Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 368, NWS Tulsa, OK

July 20, 2009Cherokee County, Mayes County, Wagoner County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 20, 2009, 8:27 PM CDT for Cherokee County, Mayes County, Wagoner County, Oklahoma. It was in force for 35 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: Jul 20, 2009, 8:27 PM CDT (01:27 UTC)
Expired: Jul 20, 2009, 9:02 PM CDT
In force: 35 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Cherokee County, OK, Mayes County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 32 km from the middle of the area, began a volume at 01:28 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 1.5 hours before the alert went out and 149 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: 300 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 953 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: 37 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.

000 
WUUS54 KTSA 210127
SVRTSA
OKC021-097-145-210230-
/O.NEW.KTSA.SV.W.0368.090721T0127Z-090721T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
827 PM CDT MON JUL 20 2009

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA
  SOUTHERN MAYES COUNTY IN NORTHEAST OKLAHOMA
  NORTHEASTERN WAGONER COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 930 PM CDT

* AT 826 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL AND WINDS
  TO 60 MPH. THIS STORM WAS LOCATED NEAR LOCUST GROVE AND WAS NEARLY
  STATIONARY.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...LOCUST GROVE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3628 9512 3604 9512 3604 9535 3628 9535
TIME...MOT...LOC 0127Z 206DEG 1KT 3614 9521

$$

2 follow-up statements

000 
WWUS54 KTSA 210144
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
844 PM CDT MON JUL 20 2009

OKC021-097-145-210230-
/O.CON.KTSA.SV.W.0368.000000T0000Z-090721T0230Z/
WAGONER OK-CHEROKEE OK-MAYES OK-
844 PM CDT MON JUL 20 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR SOUTHERN MAYES...NORTHWESTERN CHEROKEE AND NORTHEASTERN WAGONER
COUNTIES...

AT 843 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL
AND WINDS TO 60 MPH. THIS STORM WAS LOCATED NEAR MURPHY AND WAS
NEARLY STATIONARY.

SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...LOCUST GROVE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3628 9512 3604 9512 3604 9535 3628 9535
TIME...MOT...LOC 0144Z 206DEG 1KT 3614 9521

$$

000 
WWUS54 KTSA 210202
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
902 PM CDT MON JUL 20 2009

OKC021-097-145-210212-
/O.CAN.KTSA.SV.W.0368.000000T0000Z-090721T0230Z/
WAGONER OK-CHEROKEE OK-MAYES OK-
902 PM CDT MON JUL 20 2009

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN MAYES...NORTHWESTERN
CHEROKEE AND NORTHEASTERN WAGONER COUNTIES IS CANCELLED...

THE THUNDERSTORM HAS WEAKENED BELOW SEVERE LIMITS...THEREFORE THE
SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 4 AM.

LAT...LON 3628 9512 3604 9512 3604 9535 3628 9535
TIME...MOT...LOC 0202Z 206DEG 1KT 3614 9521

$$

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 Jul 20, 8:00 PM CDT, 27 minutes earlier.

Area forecast discussion, Jul 20, 8:00 PM CDT, 27 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
800 PM CDT MON JUL 20 2009

.DISCUSSION...
EVOLUTION OF THUNDERSTORM DEVELOPMENT UNDER WAY. MANY DIFFERENT
LOW LEVEL BOUNDARIES TRIGGERING ISOLATED THUNDERSTORMS AHEAD OF
THE BIGGER EVENT THAT WILL MOVE INTO NORTHEAST OKLAHOMA FROM
KANSAS AROUND OR AFTER MIDNIGHT. FORECAST CURRENTLY LOOKS VERY
GOOD AND DO NOT PLAN ON ANY CHANGES SO WILL NOT ISSUE UPDATE
THIS EVENING.

&&

.PREV DISCUSSION... /ISSUED 609 PM CDT MON JUL 20 2009/

..AVIATION...

DISCUSSION...
ISOLATED THUNDERSTORMS WILL BE POSSIBLE NEAR ANY TAF SITE THIS
EVENING. THUNDERSTORMS WITH STRONG GUSTY WINDS AND HAIL OR HEAVY
RAINFALL WILL INCREASE FROM NORTH TO SOUTH DURING THE EVENING AND
CONTINUE AREAWIDE OVERNIGHT. A COLD FRONT WITH AN ASSOCIATED WIND
SHIFT WILL ENTER THE REGION FROM THE NORTH EARLY TUESDAY MORNING.

&&

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

SHORT TERM...06
LONG TERM....15

Hazardous weather outlook, Jul 20, 4:55 PM CDT, 3 hours 32 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
455 PM CDT MON JUL 20 2009

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-
420 PM CDT MON JUL 20 2009

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

.DAY ONE...TONIGHT.

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

FLASH FLOOD.
RISK...LIMITED.
AREA...NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS.
ONSET...ONGOING.

HEAVY RAIN.
RISK...LIMITED.
AREA...NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS.
ONSET...ONGOING.

DANGEROUS HEAT.
RISK...LIMITED.
AREA...SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS.
ONSET...ONGOING...ENDING AT SUNSET.

DISCUSSION...
SCATTERED SHOWERS AND THUNDERSTORMS DEVELOPED THIS AFTERNOON OVER
PARTS OF NORTHWEST ARKANSAS WITH SOME LOCALLY HEAVY RAIN OF AROUND
2 INCHES. THE SHOWERS AND THUNDERSTORMS WILL CONTINUE THIS EVENING
IN THE VICINITY OF OUTFLOW BOUNDARIES AND A WEAK FRONTAL BOUNDARY
THAT IS CURRENTLY SET UP ACROSS NORTHWEST ARKANSAS. ANY OF THESE
STORMS COULD BECOME STRONG TO SEVERE AS THE AIRMASS CONTINUES TO
BE UNSTABLE. LARGE HAIL...HEAVY RAIN AND STRONG GUSTY WINDS ARE
THE MAIN CONCERNS.

HEAT INDEX VALUES WERE HOVERING AROUND 100 DEGREES OVER MOST OF
SOUTHEAST OKLAHOMA AND WILL REMAIN NEAR THESE VALUES UNTIL SUNSET.

ADDITIONAL THUNDERSTORMS ARE EXPECTED LATER TONIGHT AS A THUNDERSTORM
COMPLEX DEVELOPS ACROSS KANSAS AND MOVES INTO THE AREA. SEVERE
THUNDERSTORMS WILL BE POSSIBLE ALONG THE LEADING EDGE OF THIS
COMPLEX WITH STRONG WINDS THE PRIMARY CONCERN. HEAVY RAIN WILL ALSO
BE POSSIBLE AS THE THUNDERSTORM COMPLEX ROLLS ACROSS THE REGION.

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

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
TUESDAY...THUNDERSTORM POTENTIAL...HEAVY RAIN POTENTIAL.
WEDNESDAY THROUGH FRIDAY...NO HAZARDS.
SATURDAY AND SUNDAY...THUNDERSTORM POTENTIAL.

EXTENDED DISCUSSION...
STRONG THUNDERSTORMS WITH HEAVY RAIN AND THE POTENTIAL TO PRODUCE
SEVERE WEATHER WILL LIKELY BE ONGOING TUESDAY MORNING.  HOWEVER...THE
EXPECTED THUNDERSTORM COMPLEX WILL DIMINISH AND MOVE OUT OF THE
AREA AS THE MORNING PROGRESSES.  THUNDERSTORM CHANCES WILL
END BY LATE TUESDAY AFTERNOON.

WEAK HIGH PRESSURE WILL DOMINATE DURING THE  REMAINDER OF THE
WORK WEEK.  BELOW NORMAL TEMPERATURES WILL GRADUALLY WARM TO SEASONAL
LEVELS BEFORE THE NEXT FRONT ARRIVES LATE SATURDAY OR SUNDAY BRINGING
THE NEXT CHANCE OF RAIN.

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

In the hours before

Special weather statement, Jul 20, 3:11 PM CDT, 5 hours 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
311 PM CDT MON JUL 20 2009

ARZ001-010-011-202045-
BENTON AR-MADISON AR-WASHINGTON AR-
311 PM CDT MON JUL 20 2009

...SIGNIFICANT WEATHER ALERT...CORRECTED FOR DUPLICATE WORDING...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 345 PM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHWEST ARKANSAS
     NORTHEASTERN WASHINGTON...SOUTHEASTERN BENTON AND NORTHWESTERN
     MADISON

AT 302 PM CDT...DOPPLER RADAR INDICATED A CLUSTER OF STRONG
THUNDERSTORMS IN EASTERN WASHINGTON AND NORTHWEST MADISON COUNTIES
IN ARKANSAS. A COUPLE OF THE LARGER STORMS WERE LOCATED JUST EAST OF
FAYETTEVILLE AND JUST NORTH OF MAYFIELD. STORM MOVEMENT WAS SOMEWHAT
ERRATIC AT GENERALLY LESS THAN 5 MILES HOUR. THIS WILL LEAD TO
LOCALLY HEAVY RAINFALL IN EXCESS OF TWO INCHES...IN LESS THAN AN
HOURS TIME...IN PARTS OF EASTERN WASHINGTON COUNTY AND NORTHWEST
MADISON COUNTY.

THESE STORMS WILL ALSO BE CAPABLE OF PRODUCING SMALL HAIL AND GUSTY
WINDS TO 40 MPH. RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN
CASE THE SIGNIFICANT WEATHER ALERT IS UPGRADED TO A SEVERE THUNDERSTORM
OR FLASH FLOOD WARNING.

LAT...LON 3624 9379 3597 9402 3603 9416 3625 9406
TIME...MOT...LOC 2002Z 129DEG 3KT 3625 9403 3606 9413

Special weather statement, Jul 20, 3:44 PM CDT, 4 hours 43 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
344 PM CDT MON JUL 20 2009

ARZ001-202130-
BENTON AR-
344 PM CDT MON JUL 20 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 430 PM CDT
FOR THE FOLLOWING COUNTY...

IN NORTHWEST ARKANSAS
     CENTRAL BENTON

AT 340 PM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 2 MILES
SOUTHEAST OF VAUGHN...MOVING SLOWLY NORTHEAST. OTHER THUNDERSTORMS
WERE ALSO FORMING OVER THE NORTHEAST HALF OF BENTON COUNTY.
SOME LOCATIONS THAT MAY BE AFFECTED BY THESE STORMS INCLUDE...ROCKY
COMFORT...MILLER...HILL TOP...BENTONVILLE...ROGERS...PEA
RIDGE...HEALING SPRINGS...CAVE SPRINGS...VAUGHN...CENTERTON...AVOCA
AND BELLA VISTA.

THESE STORMS WILL BE CAPABLE OF PRODUCING LOCAL RAINFALL AMOUNTS
IN EXCESS OF 2 INCHES IN AN HOURS TIME.  SMALL HAIL AND WIND GUSTS
TO 40 MPH WILL ALSO BE POSSIBLE. RESIDENTS IN THESE AREAS SHOULD REMAIN
ALERT IN CASE THE SIGNIFICANT WEATHER ALERT IS UPGRADED TO A
FLASH FLOOD WARNING.

LAT...LON 3650 9393 3621 9422 3621 9434 3650 9429
TIME...MOT...LOC 2040Z 211DEG 4KT 3630 9427

Special weather statement, Jul 20, 6:22 PM CDT, 2 hours 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
622 PM CDT MON JUL 20 2009

OKZ072-202345-
SEQUOYAH OK-
622 PM CDT MON JUL 20 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 645 PM CDT
FOR THE FOLLOWING COUNTY...

IN EAST CENTRAL OKLAHOMA
     SOUTHEASTERN SEQUOYAH

AT 622 PM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
MULDROW...MOVING NORTHWEST AT 5 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...COTTONWOOD...MULDROW AND ROLAND.

THIS STORM WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO
40 MPH.

LAT...LON 3555 9455 3539 9447 3533 9464 3546 9475
TIME...MOT...LOC 2322Z 148DEG 5KT 3542 9462

Special weather statement, Jul 20, 7:38 PM CDT, 49 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
738 PM CDT MON JUL 20 2009

OKZ068-070-210115-
CHEROKEE OK-MUSKOGEE OK-
738 PM CDT MON JUL 20 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 815 PM CDT
FOR THE FOLLOWING COUNTIES...

IN EAST CENTRAL OKLAHOMA
     NORTHEASTERN MUSKOGEE AND SOUTHERN CHEROKEE

AT 738 PM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
CHEROKEE COUNTY...MOVING NORTHWEST AT 10 MPH..

THIS STORM WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO
40 MPH.

LAT...LON 3576 9501 3570 9506 3577 9518 3583 9514
TIME...MOT...LOC 0038Z 121DEG 9KT 3576 9509

Special weather statement, Jul 20, 7:44 PM CDT, 43 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
744 PM CDT MON JUL 20 2009

OKZ062-210115-
MAYES OK-
744 PM CDT MON JUL 20 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 815 PM CDT
FOR THE FOLLOWING COUNTY...

IN NORTHEAST OKLAHOMA
     CENTRAL MAYES

AT 744 PM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 4 MILES
SOUTHEAST OF PRYOR...MOVING NORTH AT 10 MPH. SOME LOCATIONS THAT WILL
BE AFFECTED BY THIS STORM INCLUDE...PRYOR.

THIS STORM WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO
40 MPH.

LAT...LON 3634 9537 3639 9521 3623 9518 3619 9530
TIME...MOT...LOC 0044Z 167DEG 9KT 3627 9525

Special weather statement, Jul 20, 8:16 PM CDT, 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
816 PM CDT MON JUL 20 2009

OKZ062-068-210145-
CHEROKEE OK-MAYES OK-
816 PM CDT MON JUL 20 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 845 PM CDT
FOR THE FOLLOWING COUNTIES...

IN EAST CENTRAL OKLAHOMA
     NORTHERN CHEROKEE

IN NORTHEAST OKLAHOMA
     CENTRAL MAYES

AT 816 PM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 2 MILES
NORTHEAST OF MURPHY...MOVING SOUTH AT 5 MPH. SOME LOCATIONS THAT WILL
BE AFFECTED BY THIS STORM INCLUDE...PEGGS...PRYOR...MAZIE...MURPHY...
CHOUTEAU...LOCUST GROVE AND SALINA.

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

LAT...LON 3641 9506 3607 9505 3608 9539 3641 9537
TIME...MOT...LOC 0116Z 007DEG 3KT 3616 9522

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 7:38 PM CDT	Special Weather Statement	TSA	Cherokee	37 min
Jul 20, 7:44 PM CDT	Special Weather Statement	TSA	Mayes	31 min
Jul 20, 8:06 PM CDT	Areal Flood Advisory	TSA	Mayes	54 min
Jul 20, 8:16 PM CDT	Special Weather Statement	TSA	Mayes	29 min
Jul 20, 9:04 PM CDT	Special Weather Statement	TSA	Delaware	26 min
Jul 20, 9:20 PM CDT	Severe Thunderstorm Warning	TSA	Delaware	40 min
Jul 21, 12:25 AM CDT	Severe Thunderstorm Warning	TSA	Osage	95 min
Jul 21, 12:55 AM CDT	Severe Thunderstorm Warning	TSA	Osage	65 min
Jul 21, 1:27 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee, Washington	63 min
Jul 21, 2:20 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Nowata, Osage, Pawnee, Rogers, Tulsa and 2 more	74 min
Jul 21, 3:20 AM CDT	Special Weather Statement	TSA	Creek, Mayes, Okmulgee, Rogers, Tulsa, Wagoner	70 min
Jul 21, 4:13 AM CDT	Special Weather Statement	TSA	Adair, Cherokee, Delaware, McIntosh, Muskogee, Okmulgee and 1 more	77 min
Jul 21, 4:35 AM CDT	Special Weather Statement	TSA	Nowata	55 min
Jul 21, 5:12 AM CDT	Special Weather Statement	TSA	Adair, Haskell, Sequoyah	48 min
Jul 21, 5:35 AM CDT	Special Weather Statement	TSA	Nowata	55 min
Jul 21, 6:07 AM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, Sequoyah	53 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2009 Every severe thunderstorm warning in 2009

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.