Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 423, NWS Tulsa, OK

June 20, 20119 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jun 20, 2011, 11:32 PM CDT for 9 counties in Oklahoma. It was in force for 73 min. 9 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: Jun 20, 2011, 11:32 PM CDT (04:32 UTC)
Expired: Jun 21, 2011, 12:45 AM CDT
In force: 73 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Cherokee County, OK, Craig County, OK, Delaware County, OK, Mayes County, OK, Nowata County, OK, Ottawa County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 60 km from the middle of the area, began a volume at 04:35 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.

What was reported inside it

Time	Report	Where	Remark
Jun 20, 11:39 PM CDT	TSTM WND DMG	3 Ssw Broken Arrow, OK	LARGE TREE LIMBS DOWN...FIREWORKS TENT PARTIALLY COLLAPSED NEAR 111TH AND OLIVE
Jun 20, 11:45 PM CDT	TSTM WND DMG	Pryor, OK	LARGE TREE LIMBS DOWN GREATER THAN 2 INCHES IN DIAMETER, TREE BLOWN OVER ONTO HOUSE.
Jun 20, 11:47 PM CDT	TSTM WND DMG	Vinita, OK	LARGE TREE LIMBS DOWN IN ROADWAY
Jun 21, 12:00 AM CDT	TSTM WND DMG	3 W Locust Grove, OK	LARGE TREE LIMBS DOWN, GREATER THAN 2 INCHES IN DIAMETER, LARGE TREE BLOCKING ROAD, SENIC 412.
Jun 21, 12:11 AM CDT	TSTM WND GST 60	4 Sw Vinita, OK
Jun 21, 12:15 AM CDT	TSTM WND DMG	5 Se Welch, OK	POWER POLE AND NUMEROUS LARGE TREE LIMBS BLOWN DOWN IN COMMUNITY OF BLUE JACKET.
Jun 21, 12:29 AM CDT	TSTM WND DMG	3 W Adair, OK	ONE POWER POLE SNAPPED AND THREE LEANING OVER
Jun 21, 12:30 AM CDT	TSTM WND DMG	Miami, OK	STADIUM LIGHT POLE BLOWN OVER AND KNOCKED OVER SEVERAL OTHER LIGHT POLES. A TREE THAT WAS BLOWN OVER TOOK OUT POWER LINES.
Jun 21, 12:52 AM CDT	TSTM WND GST 65	Bluejacket, OK	ESTIMATED WIND GUST OF 65 MPH WITH 6 TO 12 INCH DIAMETER TREE LIMBS BROKEN/DOWNED. 1 POWER POLE BROKEN AND 1 HOME STRUCK BY LIGHTNING.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 8 storm reports to this severe thunderstorm warning; the first came 7 minutes after it went out.

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
Jun 20, 9:46 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 4.5 hours before the alert went out and 118 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: 1571 J/kg
Mixed-layer CIN: -216 J/kg
Mixed-layer LCL: 1749 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 109 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.

176 
WUUS54 KTSA 210432
SVRTSA
OKC021-035-041-097-105-115-131-143-145-210545-
/O.NEW.KTSA.SV.W.0423.110621T0432Z-110621T0545Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1132 PM CDT MON JUN 20 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA
  CRAIG COUNTY IN NORTHEAST OKLAHOMA
  DELAWARE COUNTY IN NORTHEAST OKLAHOMA
  MAYES COUNTY IN NORTHEAST OKLAHOMA
  SOUTHEASTERN NOWATA COUNTY IN NORTHEAST OKLAHOMA
  OTTAWA COUNTY IN NORTHEAST OKLAHOMA
  ROGERS COUNTY IN NORTHEAST OKLAHOMA
  EASTERN TULSA COUNTY IN NORTHEAST OKLAHOMA
  NORTHERN WAGONER COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 1245 AM CDT

* AT 1130 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NOWATA TO 4 MILES WEST OF FOYIL TO 3 MILES WEST OF
  ONETA...MOVING EAST AT 55 MPH.

  STORM HAZARDS INCLUDE...
  QUARTER SIZE HAIL...
  DAMAGING WIND GUSTS TO 70 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  ONETA...COWETA...FOYIL...TIAWAH...NEW ALLUWE...CHELSEA...INOLA...
  WAGONER...WHITE OAK...ADAIR...PRYOR...BIG CABIN...CHOUTEAU...
  VINITA...PENSACOLA...WELCH...BLUEJACKET...SALINA...LOCUST GROVE...
  PEGGS...LANGLEY...KETCHUM...DISNEY...SPAVINAW...AFTON...CLEORA...
  NARCISSA...BERNICE...CHLOETA...ROSE...MIAMI...COMMERCE...
  FAIRLAND...PICHER...LEACH...QUAPAW...OAKS...GROVE...TWIN OAKS...
  WYANDOTTE...JAY...KANSAS...I-44 NEAR MILE MARKER 0 AND COLCORD.

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 235 AND 324.

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 3700 9461 3649 9462 3622 9457 3616 9472
      3616 9480 3613 9480 3595 9522 3589 9587
      3640 9569 3678 9571 3701 9533 3700 9462
TIME...MOT...LOC 0432Z 250DEG 48KT 3673 9558 3644 9557
          3601 9572

$$

3 follow-up statements

886 
WWUS54 KTSA 210447
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1147 PM CDT MON JUN 20 2011

OKC021-035-041-097-105-115-131-143-145-210545-
/O.CON.KTSA.SV.W.0423.000000T0000Z-110621T0545Z/
CHEROKEE OK-CRAIG OK-DELAWARE OK-MAYES OK-NOWATA OK-OTTAWA OK-
ROGERS OK-TULSA OK-WAGONER OK-
1147 PM CDT MON JUN 20 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR NORTHERN WAGONER...EASTERN TULSA...ROGERS...OTTAWA...SOUTHEASTERN
NOWATA...MAYES...DELAWARE...CRAIG AND NORTHERN CHEROKEE COUNTIES...

AT 1144 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM HOLLOW TO NEW ALLUWE TO TIAWAH TO LEONARD...MOVING
NORTHEAST AT 55 MPH.

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

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...HOLLOW...
COWETA...INOLA...WHITE OAK...PRYOR...ADAIR...PYRAMID CORNERS...BIG
CABIN...WELCH...VINITA...CHOUTEAU...WAGONER...BLUEJACKET...MAZIE...
PENSACOLA...STRANG...SNOWDALE STATE PARK...SALINA...CHEROKEE STATE
PARK...MURPHY...LANGLEY...NARCISSA...SPAVINAW STATE PARK...KETCHUM...
AFTON...COMMERCE...DISNEY LITTLE BLUE STATE PARK...CARDIN...
SPAVINAW...DISNEY...MIAMI...LOST CITY...LOCUST GROVE...PICHER...
CLEORA...BERNICE...QUAPAW...CHLOETA...BERNICE STATE PARK...PEGGS...
FAIRLAND...OTTAWA...TWIN BRIDGES STATE PARK...ROSE...ZENA...
WYANDOTTE...PEORIA...HONEY CREEK STATE PARK...GROVE...I-44 NEAR MILE
MARKER 0...LEACH...JAY...OAKS...TWIN OAKS...TIFF CITY...KANSAS...LAKE
EUCHA STATE PARK AND COLCORD.

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 235 AND 324.

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 3700 9461 3649 9462 3622 9457 3616 9472
      3616 9480 3613 9480 3595 9522 3589 9587
      3640 9569 3678 9571 3701 9533 3700 9462
TIME...MOT...LOC 0447Z 246DEG 49KT 3691 9529 3667 9537
          3622 9553 3596 9571

$$

129 
WWUS54 KTSA 210504
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1204 AM CDT TUE JUN 21 2011

OKC105-143-210513-
/O.CAN.KTSA.SV.W.0423.000000T0000Z-110621T0545Z/
NOWATA OK-TULSA OK-
1204 AM CDT TUE JUN 21 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN TULSA AND SOUTHEASTERN
NOWATA COUNTIES IS CANCELLED...

LAT...LON 3700 9461 3649 9462 3622 9457 3616 9472
      3616 9480 3613 9480 3595 9522 3592 9576
      3640 9569 3660 9543 3700 9533
TIME...MOT...LOC 0503Z 238DEG 37KT 3678 9513 3646 9529
          3613 9558

$$

OKC021-035-041-097-115-131-145-210545-
/O.CON.KTSA.SV.W.0423.000000T0000Z-110621T0545Z/
CHEROKEE OK-CRAIG OK-DELAWARE OK-MAYES OK-OTTAWA OK-ROGERS OK-
WAGONER OK-
1204 AM CDT TUE JUN 21 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR NORTHERN WAGONER...ROGERS...OTTAWA...MAYES...DELAWARE...CRAIG AND
NORTHERN CHEROKEE COUNTIES...

AT 1202 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM PYRAMID CORNERS TO ADAIR TO INOLA...MOVING NORTHEAST 
AT 40 MPH. THE STRONGEST PORTION OF THIS LINE WAS LOCATED OVER CRAIG 
COUNTY.

STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
DAMAGING WIND GUSTS TO 70 MPH...

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 238 AND 324.

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 3700 9461 3649 9462 3622 9457 3616 9472
      3616 9480 3613 9480 3595 9522 3592 9576
      3640 9569 3660 9543 3700 9533
TIME...MOT...LOC 0503Z 238DEG 37KT 3678 9513 3646 9529
          3613 9558

$$

531 
WWUS54 KTSA 210524
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1224 AM CDT TUE JUN 21 2011

OKC021-145-210534-
/O.CAN.KTSA.SV.W.0423.000000T0000Z-110621T0545Z/
CHEROKEE OK-WAGONER OK-
1224 AM CDT TUE JUN 21 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN WAGONER AND NORTHERN
CHEROKEE COUNTIES IS CANCELLED...

LAT...LON 3649 9462 3622 9457 3616 9472 3617 9498
      3616 9503 3616 9512 3614 9511 3608 9534
      3615 9549 3640 9569 3660 9543 3700 9533
      3700 9461
TIME...MOT...LOC 0524Z 238DEG 37KT 3698 9478 3652 9498
          3628 9541

$$

OKC035-041-097-115-131-210545-
/O.CON.KTSA.SV.W.0423.000000T0000Z-110621T0545Z/
CRAIG OK-DELAWARE OK-MAYES OK-OTTAWA OK-ROGERS OK-
1224 AM CDT TUE JUN 21 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR EASTERN ROGERS...OTTAWA...MAYES...DELAWARE AND CRAIG COUNTIES...

AT 1220 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM QUAPAW TO DISNEY TO 6 MILES EAST OF TIAWAH...MOVING 
NORTHEAST AT 45 MPH.

STORM HAZARDS INCLUDE...
HALF DOLLAR SIZE HAIL...
WIND GUSTS TO 60 MPH...

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 248 AND 324.

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 3649 9462 3622 9457 3616 9472 3617 9498
      3616 9503 3616 9512 3614 9511 3608 9534
      3615 9549 3640 9569 3660 9543 3700 9533
      3700 9461
TIME...MOT...LOC 0524Z 238DEG 37KT 3698 9478 3652 9498
          3628 9541

$$

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 Jun 20, 9:20 PM CDT, 2 hours 12 minutes earlier.

Area forecast discussion, Jun 20, 9:20 PM CDT, 2 hours 12 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
920 PM CDT MON JUN 20 2011

.DISCUSSION...
A QUICK UPDATE WAS MADE TO REMOVE AFTERNOON WORDING AND ALSO TO
RAMP UP POPS AHEAD OF THE SQUALL LINE. NO OTHER CHANGES MADE AT
THIS TIME.

LACY

&&

.PREV DISCUSSION... /ISSUED 649 PM CDT MON JUN 20 2011/

UPDATE...

A QUICK UPDATE WAS MADE TO THE POPS FOR THIS EVENING BASED ON
LATEST RADAR TRENDS. SEE DISCUSSION BELOW.

DISCUSSION...
PACIFIC FRONT IS SLOWLY OVERTAKING THE DRYLINE FROM NORTH TO SOUTH
OVER NORTH CENTRAL OK ATTM. STORMS ARE FIRING BASICALLY IN A
CONTINUOUS LINE THAT IS BUILDING SOUTH WITH TIME. GIVEN THE BETTER
EXPECTED COVERAGE OF STORMS AS THIS LINE MOVES INTO NORTHEAST
OK...I HAVE INCREASED THE EVENING POPS INTO THE 60-80% RANGE. WILL
CONTINUE TO MONITOR AND ADJUST IF NEEDED AS THE EVENING CONTINUES.
A WIND GUST TO 63 KTS WAS RECORDED AT MID CONTINENT AIRPORT WITH
THE LINE...SO DAMAGING WINDS AND POSSIBLY AN ISOLATED SPIN UP
TORNADO REMAIN POSSIBLE LATER THIS EVENING.

LACY

PREV DISCUSSION... /ISSUED 345 PM CDT MON JUN 20 2011/

DISCUSSION...
STRONG MID JUNE UPPER LOW NOW OVER WESTERN KANSAS WILL SUPPLY AN
INCREASINGLY STRONG SOURCE OF LIFT ACROSS THE REGION THIS EVENING
AND OVERNIGHT. DRYLINE CURRENTLY LOCATED WEST OF INTERSTATE 35
WILL BE THE FOCUS FOR INITIAL STORM DEVELOPMENT...WITH THE SYSTEM
COLD FRONT OVERTAKING THE DRYLINE LATER TONIGHT AS THE UPPER LOW
LIFTS NORTHEASTWARD. 18Z KOUN SOUNDING SHOWED LIMITED COOLING YET
TO OCCUR AROUND THE 700MB LEVEL...AND THE LATEST RUC FORECAST
MAINTAINS THIS WARM LAYER WELL INTO THE EVENING ACROSS EASTERN
OKLAHOMA WHICH IS MUCH DIFFERENT THAN THE LATEST NAM SOLUTION.
RESULTANT IMPACT IS A GREATER UNCERTAINTY IN COVERAGE WITH THE
INITIAL STORM DEVELOPMENT ALONG THE DRYLINE. THAT SAID...THE
CONDITIONAL SEVERE RISK IS HIGH GIVEN AMPLE INSTABILITY AND
UNSEASONABLY STRONG WINDS WIND PROFILES. FORECAST HODOGRAPHS AND
ANTICIPATED STORM MOTIONS FAVOR CELLS QUICKLY EVOLVING INTO BROKEN
LINE SEGMENTS...AND DEEP SUB CLOUD LAYERS WILL FAVOR INTENSE
DOWNBURST WINDS. NUMEROUS LOCAL WRF RUNS HAVE CONSISTENTLY SHOW
THE POTENTIAL INTENSE WIND DAMAGE WITH THE EVENING STORMS.

AS THE COLD FRONT OVERTAKES THE DRYLINE THIS EVENING...STORM
COVERAGE IS EXPECTED TO INCREASE WITH A CONTINUED RISK OF LARGE
HAIL AND DOWNBURST WINDS WITH THE STRONGEST CORES. AN EVOLUTION
INTO A LARGER MCS IS LIKELY WITH THE STORMS EXPANDING QUICKLY
AHEAD OF THE COLD FRONT AND CLEARING THE FORECAST AREA BY SUNRISE
TUESDAY.

THE ACTUAL COLD FRONT WILL BE SLOWER TO TRACK ACROSS THE AREA AND
MAY SERVE AS A FOCUS FOR TUESDAY AFTERNOON STORMS...THOUGH THE MCS
OUTFLOW WILL HAVE POTENTIAL TO SHOVE THE STORM COVERAGE EVEN
FURTHER SOUTH THAN CURRENTLY FORECAST. SHOULD STORMS
DEVELOP...STRONG INSTABILITY WOULD SUPPORT A RISK OF ISOLATED
SEVERE WEATHER. WEDNESDAY APPEARS THE BEST SHOT OF A DRY DAY FOR
ALL LOCATIONS ALONG WITH COOLER TEMPERATURES AND DRIER DEWPOINTS.

THE TEMPERATURES TRENDS FROM RECENT FORECAST WERE LARGELY RETAINED
WITH THIS FORECAST PACKAGE.

THE FRONTAL BOUNDARY WILL BEGIN TO SLOWLY MOVE NORTHWARD FROM LATE
WEEK INTO THE WEEKEND. THIS WILL BE BENEATH SOME DEGREE OF
NORTHWESTERLY FLOW ALOFT...WHICH WILL FAVOR REPEATED MCS ACTIVITY
LIKELY IN VICINITY. NORTHEASTERN PORTIONS OF THE FORECAST AREA
APPEAR MOST LIKELY TO THESE MCS TRACKS THUS SLIGHTLY HIGHER POPS.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   69  90  66  91 /  70  10  10  10
FSM   71  88  69  90 /  70  40  40  10
MLC   70  88  67  91 /  70  20  20  10
BVO   67  89  63  90 /  80  10  10  10
FYV   68  85  63  86 /  70  30  30  10
BYV   68  85  64  86 /  70  30  30  10
MKO   70  88  66  90 /  70  20  20  10
MIO   67  87  64  87 /  60  10  10  10
F10   70  89  66  90 /  60  20  20  10
HHW   71  89  70  90 /  60  30  30  10

&&

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

LONG TERM....30

Hazardous weather outlook, Jun 20, 7:40 PM CDT, 3 hours 52 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
740 PM CDT MON JUN 20 2011

ARZ001-002-010-011-019-020-029-OKZ049-053>076-211000-
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-
740 PM CDT MON JUN 20 2011

...SIGNIFICANT SEVERE WEATHER POSSIBLE THIS EVENING AND OVERNIGHT...

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

.DAY ONE...THIS EVENING AND OVERNIGHT.
TORNADO.
	RISK...LIMITED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...EARLY THIS EVENING EASTERN OKLAHOMA...LATE TONIGHT
                FOR NORTHWEST ARKANSAS.

SEVERE THUNDERSTORM.
	RISK...SIGNIFICANT.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...LATE THIS AFTERNOON.

	AREA AT GREATEST RISK...NORTHEAST OKLAHOMA EARLY THIS EVENING.
                                SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS
                                AFTER MIDNIGHT.

FLASH FLOOD.
	RISK...LIMITED.
	AREA...SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS.
	ONSET...AFTER MIDNIGHT.

HEAVY RAIN.
	RISK...LIMITED.
	AREA...SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS.
	ONSET...AFTER MIDNIGHT.

DISCUSSION...

A STRONGER THAN NORMAL LOW PRESSURE SYSTEM FOR THIS TIME OF
YEAR OVER WESTERN KANSAS WILL LIFT NORTHEAST INTO NEBRASKA BY
TUESDAY MORNING. AN ASSOCIATED DRYLINE AND PACIFIC COLD FRONT WILL
SWEEP EAST ACROSS OKLAHOMA THIS EVENING AND OVERNIGHT. A LINE OF SCATTERED
STRONG TO SEVERE THUNDERSTORMS IS EXPECTED TO SWEEP EAST ACROSS
NORTHEAST OKLAHOMA LATER THIS EVENING. OTHER MORE DISCREET CELLS
AHEAD OF THE LINE MAY AFFECT PORTIONS OF EASTERN OKLAHOMA AS WELL.
LARGE HAIL TO HALF DOLLAR SIZE AND DAMAGING WINDS IN EXCESS OF 70 MPH
ARE POSSIBLE WITH THE LINE...WHILE VERY LARGE HAIL TO BASEBALL SIZE AND
LOCALLY DAMAGING WINDS ARE POSSIBLE WITH THE DISCREET CELLS. ISOLATED
TORNADOES WILL BE POSSIBLE WITH THE DISCREET CELLS...AND LATER ON TONIGHT
WITH THE LINE AS LOW LEVEL SHEAR INCREASES.

ANOTHER ROUND OF STORMS IS EXPECTED TO DEVELOP LATE THIS EVENING
ALONG THE PACIFIC FRONT AS IT GRADUALLY OVERTAKES THE DRYLINE OVER
CENTRAL OR SOUTH CENTRAL OKLAHOMA. STORMS ARE EXPECTED TO QUICKLY
ORGANIZE INTO A SQUALL LINE AND SWEEP EAST ACROSS EAST CENTRAL OR
SOUTHEAST OKLAHOMA INTO NORTHWEST ARKANSAS AFTER MIDNIGHT
TONIGHT. THERE IS POTENTIAL FOR A WIDESPREAD SWATH OF DAMAGING
WINDS IN EXCESS OF 70 MPH IF THIS WERE TO OCCUR. THERE IS ALSO A
SMALL RISK OF TORNADOES ALONG THE SQUALL LINE IF IT CAN REMAIN
INTENSE INTO THE EARLY MORNING HOURS.

LOCALLY HEAVY RAINFALL IS POSSIBLE WITH THE EXPECTED LATE NIGHT
STORM COMPLEX...HOWEVER WIDESPREAD FLOODING RAINS ARE NOT EXPECTED.

WINDS WILL GUST BETWEEN 30 AND 40 MPH ACROSS PORTIONS OF EASTERN
OKLAHOMA THROUGH AROUND SUNSET THIS EVENING.

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

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
TUESDAY...SEVERE THUNDERSTORM POTENTIAL...HIGH WIND POTENTIAL.
WEDNESDAY...NO HAZARDS.
THURSDAY THROUGH SUNDAY...THUNDERSTORM POTENTIAL.

EXTENDED DISCUSSION...

SCATTERED STRONG TO SEVERE STORMS ARE EXPECTED TO DEVELOP TUESDAY
AFTERNOON ALONG THE SLOW MOVING PACIFIC FRONT FROM NORTHWEST
ARKANSAS DOWN INTO SOUTHEAST OKLAHOMA. VERY LARGE HAIL AND
DAMAGING WINDS WILL BE THE PRIMARY HAZARDS.

A NORTHWEST FLOW PATTERN WILL DEVELOP FOR THE LATTER PART OF THE
WEEK AND INTO THE WEEKEND. SEVERAL ROUNDS OF THUNDERSTORMS ARE
POSSIBLE...MAINLY IN THE FORM OF COMPLEXES MOVING SOUTHEAST FROM
THE HIGH PLAINS. DAMAGING WINDS WOULD BE THE PRIMARY HAZARD.

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

In the hours before

Special weather statement, Jun 20, 11:05 PM CDT, 27 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1105 PM CDT MON JUN 20 2011

OKZ066-210430-
OKMULGEE OK-
1105 PM CDT MON JUN 20 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 1130 PM CDT
FOR THE FOLLOWING COUNTY...

IN NORTHEAST OKLAHOMA
     NORTHERN OKMULGEE

AT 1105 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES NORTH OF
BEGGS...MOVING EAST AT 30 MPH. SOME LOCATIONS THAT WILL BE AFFECTED
BY THIS STORM INCLUDE...PRESTON...BEGGS...BALD HILL AND HECTORVILLE.

THIS STORM WILL BE CAPABLE OF PRODUCING NICKEL SIZE HAIL AND 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 3586 9606 3585 9577 3565 9577 3565 9614
      3585 9615
TIME...MOT...LOC 0405Z 271DEG 27KT 3580 9609

Local storm report, Jun 20, 11:06 PM CDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1106 PM CDT MON JUN 20 2011

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

1100 PM     HAIL             5 NE SAPULPA            36.05N 96.05W
06/20/2011  E1.00 INCH       CREEK              OK   TRAINED SPOTTER

            QUARTER SIZED HAIL IN PRATTVILLE.

&&

AJ

Local storm report, Jun 20, 11:11 PM CDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1111 PM CDT MON JUN 20 2011

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

1110 PM     HAIL             SPERRY                  36.30N 95.99W
06/20/2011  E0.88 INCH       TULSA              OK   EMERGENCY MNGR

            NICKEL HAIL IN SPERRY.

&&

AJ

Special weather statement, Jun 20, 11:13 PM CDT, 19 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1113 PM CDT MON JUN 20 2011

OKZ056-057-210445-
CRAIG OK-NOWATA OK-
1113 PM CDT MON JUN 20 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 NORTHEAST OKLAHOMA
     NORTHWESTERN CRAIG AND NOWATA

AT 1114 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 5 MILES NORTHWEST
OF WATOVA...MOVING NORTHEAST AT 50 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...NOWATA...DELAWARE...LENAPAH...WATOVA
AND SOUTH COFFEYVILLE.

THIS STORM WILL BE CAPABLE OF PRODUCING NICKEL SIZE HAIL AND 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 3700 9514 3660 9568 3660 9572 3663 9581
      3665 9581 3700 9566
TIME...MOT...LOC 0414Z 225DEG 45KT 3668 9571

Local storm report, Jun 20, 11:15 PM CDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1115 PM CDT MON JUN 20 2011

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

1046 PM     HAIL             MANNFORD                36.13N 96.35W
06/20/2011  E1.50 INCH       CREEK              OK   TRAINED SPOTTER

            PING PONG BALL SIZED HAIL COVERING THE GROUND IN
            MANNFORD, BROKE WINDSHIELD ON CAR.

&&

AJ

Local storm report, Jun 20, 11:18 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1118 PM CDT MON JUN 20 2011

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

1116 PM     HAIL             OWASSO                  36.27N 95.85W
06/20/2011  E0.25 INCH       TULSA              OK   BROADCAST MEDIA

            PEA HAIL IN OWASSO AT 96TH STREET AND GARNETT.

&&

AJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 8:09 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	96 min
Jun 20, 8:51 PM CDT	Severe Thunderstorm Warning	TSA	Osage	54 min
Jun 20, 9:18 PM CDT	Special Weather Statement	TSA	Osage, Pawnee, Washington	42 min
Jun 20, 9:20 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	55 min
Jun 20, 9:51 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Tulsa, Washington	54 min
Jun 20, 10:03 PM CDT	Special Weather Statement	TSA	Creek, Tulsa	42 min
Jun 20, 10:09 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee, Tulsa	81 min
Jun 20, 10:22 PM CDT	Special Weather Statement	TSA	Craig, Nowata	23 min
Jun 20, 10:39 PM CDT	Special Weather Statement	TSA	Okfuskee	36 min
Jun 20, 10:44 PM CDT	Special Weather Statement	TSA	Nowata, Washington	31 min
Jun 20, 10:49 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Rogers, Tulsa, Wagoner	71 min
Jun 20, 11:05 PM CDT	Special Weather Statement	TSA	Okmulgee	25 min
Jun 20, 11:13 PM CDT	Special Weather Statement	TSA	Nowata	32 min
Jun 20, 11:40 PM CDT	Special Weather Statement	TSA	Creek	35 min
Jun 20, 11:57 PM CDT	Special Weather Statement	TSA	McIntosh, Muskogee	33 min
Jun 21, 12:19 AM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	41 min
Jun 21, 12:39 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Ottawa	66 min
Jun 21, 12:49 AM CDT	Special Weather Statement	TSA	Craig	26 min
Jun 21, 1:03 AM CDT	Special Weather Statement	TSA	Cherokee	27 min
Jun 21, 6:21 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	39 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.