Alert archive / Oklahoma / Flash Flood Warnings in 1999

Flash Flood Warning 49, NWS Tulsa, OK

May 12, 1999Choctaw County, Pushmataha County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at May 12, 1999, 12:40 AM CDT for Choctaw County, Pushmataha County, Oklahoma. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: May 12, 1999, 12:40 AM CDT (05:40 UTC)
Expired: May 12, 1999, 3:30 AM CDT
In force: 3 hr
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Choctaw County, OK, Pushmataha County, OK

The radar

The Western Arkansas radar (KSRX), 160 km from the middle of the area, began a volume at 05:30 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.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 5.7 hours before the alert went out and 207 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: 244 J/kg
Mixed-layer CIN: -246 J/kg
Mixed-layer LCL: 599 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 152 m²/s²
0-3 km storm-relative helicity: 272 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 120539
FFWTUL
OKC023-127-120830-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
1240 AM CDT WED MAY 12 1999

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR
  CHOCTAW COUNTY IN SOUTHEAST OKLAHOMA
  PUSHMATAHA COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 330 AM CDT

* AT 1235 AM CDT RADAR INDICATED AN AREA OF VERY HEAVY RAIN MOVING 
ACROSS CHOCTAW AND PUSHMATAHA COUNTIES.  3 TO 5 INCHES OF RAINFALL 
HAS BEEN REPORTED IN THE WARNED AREAS...AND AN ADITIONAL 1 TO 2 
INCHES OF RAINFALL IS POSSIBLE.  THE GREATEST RISK OF FLASH FLOODING 
IS FROM THE HUGO AREA NORTHWARD TO NEAR ANTLERS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 3391 9590 3392 9518 3468 9491 3459 9565

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at May 11, 9:54 PM CDT, 2 hours 46 minutes earlier.

Area forecast discussion, May 11, 9:54 PM CDT, 2 hours 46 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
954 PM CDT TUE MAY 11 1999

WILL UPDATE SHORTLY TO ACCOUNT FOR MINOR CHANGES BASED ON LATEST
SURFACE ANALYSIS. WILL LOWER TEMPS AND INCREASE WINDS NW OF TUL.
WILL INCREASE POPS ALONG AND EAST OF FRONT WHICH CURRENTLY STRETCHES
FROM JLN-DFW. FRONT HAS BEEN A SLOW MOVER EVER SINCE LAST NIGHT...SO
LOCALLY HEAVY RAINFALL CONTINUES TO BE A THREAT...ESPECIALLY GIVEN
THREE-HOUR FLASH FLOOD GUIDANCE VALUES RANGING FROM 1.5-2.2 INCHES.
GIVEN THE NEAR CERTAINTY OF MORE FLASH FLOOD WARNINGS BEING
ISSUED...WILL ISSUE FLASH FLOOD WATCH FROM WESTERN EDGE OF CURRENT
ACTIVITY TO INLUDE THE WESTERNMOST ARKANSAS COUNTIES IN THE FCST
AREA.

CURRENT STORM IN MUSKOGEE/CHEROKEE/SEQUOYAH COUNTY REGION HAS
HAD ITS ROTATION ENHANCED BY EASTERLY SURFACE WINDS COMING OUT OF
THE ARKANSAS RIVER VALLEY OF WESTERN ARKANSAS...SO ANY STORMS IN
THIS REGION WILL CONTINUE TO HAVE THE HIGHEST POTENTIAL FOR
ROTATION.

FCSTID = 22

.TUL...
AR...FLAHS FLOOD WATCH ZNS 1...10...19...29.
OK...FLASH FLOOD WATCH ALONG AND EAST OF BVO-TUL-MLC-HHW.
     SEVERE THUNDERSTORM WATCH UNTIL MIDNIGHT.

In the hours before

Local storm report, May 11, 7:44 PM CDT, 4 hours 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
744 PM CDT TUE MAY 11 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0729 PM    TULLAHASSEE               OK    .88 INCH HAIL
05/11/99   WAGONER

Local storm report, May 11, 8:29 PM CDT, 4 hours 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
829 PM CDT TUE MAY 11 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0810 PM    BLUFF                     OK    .75 INCH HAIL
05/11/99   CHOCTAW

0823 PM    KIOWA                     OK    1.75 INCH HAIL
05/11/99   PITTSBURG

Local storm report, May 11, 9:25 PM CDT, 3 hours 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
925 PM CDT TUE MAY 11 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0835 PM    1 E MUSKOGEE              OK    1 INCH HAIL
05/11/99   MUSKOGEE

0916 PM    4 S BRAGGS                OK    TORNADO
05/11/99   MUSKOGEE

0918 PM    TAHLEQUAH                 OK    .88 INCH HAIL
05/11/99   CHEROKEE

0920 PM    SOPER                     OK    2 INCH HAIL
05/11/99   CHOCTAW

Local storm report, May 11, 9:59 PM CDT, 2 hours 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
959 PM CDT TUE MAY 11 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0945 PM    BRAGGS                    OK    1.75 INCH HAIL
05/11/99   MUSKOGEE

Local storm report, May 11, 11:16 PM CDT, 1 hour 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1116 PM CDT TUE MAY 11 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1106 PM    MULDROW                   OK    WIND DAMAGE
05/11/99   SEQUOYAH                        LARGE TREE LIMBS BLOWN
                                           DOWN.

Local storm report, May 12, 12:12 AM CDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1212 AM CDT WED MAY 12 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1130 PM    VAN BUREN                 AR    60 MPH TSTM GUST
05/11/99   CRAWFORD

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 7:23 PM CDT	Flash Flood Warning	TSA	Mayes	2 hr
May 11, 7:27 PM CDT	Severe Thunderstorm Warning	TSA	Wagoner	48 min
May 11, 7:28 PM CDT	Tornado Warning	TSA	Mayes	32 min
May 11, 7:37 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	38 min
May 11, 7:40 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh	35 min
May 11, 7:46 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	59 min
May 11, 7:53 PM CDT	Tornado Warning	TSA	Cherokee, Mayes	52 min
May 11, 7:57 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee	48 min
May 11, 8:15 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	30 min
May 11, 8:19 PM CDT	Tornado Warning	TSA	Muskogee	41 min
May 11, 8:28 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	47 min
May 11, 8:38 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	52 min
May 11, 8:44 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	46 min
May 11, 8:45 PM CDT	Tornado Warning	TSA	Cherokee, Muskogee	45 min
May 11, 8:46 PM CDT	Tornado Warning	TSA	Choctaw	29 min
May 11, 9:06 PM CDT	Flash Flood Warning	TSA	Muskogee	3 hr
May 11, 9:07 PM CDT	Flash Flood Warning	TSA	Pittsburg, Pushmataha	2 hr
May 11, 9:07 PM CDT	Flash Flood Warning	TSA	Choctaw	2 hr
May 11, 9:11 PM CDT	Tornado Warning	TSA	Choctaw	34 min
May 11, 9:15 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	45 min
May 11, 9:25 PM CDT	Tornado Warning	TSA	Muskogee, Sequoyah	50 min
May 11, 9:26 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	49 min
May 11, 9:29 PM CDT	Tornado Warning	TSA	Cherokee	46 min
May 11, 9:42 PM CDT	Tornado Warning	TSA	Choctaw	48 min
May 11, 9:54 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	51 min
May 11, 10:09 PM CDT	Tornado Warning	TSA	Sequoyah	51 min
May 11, 10:16 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	44 min
May 11, 10:29 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Okmulgee, Wagoner	46 min
May 11, 10:29 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	46 min
May 11, 10:39 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee	51 min
May 11, 10:46 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	29 min
May 11, 10:54 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	51 min
May 11, 11:10 PM CDT	Flash Flood Warning	TSA	Choctaw, Pushmataha	110 min
May 11, 11:10 PM CDT	Flash Flood Warning	TSA	Pittsburg	110 min
May 12, 3:00 AM CDT	Flash Flood Warning	TSA	Cherokee, Muskogee, Wagoner	3 hr

Nearby

Flash Flood Warnings in Oklahoma, 1999 Every flash flood warning in 1999

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.