Alert archive / Oklahoma / Flash Flood Warnings in 1999

Flash Flood Warning 48, NWS Tulsa, OK

May 11, 1999Pittsburg County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at May 11, 1999, 11:10 PM CDT for Pittsburg County, Oklahoma. It was in force for 110 min. 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 11, 1999, 11:10 PM CDT (04:10 UTC)
Expired: May 12, 1999, 1:00 AM CDT
In force: 110 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Pittsburg County, OK

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 4.2 hours before the alert went out and 180 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 120410
FFWTUL
OKC023-121-127-120600-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
1110 PM CDT TUE MAY 11 1999

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

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

* UNTIL 100 AM CDT

* AT 1110 PM CDT RADAR INDICATED THUNDERSTORMS ARE CONTINUING TO 
PRODUCE VERY HEAVY RAIN ACROSS CHOCTAW...PITTSBURG AND PUSHMAMTAHA 
COUNTIES.  THESE STORMS ARE  MOVING NORTHEAST AT 10 MPH.  RAINFALL 
REPORTS INDICATED THAT 2 TO 4 INCHES OF RAIN HAS FALLEN ACROSS THESE 
AREAS.  ONE TO TWO ADDITIONAL INCHES OF RAINFALL ARE POSSIBLE.

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.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER MAY BE TOO DEEP TO ALLOW YOUR CAR TO CROSS SAFELY.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO
HIGHER GROUND.

LAT...LON 3447 9585 3386 9575 3424 9504 3513 9591

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, 1 hour 16 minutes earlier.

Area forecast discussion, May 11, 9:54 PM CDT, 1 hour 16 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, 7:15 PM CDT, 3 hours 55 minutes before

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

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

0712 PM    PRYOR                     OK    .88 INCH HAIL
05/11/99   MAYES

0714 PM    CHOUTEAU                  OK    1.75 INCH HAIL
05/11/99   MAYES

Local storm report, May 11, 7:44 PM CDT, 3 hours 26 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, 7:44 PM CDT, 3 hours 26 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, 2 hours 41 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, 1 hour 45 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, 1 hour 11 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

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 12, 12:40 AM CDT	Flash Flood Warning	TSA	Choctaw, Pushmataha	3 hr
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.