hr
Aug 12, 1:40 PM CDT	Special Weather Statement	TSA	Mayes, Rogers	65 min
Aug 12, 3:06 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	44 min
Aug 12, 3:23 PM CDT	Special Weather Statement	TSA	Muskogee	52 min
Aug 12, 3:45 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Nowata, Rogers	60 min
Aug 12, 4:12 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Nowata, Rogers	63 min
Aug 12, 4:33 PM CDT	Severe Thunderstorm Warning	TSA	Delaware	27 min
Aug 12, 4:34 PM CDT	Special Weather Statement	TSA	Cherokee, Tulsa, Wagoner	41 min
Aug 12, 5:01 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Delaware, Mayes, Rogers, Wagoner	59 min
Aug 12, 5:14 PM CDT	Flash Flood Warning	TSA	Mayes, Rogers	4 hr
Aug 12, 5:45 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Muskogee, Sequoyah, Wagoner	60 min
Aug 12, 6:39 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Haskell, Muskogee, Sequoyah	14 min
Aug 12, 6:47 PM CDT	Special Weather Statement	TSA	Sequoyah	28 min
Aug 12, 6:49 PM CDT	Special Weather Statement	TSA	Okfuskee	26 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2011 Severe Thunderstorm Warnings in Arkansas, 2011 Every severe thunderstorm warning 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.