Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 372, NWS Tulsa, OK

July 21, 2009Osage County, Pawnee County, Washington County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 21, 2009, 1:27 AM CDT for Osage County, Pawnee County, Washington County, Oklahoma. It was in force for 63 min. 6 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: Jul 21, 2009, 1:27 AM CDT (06:27 UTC)
Expired: Jul 21, 2009, 2:30 AM CDT
In force: 63 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Osage County, OK, Pawnee County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 119 km from the middle of the area, began a volume at 06:29 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
Jul 21, 1:35 AM CDT	TSTM WND DMG	Shidler, OK	TREE LIMDS DOWN IN SHIDLER.
Jul 21, 2:00 AM CDT	TSTM WND DMG	9 Ne Pawhuska, OK	TREE LIMBS SDOWN AT OSAGE HILLS STATE PARK.
Jul 21, 2:00 AM CDT	TSTM WND GST 70	Pawhuska, OK
Jul 21, 2:11 AM CDT	TSTM WND GST 80	9 Ne Pawhuska, OK	REPORTED NEAR OSAGE HILLS STATE PARK.
Jul 21, 2:25 AM CDT	TSTM WND DMG	Pawnee, OK	TREE LIMBS DOWN IN PAWNEE.
Jul 21, 2:30 AM CDT	TSTM WND DMG	Avant, OK	TREE LIMBS DOWN IN AVANT.

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 6 storm reports to this severe thunderstorm warning; the first came 8 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
Jul 20, 8:43 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 6.5 hours before the alert went out and 62 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: 3054 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 100 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 210627
SVRTSA
OKC113-117-147-210730-
/O.NEW.KTSA.SV.W.0372.090721T0627Z-090721T0730Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
127 AM CDT TUE JUL 21 2009

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  OSAGE COUNTY IN NORTHEAST OKLAHOMA
  PAWNEE COUNTY IN NORTHEAST OKLAHOMA
  WASHINGTON COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 230 AM CDT

* AT 126 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZE HAIL
  AND DAMAGING WINDS TO 70 MPH. THESE STORMS WERE LOCATED ALONG A
  LINE EXTENDING FROM 44 MILES NORTHWEST OF PAWNEE TO 15 MILES WEST
  OF BURBANK TO 11 MILES NORTHEAST OF FORAKER...MOVING SOUTHEAST AT
  40 MPH.

* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...FORAKER...
  SHIDLER...BURBANK...PEARSONIA...HULAH...BIGHEART...COPAN...
  FAIRFAX...PAWHUSKA...RALSTON...DEWEY...OKESA...BARTLESVILLE...
  WYNONA...SKEDEE...PAWNEE...BARNSDALL...BLACKBURN...OCHELATA...
  HOMINY...AVANT...RAMONA...MARAMEC...CLEVELAND...OSAGE AND HALLETT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS.
TAKE COVER ON THE LOWEST FLOOR IN AN INTERIOR ROOM AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 3671 9705 3670 9694 3676 9689 3679 9676
      3684 9676 3700 9620 3700 9585 3648 9585
      3616 9679 3617 9682 3625 9683 3625 9692
      3634 9693 3635 9703 3651 9704 3656 9690
      3659 9690 3658 9701 3660 9706 3668 9708
TIME...MOT...LOC 0627Z 333DEG 35KT 3659 9753 3675 9699
          3697 9640

$$

3 follow-up statements

000 
WWUS54 KTSA 210650
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
150 AM CDT TUE JUL 21 2009

OKC113-117-147-210730-
/O.CON.KTSA.SV.W.0372.000000T0000Z-090721T0730Z/
WASHINGTON OK-OSAGE OK-PAWNEE OK-
150 AM CDT TUE JUL 21 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR PAWNEE...OSAGE AND WASHINGTON COUNTIES...

AT 148 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY
SIZE HAIL AND DAMAGING WINDS TO 70 MPH. THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM 12 MILES WEST OF RALSTON TO PEARSONIA TO
7 MILES NORTHWEST OF HULAH...MOVING SOUTHEAST AT 40 MPH.

DAMAGING WINDS TO 80 MPH WILL POSSIBLE WITH THESE STORMS IN PEARSONIA
AND PAWHUSKA. 

SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...BIGHEART...
FAIRFAX...HULAH...RALSTON...PAWHUSKA...COPAN...OKESA...PAWNEE...
SKEDEE...NELAGONEY...PERSHING...DEWEY...WYNONA...BARTLESVILLE...
BLACKBURN...TALLANT...BARNSDALL...HOMINY...MARAMEC...OCHELATA...
CLEVELAND...WOLCO...RAMONA...AVANT AND OSAGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...YOU SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS AND BE READY TO ACT QUICKLY.

THIS STORM IS LIKELY PRODUCING LARGE HAIL AND DAMAGING WINDS. SEEK
SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 3671 9705 3670 9694 3676 9689 3679 9676
      3684 9676 3700 9620 3700 9585 3648 9585
      3616 9679 3617 9682 3625 9683 3625 9692
      3634 9693 3635 9703 3651 9704 3656 9690
      3659 9690 3658 9701 3660 9706 3668 9708
TIME...MOT...LOC 0649Z 333DEG 35KT 3653 9694 3675 9647
          3698 9612

$$

000 
WWUS54 KTSA 210702
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
202 AM CDT TUE JUL 21 2009

OKC113-117-147-210730-
/O.CON.KTSA.SV.W.0372.000000T0000Z-090721T0730Z/
WASHINGTON OK-OSAGE OK-PAWNEE OK-
202 AM CDT TUE JUL 21 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR PAWNEE...OSAGE AND WASHINGTON COUNTIES...

AT 202 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY
SIZE HAIL AND DESTRUCTIVE WINDS TO 80 MPH. THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM 8 MILES NORTHWEST OF PAWNEE TO FAIRFAX TO
PAWHUSKA TO BIGHEART...MOVING SOUTHEAST AT 40 MPH.

SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...PAWHUSKA...
RALSTON...COPAN...PERSHING...WYNONA...NELAGONEY...PAWNEE...DEWEY...
OKESA...SKEDEE...BARTLESVILLE...TALLANT...BLACKBURN...BARNSDALL...
HOMINY...CLEVELAND...OCHELATA...RAMONA...WOLCO...AVANT...OSAGE AND
MARAMEC.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...YOU SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS AND BE READY TO ACT QUICKLY.

THIS STORM IS LIKELY PRODUCING LARGE HAIL AND DAMAGING WINDS. SEEK
SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 3671 9705 3670 9694 3676 9689 3679 9676
      3684 9676 3700 9620 3700 9585 3648 9585
      3616 9679 3617 9682 3625 9683 3625 9692
      3634 9693 3635 9703 3651 9704 3656 9690
      3659 9690 3658 9701 3660 9706 3668 9708
TIME...MOT...LOC 0703Z 333DEG 35KT 3641 9689 3656 9667
          3665 9634 3684 9623

$$

000 
WWUS54 KTSA 210710
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
210 AM CDT TUE JUL 21 2009

OKC113-117-147-210730-
/O.CON.KTSA.SV.W.0372.000000T0000Z-090721T0730Z/
WASHINGTON OK-OSAGE OK-PAWNEE OK-
210 AM CDT TUE JUL 21 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR PAWNEE...OSAGE AND WASHINGTON COUNTIES...

AT 209 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY
SIZE HAIL AND DESTRUCTIVE WINDS TO 80 MPH. THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM PAWNEE TO 6 MILES WEST OF WYNONA TO
NELAGONEY TO 7 MILES NORTHWEST OF HULAH...MOVING SOUTHEAST AT 35 MPH.

SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...PERSHING...
WYNONA...TALLANT...BLACKBURN...HULAH...HOMINY...BARNSDALL...OKESA...
COPAN...MARAMEC...CLEVELAND...DEWEY...OCHELATA...RAMONA...
BARTLESVILLE...WOLCO...AVANT AND OSAGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...YOU SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS AND BE READY TO ACT QUICKLY.

THIS IS A DANGEROUS STORM THAT HAS A HISTORY OF PRODUCING DAMAGING
WINDS. SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS.

&&

LAT...LON 3700 9585 3648 9585 3616 9679 3617 9682
      3625 9683 3625 9692 3634 9693 3635 9703
      3651 9704 3656 9690 3660 9691 3659 9695
      3689 9661 3700 9620
TIME...MOT...LOC 0710Z 333DEG 31KT 3635 9685 3651 9642
          3664 9622 3697 9614

$$

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 21, 12:23 AM CDT, 1 hour 4 minutes earlier.

Area forecast discussion, Jul 21, 12:23 AM CDT, 1 hour 4 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1223 AM CDT TUE JUL 21 2009

...AVIATION...

.DISCUSSION...
ISOLATED THUNDERSTORMS WILL CONTINUE IN THE VICINITY OF ALL TAF
SITES IN THE NEAR TERM BEFORE AN MCS MOVES INTO THE AREA FROM
KANSAS WITH MORE WIDESPREAD RAIN. STRONGER STORMS WITH POSSIBLE
LARGE HAIL... STRONG GUSTY WINDS AND VERY HEAVY RAINFALL. RAIN
WILL END FROM NORTH TO SOUTH AFTER FRONTAL PASSAGE DURING THE DAY
TUESDAY.

&&

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

AVIATION...06

Hazardous weather outlook, Jul 20, 9:08 PM CDT, 4 hours 19 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
908 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-
857 PM CDT MON JUL 20 2009

...TORNADO WATCH NUMBER 609 IN EFFECT FOR NORTHEAST OKLAHOMA UNTIL
4 AM CDT...

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

.DAY ONE...TONIGHT.
TORNADO.
RISK...LIMITED.
AREA...EAST OKLAHOMA NORTH OF INTERSTATE 40.
ONSET...AROUND MIDNIGHT.

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

AREA AT GREATEST RISK...NORTHEAST OKLAHOMA NORTHWEST OF
                                INTERSTATE 44.

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

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

DISCUSSION...
CONDITIONS DETERIORATED RAPIDLY THIS EVENING AND SPC UPGRADED TO
A MODERATE RISK OF SEVERE WEATHER OVER PORTIONS OF NORTHEAST
OKLAHOMA. LOW LEVEL MOISTURE AND SUFFICIENT SHEAR IS PRESENT
AS A LOW LEVEL JET INTENSIFIES AHEAD OF A MESOSCALE CONVECTIVE
COMPLEX DEVELOPING IN KANSAS. THE MCS IS EXPECTED TO MOVE SOUTHEAST
INTO NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS DURING THE EARLY
MORNING HOURS AND LINGER OVER PORTIONS OF THE AREA AS IT WEAKENS
AND MOVES TO EAST.

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

.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, 7:38 PM CDT, 5 hours 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, 5 hours 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, 5 hours 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

Special weather statement, Jul 20, 9:04 PM CDT, 4 hours 23 minutes before

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

OKZ062-063-210230-
DELAWARE OK-MAYES OK-
904 PM CDT MON JUL 20 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 930 PM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     WESTERN DELAWARE AND NORTHEASTERN MAYES

AT 904 PM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
CHLOETA...MOVING EAST AT 10 MPH. SOME LOCATIONS THAT WILL BE AFFECTED
BY THIS STORM INCLUDE...CHLOETA...SPAVINAW...LANGLEY AND DISNEY.

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 3654 9486 3623 9484 3627 9501 3651 9511
TIME...MOT...LOC 0204Z 260DEG 8KT 3641 9497

Local storm report, Jul 20, 9:58 PM CDT, 3 hours 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
958 PM CDT MON JUL 20 2009

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

0950 PM     HAIL             7 S GROVE               36.49N 94.77W
07/20/2009  E0.75 INCH       DELAWARE           OK   LAW ENFORCEMENT

            HAIL NEARLY COVERING GROUND VISIBILITY POOR IN HEAVY RAIN
            AND HAIL.

&&

MEB

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, 8:27 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Mayes, Wagoner	35 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, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.