Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 153, NWS Tulsa, OK

April 23, 2011Adair County, Cherokee County, Delaware County, Oklahoma; Benton County, Washington County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 23, 2011, 10:57 PM CDT for Adair County, Cherokee County, Delaware County, Oklahoma; Benton County, Washington County, Arkansas. It was in force for 63 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: Apr 23, 2011, 10:57 PM CDT (03:57 UTC)
Expired: Apr 24, 2011, 12:00 AM CDT
In force: 63 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Benton County, AR, Washington County, AR, Adair County, OK, Cherokee County, OK, Delaware County, OK

The radar

The Western Arkansas radar (KSRX), 92 km from the middle of the area, began a volume at 03:58 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 23, 9:53 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 23, 5:38 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 4.0 hours before the alert went out and 100 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 747 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 283 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

592 
WUUS54 KTSA 240357
SVRTSA
ARC007-143-OKC001-021-041-240500-
/O.NEW.KTSA.SV.W.0153.110424T0357Z-110424T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1057 PM CDT SAT APR 23 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA
  ADAIR COUNTY IN NORTHEAST OKLAHOMA
  SOUTHEASTERN DELAWARE COUNTY IN NORTHEAST OKLAHOMA
  BENTON COUNTY IN NORTHWEST ARKANSAS
  WASHINGTON COUNTY IN NORTHWEST ARKANSAS

* UNTIL MIDNIGHT CDT

* AT 1053 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR MARIETTA...
  MOVING NORTHEAST AT 35 MPH. ANOTHER SEVERE THUNDERSTORM WAS        
  LOCATED JUST NORTHEAST OF TAHLEQUAH...MOVING NORTHEAST AT 35 MPH.

  STORM HAZARDS INCLUDE...
  QUARTER SIZE HAIL...
  WIND GUSTS TO 60 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...BARON...
  KANSAS...WESTVILLE...WATTS...CINCINNATI...COLCORD...LINCOLN...WEST
  SILOAM SPRINGS...SILOAM SPRINGS...PRAIRIE GROVE...GENTRY...WEST
  FORK...FARMINGTON...SPRINGTOWN...DECATUR...GREENLAND...HIGHFILL...
  GRAVETTE...FAYETTEVILLE...TONTITOWN...CAVE SPRINGS...ELKINS...
  HIWASSE...SPRINGDALE...LOWELL...GARFIELD...BELLA VISTA...WAR
  EAGLE...GATEWAY...PEA RIDGE...ROGERS AND BENTONVILLE.

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 3597 9396 3573 9465 3601 9508 3650 9448
      3650 9386
TIME...MOT...LOC 0357Z 237DEG 31KT 3586 9461

$$

5 follow-up statements

066 
WWUS54 KTSA 240410
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1110 PM CDT SAT APR 23 2011

ARC007-143-OKC001-021-041-240500-
/O.CON.KTSA.SV.W.0153.000000T0000Z-110424T0500Z/
WASHINGTON AR-BENTON AR-DELAWARE OK-ADAIR OK-CHEROKEE OK-
1110 PM CDT SAT APR 23 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT
FOR EASTERN CHEROKEE...ADAIR...SOUTHEASTERN DELAWARE...BENTON AND
WASHINGTON COUNTIES...

AT 1107 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR 
MORROW...MOVING NORTHEAST AT 30 MPH. ANOTHER SEVERE THUNDERSTORM WAS 
LOCATED JUST NORTHEAST OF FAYETTEVILLE...MOVING NORTHEAST AT 35 MPH.

STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE... 
WESTVILLE...MORROW...WATTS...SUMMERS...CINCINNATI...WEST SILOAM 
SPRINGS...LINCOLN...SILOAM SPRINGS...WEDINGTON...GENTRY...PRAIRIE 
GROVE...DECATUR...SAVOY...WALNUT GROVE...WEST FORK... 
FARMINGTON...GRAVETTE...HIGHFILL...FAYETTEVILLE...GOSHEN...
SPRINGDALE...BELLA VISTA...HIWASSE...AVOCA...CENTERTON...PEA 
RIDGE...LOWELL...ROGERS...BENTONVILLE...AND WALNUT HILL.

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 3597 9396 3573 9466 3604 9489 3650 9448
      3650 9387
TIME...MOT...LOC 0408Z 246DEG 25KT 3587 9452

$$

893 
WWUS54 KTSA 240420
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1120 PM CDT SAT APR 23 2011

OKC021-041-240429-
/O.CAN.KTSA.SV.W.0153.000000T0000Z-110424T0500Z/
DELAWARE OK-CHEROKEE OK-
1120 PM CDT SAT APR 23 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CHEROKEE AND
SOUTHEASTERN DELAWARE COUNTIES IS CANCELLED...

LAT...LON 3597 9396 3573 9466 3605 9471 3617 9461
      3617 9456 3621 9457 3649 9433 3650 9387
TIME...MOT...LOC 0419Z 246DEG 25KT 3590 9443

$$

ARC007-143-OKC001-240500-
/O.CON.KTSA.SV.W.0153.000000T0000Z-110424T0500Z/
WASHINGTON AR-BENTON AR-ADAIR OK-
1120 PM CDT SAT APR 23 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT
FOR EASTERN ADAIR...BENTON AND WASHINGTON COUNTIES...

AT 1116 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR MORROW...
MOVING NORTHEAST AT 30 MPH.

STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
LINCOLN...SILOAM SPRINGS...WEDINGTON...GENTRY...PRAIRIE GROVE...WEST 
FORK...FARMINGTON...HIGHFILL...TONTITOWN...FAYETTEVILLE...
GOSHEN...SPRINGDALE...BELLA VISTA...HIWASSE...AVOCA...CENTERTON... 
PEA RIDGE...LOWELL...ROGERS...BENTONVILLE...AND WALNUT HILL.

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 3597 9396 3573 9466 3605 9471 3617 9461
      3617 9456 3621 9457 3649 9433 3650 9387
TIME...MOT...LOC 0419Z 246DEG 25KT 3590 9443

$$

556 
WWUS54 KTSA 240433
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1133 PM CDT SAT APR 23 2011

OKC001-240442-
/O.CAN.KTSA.SV.W.0153.000000T0000Z-110424T0500Z/
ADAIR OK-
1133 PM CDT SAT APR 23 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN ADAIR COUNTY IS
CANCELLED...

LAT...LON 3597 9396 3579 9450 3617 9456 3649 9414
      3650 9387
TIME...MOT...LOC 0432Z 250DEG 27KT 3590 9430

$$

ARC007-143-240500-
/O.CON.KTSA.SV.W.0153.000000T0000Z-110424T0500Z/
WASHINGTON AR-BENTON AR-
1133 PM CDT SAT APR 23 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT
FOR BENTON AND WASHINGTON COUNTIES...

AT 1130 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR HOGEYE...
MOVING EAST AT 30 MPH.

STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
SAVOY...HIGHFILL...FARMINGTON...WEST FORK...TONTITOWN...
FAYETTEVILLE...CENTERTON...JOHNSON...GOSHEN...SPRINGDALE...
PEA RIDGE...LOWELL...ROGERS...BENTONVILLE...AND WALNUT HILL.

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 3597 9396 3579 9450 3617 9456 3649 9414
      3650 9387
TIME...MOT...LOC 0432Z 250DEG 27KT 3590 9430

$$

998 
WWUS54 KTSA 240442
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1142 PM CDT SAT APR 23 2011

ARC007-240452-
/O.CAN.KTSA.SV.W.0153.000000T0000Z-110424T0500Z/
BENTON AR-
1142 PM CDT SAT APR 23 2011

...THE SEVERE THUNDERSTORM WARNING FOR BENTON COUNTY IS CANCELLED...

LAT...LON 3606 9395 3602 9395 3597 9396 3583 9439
      3604 9441 3621 9405 3621 9401 3624 9400
      3624 9392
TIME...MOT...LOC 0442Z 248DEG 39KT 3592 9416

$$

ARC143-240500-
/O.CON.KTSA.SV.W.0153.000000T0000Z-110424T0500Z/
WASHINGTON AR-
1142 PM CDT SAT APR 23 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT
FOR WASHINGTON COUNTY...

AT 1139 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR WEST FORK...
MOVING EAST AT 45 MPH.

STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
GREENLAND...FAYETTEVILLE...JOHNSON...BLACK OAK...HICKS...SHADY
GROVE...SULPHUR CITY...ELKINS...SONORA...TUTTLE...GOSHEN AND
MAYFIELD.

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 3606 9395 3602 9395 3597 9396 3583 9439
      3604 9441 3621 9405 3621 9401 3624 9400
      3624 9392
TIME...MOT...LOC 0442Z 248DEG 39KT 3592 9416

$$

461 
WWUS54 KTSA 240456
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1156 PM CDT SAT APR 23 2011

ARC143-240506-
/O.EXP.KTSA.SV.W.0153.000000T0000Z-110424T0500Z/
WASHINGTON AR-
1156 PM CDT SAT APR 23 2011

...THE SEVERE THUNDERSTORM WARNING FOR WASHINGTON COUNTY EXPIRES AT
MIDNIGHT CDT...

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

GUSTY WINDS...SMALL HAIL AND HEAVY RAIN WILL STILL BE POSSIBLE AS 
OTHER STORMS MOVE NORTHEAST INTO THE AREA.

LAT...LON 3606 9395 3602 9395 3597 9396 3583 9439
      3604 9441 3621 9405 3621 9401 3624 9400
      3624 9392
TIME...MOT...LOC 0456Z 248DEG 39KT 3598 9399

$$

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 Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 23, 8:54 PM CDT, 2 hours 3 minutes earlier.

Area forecast discussion, Apr 23, 8:54 PM CDT, 2 hours 3 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
854 PM CDT SAT APR 23 2011

...UPDATE...

.DISCUSSION...

MAIN CHANGE TO THE FORECAST WAS TO INCREASE POPS ACROSS SOUTHEAST
OKLAHOMA OVERNIGHT. STRONG TO SEVERE CONVECTION HAS DEVELOPED IN
THE WARM SECTOR ACROSS NORTH TEXAS...AND IS BEGINNING TO MOVE INTO
SOUTHERN OKLAHOMA AS FORECAST. LARGE HAIL WILL BE THE PRIMARY
THREAT WITH THESE STORMS...BUT AN ISOLATED DAMAGING WIND OR
TORNADO REPORT WOULD BE POSSIBLE.

FLOODING ALREADY BECOMING A PROBLEM ACROSS NORTHWEST
ARKANSAS...ESPECIALLY PORTIONS OF CARROLL COUNTY. EXPECT THAT THIS
AREA WILL CONTINUE TO SEE THE BRUNT OF THE HEAVY RAIN LATE TONIGHT
AS DEPICTED IN THE QPF GRIDS...ALTHOUGH A BRIEF RESPITE WILL OCCUR
LATE THIS EVENING.

TWEAKS WERE MADE TO DEW POINT GRIDS ACCORDING TO CURRENT TRENDS.

UPDATED PRODUCTS ALREADY OUT.

&&

.PREV DISCUSSION... /ISSUED 549 PM CDT SAT APR 23 2011/

AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM.

STATIONARY FRONT REMAINS ACROSS THE AREA...WITH CONVECTION ONGOING
ACROSS NW AR JUST N OF THE BNDRY. ADDITIONAL THUNDERSTORMS
DEVELOPING IN N TX THAT WILL MOVE NEWRD AND AFFECT MLC/FSM AFTER
00Z. S/WV WILL MOVE INTO E OK AFTER 06Z THAT WILL DRAMATICALLY
INCR AREAL COVERAGE OF STORMS...AND BRING A PROLONGED PERIOD OF
TSRA TO THE TERMINALS. NW AR TERMINALS WILL SEE TSRA FOR MUCH OF
THE VALID TAF PERIOD. MVFR CIGS/VSBYS SHOULD PREVAIL FOR MUCH OF
THE PERIOD AT ALL SITES...WITH IFR CONDS LIKELY IN HEAVIER
STORMS...ESPECIALLY FYV/XNA. ADDITIONAL STORMS WILL DEVELOP ALONG
THE BNDRY AFTER 18Z TOMORROW.

PREV DISCUSSION... /ISSUED 332 PM CDT SAT APR 23 2011/

DISCUSSION...
THUNDERSTORMS MOVED NORTHEAST OUT OF THE AREA EARLY THIS AFTERNOON...
JUST IN TIME FOR THE NEXT ROUND OF CONVECTION TO BEGIN. THE LATEST
IN A SERIES OF UPPER DISTURBANCES WILL MOVE ACROSS THE REGION IN
CONJUNCTION WITH AFTERNOON HEATING SOUTH OF A STATIONARY FRONT.
THIS IS EXPECTED TO INITIATE ANOTHER ROUND OF SEVERE CONVECTION
THIS AFTERNOON INTO THIS EVENING ACROSS THE SOUTHEAST PORTION OF
THE CWA. IN ADDITION... MORE WIDESPREAD STRONG ELEVATED
THUNDERSTORMS WITH HEAVY RAINFALL ARE EXPECTED TO TRACK
NORTHEASTWARD GENERALLY ALONG AND NORTH OF THE FRONT OVERNIGHT.
WITH GENERALLY SLOW MOVEMENT AND TRAINING OF CELLS... FLASH
FLOODING MAY BECOME A CONCERN AND WILL ISSUE A WATCH FOR MUCH OF
THE AREA SHORTLY.

THE SURFACE FRONT IS EXPECTED TO REMAIN RELATIVELY STATIONARY ACROSS
THE REGION FOR THE NEXT FEW DAYS. PERSISTENT SOUTHWEST UPPER FLOW
CONTAINING A SERIES OF DISTURBANCES WILL INTERACT WITH A GOOD SUPPLY
OF LOW LEVEL MOISTURE TO KEEP CHANCES FOR HEAVY RAINFALL IN THE
FORECAST. TO COMPLICATE ISSUES... IT APPEARS THAT A DEEPER UPPER
TROUGH FOLLOWED BY AN UPPER LOW WILL TRAVERSE THE REGION BEFORE THE
PATTERN CHANGES. HEALTHY RAINFALL TOTALS OVER 5 INCHES COULD BE SEEN
IN SOME LOCATIONS OVER THE NEXT SEVERAL DAYS... DEPENDING ON THE
VARYING POSITION OF THE FRONT.

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...FLASH FLOOD WATCH UNTIL 7 PM MONDAY FOR OKZ055-OKZ056-OKZ057-
     OKZ058-OKZ060-OKZ061-OKZ062-OKZ063-OKZ066-OKZ067-OKZ068-
     OKZ069-OKZ070-OKZ071-OKZ072-OKZ074.

AR...FLASH FLOOD WATCH UNTIL 7 PM MONDAY FOR ARZ001-ARZ002-ARZ010-
     ARZ011-ARZ019-ARZ020-ARZ029.

&&

SHORT TERM...22

Hazardous weather outlook, Apr 23, 5:15 PM CDT, 5 hours 42 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
515 PM CDT SAT APR 23 2011

ARZ001-002-010-011-019-020-029-OKZ049-053>076-241000-
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-
515 PM CDT SAT APR 23 2011

...PERIODS OF SEVERE THUNDERSTORMS AND HEAVY RAIFNALL EXPECTED THROUGH
THE WEEKEND...

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

.DAY ONE...LATE AFTERNOON THROUGH TONIGHT.

TORNADO.
	RISK...LIMITED.
	AREA...SOUTHEAST OKLAHOMA INTO NORTHWEST ARKANSAS.
	ONSET...AFTER 6 PM.

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

FLASH FLOOD.
	RISK...SIGNIFICANT.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...ONGOING.

        AREA AT GREATEST RISK...NORTHEAST OKLAHOMA AND NORTHWEST
        ARKANSAS.

HEAVY RAIN.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
        ONSET...ONGOING.

DISCUSSION...
A STATIONARY FRONT ARCED FROM FAR NORTHERN ARKANSAS...WEST CENTRAL
ARKANSAS AND INTO FAR NORTHERN TEXAS LATE THIS AFTERNOON. SCATTERED
THUNDERSTORMS MAINLY NORTH OF THIS BOUNDARY WILL POSE A THREAT OF
LARGE HAIL ACROSS PARTS OF FAR EASTERN OKLAHOMA AND NORTHWEST
ARKANSAS INTO THE EARLY EVENING.

ADDITIONAL THUNDERSTORMS DEVELOPING NEAR THE SURFACE BOUNDARY ACROSS
NORTHERN TEXAS WILL MOVE INTO SOUTHEAST OKLAHOMA BY EARLY THIS
EVENING AND EVENTUALLY INTO NORTHWEST ARKANSAS DURING THE EVENING HOURS.
SHEAR AND INSTABILITY ARE SUFFICIENT TO SUPPORT CLUSTERS OF SEVERE
THUNDERSTORMS AND POSSIBLY A FEW SUPERCELLS. LARGE HAIL WILL BE THE
PRIMARY SEVERE WEATHER THREAT...ALTHOUGH A LIMITED TORNADO THREAT
EXISTS INTO THE EVENING...ESPECIALLY NEAR THE SURFACE BOUNDARY.

AS THE LOW-LEVEL JET STRENGTHENS TONIGHT...AREAS OF SHOWERS AND
THUNDERSTORMS WILL DEVELOP NORTH OF THE FRONT...PRIMARILY ACROSS
NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS. LARGE HAIL WILL BE
POSSIBLE WITH A FEW OF THE STORMS...WITH THE THREAT OF HEAVY
RAINFALL AND POSSIBLE FLASH FLOODING INCREASING LATE TONIGHT. SOME
LOCATIONS MAY RECEIVE ANOTHER 2 TO 3 INCHES OF RAIN BY DAYBREAK.

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

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.
SUNDAY AND MONDAY...SEVERE THUNDERSTORM POTENTIAL...HEAVY RAIN
POTENTIAL.
TUESDAY...SEVERE THUNDERSTORM POTENTIAL.
WEDNESDAY...THUNDERSTORM POTENTIAL.
THURSDAY AND FRIDAY...HIGH WIND POTENTIAL.

EXTENDED DISCUSSION...
AN UNSETTLED WEATHER PATTERN WILL CONTINUE THROUGH THE MIDDLE OF
NEXT WEEK. THE FRONTAL BOUNDARY THAT IS CURRENTLY ACROSS THE AREA
WILL REMAIN NEARLY STATIONARY WHILE THE FLOW ALOFT BECOMES MORE
SOUTHWESTERLY. SEVERAL ROUNDS OF THUNDERSTORMS ARE EXPECTED SUNDAY
INTO MONDAY AS A SERIES OF UPPER LEVEL DISTURBANCES EMBEDDED IN
UPPER FLOW TRAVERSE THE AREA. A POTENT UPPER LEVEL DISTURBANCE WILL
MOVE ACROSS THE AREA MONDAY AFTERNOON AND EVENING ENHANCING THE
THREAT FOR THUNDERSTORMS. AN EVEN MORE SIGNIFICANT UPPER LEVEL
SHORTWAVE WILL MOVE ACROSS THE REGION TUESDAY INTO TUESDAY NIGHT.
THE CHANCES OF THUNDERSTORMS WILL FINALLY COME TO AN END BY
WEDNESDAY AFTERNOON AS THIS LAST SHORTWAVE FINALLY USHERS THE
STALLED BOUNDARY OFF TO THE SOUTH AND EAST.

DURING THIS PERIOD OF UNSETTLED WEATHER...SEVERAL ROUNDS OF SEVERE
THUNDERSTORMS CAN BE EXPECTED. THE MOST SIGNIFICANT BOUTS OF
SEVERE THUNDERSTORMS COULD COME MONDAY AFTERNOON/EVENING AND AGAIN
TUESDAY EVENING. HEAVY RAIN AND THE POTENTIAL FOR FLASH FLOODING
AND RIVER FLOODING WILL BECOME MORE OF A CONCERN SUNDAY AND INTO
EARLY NEXT WEEK AS THE GROUND BECOME MORES SATURATED.

EMERGENCY MANAGEMENT PLANNING STATEMENT...
EMERGENCY MANAGEMENT OFFICIALS SHOULD BE PREPARED FOR THE POTENTIAL
OF SEVERAL ROUNDS OF SEVERE THUNDERSTORMS AND HEAVY RAINS...WHICH
COULD LEAD TO FLASH FLOODING AND POSSIBLY RIVER FLOODING.

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

In the hours before

Local storm report, Apr 23, 10:43 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE
1043 PM CDT SAT APR 23 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1041 PM     HAIL             TULSA                   36.13N 95.92W
04/23/2011  M1.00 INCH       TULSA              OK   BROADCAST MEDIA

            AT KJRH STUDIO.

&&

SFP

Local storm report, Apr 23, 10:46 PM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE
1046 PM CDT SAT APR 23 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1041 PM     HAIL             12 W MUSKOGEE           35.75N 95.58W
04/23/2011  E1.00 INCH       MUSKOGEE           OK   EMERGENCY MNGR

&&

SFP

Local storm report, Apr 23, 10:49 PM CDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1049 PM CDT SAT APR 23 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1045 PM     HAIL             TULSA                   36.13N 95.92W
04/23/2011  M1.50 INCH       TULSA              OK   PUBLIC

            LOCATION 4TH AND HARVARD AND 21ST AND UTICA

&&

MAT

Special weather statement, Apr 23, 10:51 PM CDT, 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1051 PM CDT SAT APR 23 2011

ARZ001-002-010-011-240445-
BENTON AR-CARROLL AR-MADISON AR-WASHINGTON AR-
1051 PM CDT SAT APR 23 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 1145 PM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHWEST ARKANSAS
     WASHINGTON...CARROLL...BENTON AND MADISON

AT 1049 PM CDT...STRONG THUNDERSTORMS WERE LOCATED OVER NORTHERN
WASHINGTON COUNTY NEAR SPRINGDALE...OVER NORTHERN CARROLL COUNTY
NEAR EUREKA SPRINGS...AND OVER CENTRAL MADISON COUNTY NEAR WESLEY.
THE STORMS WERE MOVING NORTHEAST AT 35 MPH.

THESE STORMS WILL BE CAPABLE OF PRODUCING NICKEL SIZE HAIL. RESIDENTS
IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE SIGNIFICANT WEATHER
ADVISORY IS UPGRADED TO A WARNING.

LAT...LON 3612 9340 3612 9346 3609 9346 3608 9343
      3597 9344 3576 9449 3632 9457 3649 9386
      3650 9329
TIME...MOT...LOC 0349Z 240DEG 35KT 3613 9427

Local storm report, Apr 23, 10:54 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1054 PM CDT SAT APR 23 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1052 PM     HAIL             TULSA                   36.13N 95.92W
04/23/2011  M2.50 INCH       TULSA              OK   BROADCAST MEDIA

&&

MAT

Local storm report, Apr 23, 10:55 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE
1055 PM CDT SAT APR 23 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1054 PM     HAIL             SAVOY                   36.11N 94.33W
04/23/2011  E0.75 INCH       WASHINGTON         AR   EMERGENCY MNGR

&&

SFP

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 8:43 PM CDT	River Flood Warning	TSA	Cherokee	4 days
Apr 23, 8:59 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	33 min
Apr 23, 9:18 PM CDT	Special Weather Statement	TSA	Okfuskee	42 min
Apr 23, 9:19 PM CDT	Special Weather Statement	TSA	McIntosh	41 min
Apr 23, 9:42 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee	29 min
Apr 23, 9:44 PM CDT	Special Weather Statement	TSA	Cherokee	46 min
Apr 23, 9:57 PM CDT	Special Weather Statement	TSA	Creek	48 min
Apr 23, 10:13 PM CDT	Special Weather Statement	TSA	Tulsa	47 min
Apr 23, 10:22 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Tulsa	38 min
Apr 23, 10:36 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, Muskogee, Sequoyah	39 min
Apr 23, 10:41 PM CDT	Special Weather Statement	TSA	Muskogee	34 min
Apr 23, 10:50 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	29 min
Apr 23, 11:07 PM CDT	Special Weather Statement	TSA	Creek	53 min
Apr 23, 11:17 PM CDT	Flash Flood Warning	TSA	Adair, Cherokee, McIntosh, Muskogee, Sequoyah, Wagoner	5 hr
Apr 23, 11:32 PM CDT	Wind Advisory	TSA	Choctaw, Haskell, Latimer, Pittsburg, Pushmataha	4 hr
Apr 24, 1:50 AM CDT	Special Weather Statement	TSA	Creek	25 min
Apr 24, 2:23 AM CDT	River Flood Warning	TSA	Cherokee	36 hr
Apr 24, 4:44 AM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	61 min
Apr 24, 5:34 AM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, Pittsburg	41 min
Apr 24, 6:16 AM CDT	Special Weather Statement	TSA	Haskell, Latimer, LeFlore	44 min
Apr 24, 9:12 AM CDT	Areal Flood Advisory	TSA	Adair, Cherokee, Sequoyah	93 min
Apr 24, 3:18 PM CDT	Flash Flood Warning	TSA	Adair, Cherokee, Creek, Delaware, McIntosh, Muskogee and 4 more	6 hr
Apr 24, 4:44 PM CDT	Special Weather Statement	TSA	Pittsburg	31 min
Apr 24, 5:02 PM CDT	Special Weather Statement	TSA	Muskogee	28 min
Apr 24, 5:16 PM CDT	Tornado Warning	TSA	Haskell, Latimer, Pittsburg	44 min
Apr 24, 5:31 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Haskell, Muskogee, Sequoyah	44 min
Apr 24, 5:47 PM CDT	Tornado Warning	TSA	Haskell, LeFlore, Sequoyah	32 min
Apr 24, 5:58 PM CDT	Special Weather Statement	TSA	Osage	47 min
Apr 24, 5:59 PM CDT	Special Weather Statement	TSA	Creek, Tulsa	46 min
Apr 24, 6:05 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore	55 min
Apr 24, 6:11 PM CDT	Special Weather Statement	TSA	Latimer	34 min
Apr 24, 6:13 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	32 min
Apr 24, 6:16 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, Sequoyah	44 min
Apr 24, 6:21 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, Pittsburg	39 min
Apr 24, 6:29 PM CDT	Areal Flood Advisory	TSA	LeFlore, Sequoyah	61 min
Apr 24, 6:42 PM CDT	Special Weather Statement	TSA	Rogers	33 min
Apr 24, 6:48 PM CDT	Flash Flood Warning	TSA	Haskell, Latimer, LeFlore, McIntosh, Muskogee, Pittsburg and 1 more	6 hr
Apr 24, 6:48 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	42 min
Apr 24, 6:50 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	25 min
Apr 24, 6:52 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	53 min
Apr 23, 7:10 PM CDT	Special Weather Statement	TSA	Madison	50 min
Apr 23, 7:27 PM CDT	Severe Thunderstorm Warning	TSA	Madison	43 min
Apr 23, 7:56 PM CDT	Tornado Warning	TSA	Madison	19 min
Apr 23, 10:15 PM CDT	Flash Flood Warning	TSA	Benton, Carroll, Madison, Washington	6 hr
Apr 23, 10:39 PM CDT	River Flood Warning	TSA	Carroll	64 hr
Apr 23, 10:51 PM CDT	Special Weather Statement	TSA	Benton, Carroll, Madison, Washington	54 min
Apr 23, 11:14 PM CDT	Severe Thunderstorm Warning	TSA	Carroll	16 min
Apr 23, 11:50 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Madison, Washington	42 min
Apr 24, 12:16 AM CDT	Special Weather Statement	TSA	Washington	44 min
Apr 24, 3:49 AM CDT	Areal Flood Warning	TSA	Benton, Carroll, Madison, Washington	8 hr
Apr 24, 9:51 AM CDT	Flash Flood Warning	TSA	Benton, Carroll, Crawford, Franklin, Madison, Washington	4 hr
Apr 24, 2:05 PM CDT	Flash Flood Warning	TSA	Benton, Carroll, Madison, Washington	6 hr
Apr 24, 6:24 PM CDT	Special Weather Statement	TSA	Crawford	36 min
Apr 24, 6:54 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin	35 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.