Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 365, NWS Tulsa, OK

July 16, 2009Choctaw County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 16, 2009, 6:47 PM CDT for Choctaw County, Oklahoma. It was in force for 58 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 16, 2009, 6:47 PM CDT (23:47 UTC)
Expired: Jul 16, 2009, 7:45 PM CDT
In force: 58 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County Choctaw County, OK

The radar

The Western Arkansas radar (KSRX), 182 km from the middle of the area, began a volume at 23:47 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
Jul 16, 3:33 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 11.8 hours before the alert went out and 208 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: 1217 J/kg
Mixed-layer CIN: -216 J/kg
Mixed-layer LCL: 1696 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: 17 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KTSA 162347
SVRTSA
OKC023-170045-
/O.NEW.KTSA.SV.W.0365.090716T2347Z-090717T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
647 PM CDT THU JUL 16 2009

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHOCTAW COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 745 PM CDT

* AT 645 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZE HAIL
  AND WINDS TO 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 6 MILES NORTHEAST OF FORT TOWSON TO 12 MILES
  SOUTHWEST OF SOPER...MOVING SOUTHEAST AT 20 MPH.

* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...GOODLAND...
  SAWYER AND FORT TOWSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3389 9552 3388 9554 3394 9558 3389 9569
      3390 9575 3387 9577 3388 9584 3393 9592
      3416 9563 3416 9519 3414 9515 3394 9514
      3396 9523 3390 9525 3389 9532 3386 9534
      3386 9546
TIME...MOT...LOC 2347Z 299DEG 16KT 3409 9519 3394 9587

$$

2 follow-up statements

000 
WWUS54 KTSA 170011
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
711 PM CDT THU JUL 16 2009

OKC023-170045-
/O.CON.KTSA.SV.W.0365.000000T0000Z-090717T0045Z/
CHOCTAW OK-
711 PM CDT THU JUL 16 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR EASTERN CHOCTAW COUNTY...

AT 710 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY
SIZE HAIL AND WINDS TO 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM SWINK TO 9 MILES SOUTHWEST OF GAY...MOVING SOUTHEAST
AT 20 MPH.

SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...ORD...HUSKEY AND
FROGVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3389 9552 3388 9554 3394 9558 3389 9569
      3390 9575 3387 9577 3388 9584 3416 9552
      3416 9519 3414 9515 3394 9514 3396 9523
      3390 9525 3389 9532 3386 9534 3386 9546
TIME...MOT...LOC 0011Z 299DEG 16KT 3401 9521 3389 9576

$$

000 
WWUS54 KTSA 170039
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
739 PM CDT THU JUL 16 2009

OKC023-170049-
/O.EXP.KTSA.SV.W.0365.000000T0000Z-090717T0045Z/
CHOCTAW OK-
739 PM CDT THU JUL 16 2009

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CHOCTAW COUNTY EXPIRES
AT 745 PM CDT...

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM.

LAT...LON 3389 9552 3388 9554 3394 9558 3389 9569
      3390 9575 3387 9577 3388 9584 3416 9552
      3416 9519 3414 9515 3394 9514 3396 9523
      3390 9525 3389 9532 3386 9534 3386 9546
TIME...MOT...LOC 0039Z 299DEG 16KT 3395 9508 3383 9563

$$

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 16, 5:04 PM CDT, 1 hour 43 minutes earlier.

Area forecast discussion, Jul 16, 5:04 PM CDT, 1 hour 43 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
504 PM CDT THU JUL 16 2009

...UPDATE...

.DISCUSSION...
ADDED PITTSBURG AND CHOCTAW COUNTIES TO WATCH NUMBER 589. VERY HIGH
CAPE VALUES...ESPECIALLY OVER PITTSBURG AHEAD OF THE STORM OVER
OKLAHOMA CITY WILL LIKELY SEE ADDITIONAL STORMS FORM OR MOVE TOWARDS
PITTSBURG COUNTY OVER THE NEXT COUPLE OF HOURS. CHOCTAW HAS
BEEN ADDED DUE TO THE CAPE VALUES AS WELL AS A WEAK BOUNDARY
MOVING SOUTH THROUGH PUSHMATAHA COUNTY.

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...EXCESSIVE HEAT WARNING UNTIL 7 PM THURSDAY FOR OKZ049.

AR...NONE.
&&

SHORT TERM...21
LONG TERM....15

Hazardous weather outlook, Jul 16, 4:56 PM CDT, 1 hour 51 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
456 PM CDT THU JUL 16 2009

ARZ001-002-010-011-019-020-029-OKZ049-053>076-171000-
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-
421 PM CDT THU JUL 16 2009

...STRONG...SOME POSSIBLY SEVERE...THUNDERSTORMS EXPECTED TONIGHT AND
INTO FRIDAY...

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...SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS .
ONSET...ONGOING.

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

DANGEROUS HEAT.
RISK...LIMITED.
AREA...SOUTHEAST OKLAHOMA.
ONSET...ONGOING...ENDING THIS EVENING.

DISCUSSION...
OUTFLOW BOUNDARIES CRISS...CROSS THE REGION FROM LAST NIGHTS AND TODAYS
CONVECTIVE STORMS. MOIST AND UNSTABLE AIR REMAINS OVER THE REGION THIS
EVENING AHEAD OF A SOUTH MOVING COOLER AND DRIER AIR MASS THAT
WILL START DECREASING THUNDERSTORM ACTIVITY FROM THE NORTHWEST FRIDAY
MORNING. DUE TO THE VERY UNSTABLE ATMOSPHERE...FAST GROWING THUNDERSTORMS
ARE EXPECTED THIS EVENING AND OVER NIGHT AND CAN BE TRIGGERED BY
ANY INTERSECTING BOUNDARY. LARGE HAIL AND HIGH WINDS ARE THE MAIN
THREAT FROM THESE THUNDERSTORMS.

LOCALLY VERY HEAVY RAIN IS POSSIBLE WITH THE STRONGER THUNDERSTORMS
AND DUE TO SLOW MOVEMENT...SOME LOCAL AREAS CLOUD SEE 2 TO 3 INCHES OF
RAIN IN LESS THAN A HALF HOUR WOULD COULD CAUSE BRIEF FLASH FLOODING.

HEAT INDEX VALUES IN SOUTHEAST OKLAHOMA ARE AROUND 105 DEGREES
LATE THIS AFTERNOON BUT WILL COOL AS THE SUN GETS LOWER AND OUTFLOWS
FROM THE THUNDERSTORMS COOL THE AREAS THAT HAVE NOT HAD THUNDERSTORMS
SO FAR.

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

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

EXTENDED DISCUSSION...
THUNDERSTORMS WILL BE ONGOING EARLY FRIDAY BUT DIMINISH FROM THE
NORTHWEST AS THE COLD FRONT CONTINUES SOUTHWARD THROUGH THE AREA.
DRY AND NOTICEABLY COOLER WEATHER IS EXPECTED OVER THE WEEKEND...WITH
THUNDERSTORM CHANCES RETURNING EARLY NEXT WEEK.

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

In the hours before

Special weather statement, Jul 16, 3:47 PM CDT, 3 hours before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
347 PM CDT THU JUL 16 2009

OKZ058-162115-
OTTAWA OK-
347 PM CDT THU JUL 16 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 415 PM CDT
FOR THE FOLLOWING COUNTY...

IN NORTHEAST OKLAHOMA
     NORTHERN OTTAWA

AT 346 PM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 5 MILES
NORTHWEST OF PICHER...MOVING SOUTHEAST AT 30 MPH. SOME LOCATIONS THAT
WILL BE AFFECTED BY THIS STORM INCLUDE...COMMERCE...OTTAWA...
PEORIA...QUAPAW...CARDIN AND PICHER.

THIS STORM HAS SHOWN A WEAKENING TREND BUT WILL BE CAPABLE OF
PRODUCING WIND GUSTS TO 40 MPH AS THE STORM COLLAPSES.

LAT...LON 3699 9461 3676 9461 3674 9462 3698 9505
      3700 9504 3700 9462
TIME...MOT...LOC 2046Z 305DEG 28KT 3703 9490

Local storm report, Jul 16, 3:50 PM CDT, 2 hours 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
350 PM CDT THU JUL 16 2009

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

0342 PM     TSTM WND DMG     2 N ALBION              34.69N 95.10W
07/16/2009                   LATIMER            OK   PUBLIC

            SEVERAL 20 FT CEDAR TREES BLOWN DOWN. LOTS OF SMALLER
            TREE LIMB DAMAGE

&&

JDS

Local storm report, Jul 16, 4:15 PM CDT, 2 hours 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
415 PM CDT THU JUL 16 2009

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

0342 PM     TSTM WND DMG     SUMMERFIELD             34.90N 94.87W
07/16/2009                   LE FLORE           OK   PUBLIC

            LARGE TREE BLOWN DOWN ONTO BAPTIST CHURCH

&&

JDS

Special weather statement, Jul 16, 4:18 PM CDT, 2 hours 29 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
418 PM CDT THU JUL 16 2009

ARZ029-OKZ076-162145-
LE FLORE OK-SEBASTIAN AR-
418 PM CDT THU JUL 16 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 445 PM CDT
FOR THE FOLLOWING COUNTIES...

IN WEST CENTRAL ARKANSAS
     SOUTHWESTERN SEBASTIAN

IN SOUTHEAST OKLAHOMA
     EASTERN LE FLORE

AT 418 PM CDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A
LINE EXTENDING FROM PATTERSON TO 10 MILES SOUTH OF PATTERSON...MOVING
EAST AT 35 MPH. SOME LOCATIONS THAT WILL BE AFFECTED BY THESE STORMS
INCLUDE...LIBERTY...PATTERSON...HARTFORD AND MANSFIELD.

THESE STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH.

LAT...LON 3496 9423 3496 9429 3495 9431 3495 9437
      3493 9439 3492 9444 3479 9445 3482 9462
      3510 9448 3506 9422 3496 9422
TIME...MOT...LOC 2118Z 286DEG 29KT 3497 9434 3486 9440

Special weather statement, Jul 16, 4:36 PM CDT, 2 hours 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
436 PM CDT THU JUL 16 2009

OKZ049-162200-
PUSHMATAHA OK-
436 PM CDT THU JUL 16 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 500 PM CDT
FOR THE FOLLOWING COUNTY...

IN SOUTHEAST OKLAHOMA
     CENTRAL PUSHMATAHA

AT 436 PM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 5 MILES
SOUTHEAST OF NASHOBA...MOVING EAST AT 35 MPH. SOME LOCATIONS THAT
WILL BE AFFECTED BY THIS STORM INCLUDE...SNOW...NASHOBA...STANLEY...
EUBANKS AND DUNBAR.

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

LAT...LON 3439 9571 3458 9556 3451 9497 3451 9498
      3450 9504 3449 9503 3428 9504
TIME...MOT...LOC 2136Z 277DEG 29KT 3444 9513

Special weather statement, Jul 16, 6:03 PM CDT, 44 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
603 PM CDT THU JUL 16 2009

OKZ053-162330-
CHOCTAW OK-
603 PM CDT THU JUL 16 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 630 PM CDT
FOR THE FOLLOWING COUNTY...

IN SOUTHEAST OKLAHOMA
     WESTERN CHOCTAW

AT 603 PM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 6 MILES
NORTHWEST OF BOSWELL...MOVING EAST AT 20 MPH. SOME LOCATIONS THAT
WILL BE AFFECTED BY THIS STORM INCLUDE...BOSWELL...UNGER...SOPER AND
KENT.

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

LAT...LON 3390 9572 3390 9574 3398 9595 3412 9595
      3416 9598 3416 9600 3417 9600 3417 9587
      3410 9554 3389 9571
TIME...MOT...LOC 2303Z 288DEG 16KT 3409 9594

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 8:56 PM CDT	Special Weather Statement	TSA	Pawnee	34 min
Jul 15, 9:04 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	41 min
Jul 15, 9:39 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee, Tulsa	66 min
Jul 15, 10:12 PM CDT	Severe Thunderstorm Warning	TSA	Creek	63 min
Jul 15, 10:24 PM CDT	Special Weather Statement	TSA	Tulsa	51 min
Jul 15, 10:34 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Tulsa	36 min
Jul 15, 10:42 PM CDT	Special Weather Statement	TSA	Pawnee	63 min
Jul 15, 11:27 PM CDT	Special Weather Statement	TSA	Tulsa	63 min
Jul 15, 11:58 PM CDT	Special Weather Statement	TSA	Osage	62 min
Jul 16, 12:43 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	62 min
Jul 16, 12:53 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	67 min
Jul 16, 1:49 AM CDT	Severe Thunderstorm Warning	TSA	Craig	39 min
Jul 16, 2:02 AM CDT	Special Weather Statement	TSA	Creek	58 min
Jul 16, 2:55 AM CDT	Areal Flood Advisory	TSA	Creek, Osage, Pawnee, Tulsa	65 min
Jul 16, 2:05 PM CDT	Special Weather Statement	TSA	Washington	55 min
Jul 16, 2:14 PM CDT	Severe Thunderstorm Warning	TSA	Osage	61 min
Jul 16, 2:54 PM CDT	Special Weather Statement	TSA	Haskell, LeFlore	66 min
Jul 16, 3:02 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pushmataha	58 min
Jul 16, 3:09 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	21 min
Jul 16, 3:25 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore	50 min
Jul 16, 3:43 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Pushmataha	62 min
Jul 16, 3:47 PM CDT	Special Weather Statement	TSA	Ottawa	28 min
Jul 16, 4:18 PM CDT	Special Weather Statement	TSA	LeFlore	27 min
Jul 16, 4:36 PM CDT	Special Weather Statement	TSA	Pushmataha	24 min
Jul 16, 4:56 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	64 min
Jul 16, 5:52 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	53 min
Jul 16, 6:03 PM CDT	Special Weather Statement	TSA	Choctaw	27 min
Jul 16, 6:11 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	64 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.