Alert archive / Oklahoma / Flash Flood Warnings in 1999

Flash Flood Warning 60, NWS Tulsa, OK

May 23, 1999Cherokee County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at May 23, 1999, 3:58 AM CDT for Cherokee County, Oklahoma. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 23, 1999, 3:58 AM CDT (08:58 UTC)
Expired: May 23, 1999, 6:00 AM CDT
In force: 2 hr
Issued by: NWS Tulsa, OK
Area: Whole counties

County Cherokee County, OK

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 9.0 hours before the alert went out and 154 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: 189 J/kg
Mixed-layer CIN: -135 J/kg
Mixed-layer LCL: 1465 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 230904
FFWTUL
OKC021-101-111-145-231100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
358 AM CDT SUN MAY 23 1999

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR
  CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA
  MUSKOGEE COUNTY IN EAST CENTRAL OKLAHOMA
  OKMULGEE COUNTY IN NORTHEAST OKLAHOMA
  WAGONER COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 600 AM CDT

* AT 355 AM CDT RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN   
EXTENDING FROM NORTHWEST OKMULGEE COUNTY TO CHEROKEE COUNTY...MOVING 
EAST-SOUTHEAST AT 15 MPH.

ONE TO THREE INCHES OF RAIN WILL BE POSSIBLE OVER THESE COUNTIES BY 
5 AM...RESULTING IN EXCESSIVE RUNNOFF AND POSSIBLE FLASH FLOODING. 

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.

LA&T...LON 3584 9615 3561 9617 3568 9478 3617 9479

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 22, 11:07 PM CDT, 4 hours 51 minutes earlier.

Area forecast discussion, May 22, 11:07 PM CDT, 4 hours 51 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1107 PM CDT SAT MAY 22 1999

HAVE ISSUED A FLASH FLOOD WATCH FOR MUCH OF EASTERN OKLAHOMA.  WHILE
SOME UNCERTAINTIES REMAIN ON THE EVOLUTION OF THE COMPLEX TO THE
NORTH...IT APPEARS THAT THERE IS A GOOD CHANCE THAT IT WILL TURN
MORE SOUTH AND TRAVEL ALONG AND JUST SOUTH OF THE H850 WEAK
BAROCLINIC ZONE EXTENDING NEAR AN ICT-FYV LINE AT 00Z.

WHILE THERE WILL BE A SEVERE THREAT...AM ALSO CONCERNED THAT WITH A
30 KNOT H850 JET FEEDING INTO THE COMPLEX...THE SOUTHWEST EDGE OF
THE COMPLEX WILL ANCHOR IN OR NEAR THE AREA AND RESULT IN A PERIOD
OF TRAINING ECHOES.

LAPES RATES IN THE AREA ARE STEEP RESULTING SUFFICIENT ELEVATED
INSTABILITY TO SUPPORT THE IDEA OF BOTH A HAIL AND WIND THREAT WITH
THESE STORMS..DESPITE A CONVECTIVELY MODIFIED BOUNDARY LAYER IN MOST
OF THE FORECAST AREA.  AT THIS TIME WE ARE EXPECTING THAT THE STORMS
WILL BE MOVING INTO OSAGE / PAWNEE COUNTIES AROUND 07Z AND PROGRESS
SOUTHEAST FROM THERE.

/8

.TUL...
AR...NONE.
OK...OKZ054>075 FLASH FLOOD WATCH TONIGHT.

In the hours before

Special weather statement, May 22, 10:10 PM CDT, 5 hours 48 minutes before

OKZ076-230330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1010 PM CDT SAT MAY 22 1999

SEVERE THUNDERSTORM WATCH NUMBER 314 HAS BEEN CANCELLED IN LE FLORE
COUNTY OKLAHOMA.  THE SEVERE STORMS THAT HAVE MOVED THROUGH THAT AREA
HAVE MOVED INTO MCCURTAIN COUNTY AND ADJACENT PARTS OF SOUTHWEST
ARKANSAS AND NO LONGER POSE A THREAT TO LE FLORE COUNTY.

THUNDERSTORMS OVER KANSAS MAY TURN TO THE SOUTH DURING THE NIGHT AND
COULD REACH LE FLORE COUNTY TOWARD MORNING...BUT UNTIL THEN THE
THREAT FOR SEVERE WEATHER HAS ENDED.

STAY TUNED TO THIS STATION FOR FURTHER INFORMATION FROM THE NATIONAL
WEATHER SERVICE.

Special weather statement, May 22, 10:10 PM CDT, 5 hours 48 minutes before

OKZ076-230330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1010 PM CDT SAT MAY 22 1999

SEVERE THUNDERSTORM WATCH NUMBER 314 HAS BEEN CANCELLED IN LE FLORE
COUNTY OKLAHOMA.  THE SEVERE STORMS THAT HAVE MOVED THROUGH THAT AREA
HAVE MOVED INTO MCCURTAIN COUNTY AND ADJACENT PARTS OF SOUTHWEST
ARKANSAS AND NO LONGER POSE A THREAT TO LE FLORE COUNTY.

THUNDERSTORMS OVER KANSAS MAY TURN TO THE SOUTH DURING THE NIGHT AND
COULD REACH LE FLORE COUNTY TOWARD MORNING...BUT UNTIL THEN THE
THREAT FOR SEVERE WEATHER HAS ENDED.

STAY TUNED TO THIS STATION FOR FURTHER INFORMATION FROM THE NATIONAL
WEATHER SERVICE.

Local storm report, May 22, 10:42 PM CDT, 5 hours 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1042 PM CDT SAT MAY 22 1999

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

0400 PM    SILOAM SPGS               AR    .75 INCH HAIL
05/22/99   BENTON

0440 PM    WESTVILLE                 OK    .75 INCH HAIL
05/22/99   ADAIR

0530 PM    3 W MARAMEC               OK    1 INCH HAIL
05/22/99   PAWNEE

0530 PM    BARNSDALL                 OK    1 INCH HAIL
05/22/99   OSAGE

0530 PM    VERA                      OK    .88 INCH HAIL
05/22/99   WASHINGTON

0640 PM    NATURAL DAM               AR    1 INCH HAIL
05/22/99   CRAWFORD

0700 PM    TULSA                     OK    FLOOD
05/22/99   TULSA                           STREET FLOODING

0700 PM    JENKS                     OK    1 INCH HAIL
05/22/99   TULSA

0715 PM    BEGGS                     OK    .88 INCH HAIL
05/22/99   OKMULGEE

0715 PM    3 N MOODYS                OK    .75 INCH HAIL
05/22/99   CHEROKEE

0730 PM    2 W BEGGS                 OK    .75 INCH HAIL
05/22/99   OKMULGEE

0730 PM    BOLEY                     OK    .75 INCH HAIL
05/22/99   OKFUSKEE

Local storm report, May 22, 10:42 PM CDT, 5 hours 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1042 PM CDT SAT MAY 22 1999

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

0400 PM    SILOAM SPGS               AR    .75 INCH HAIL
05/22/99   BENTON

0440 PM    WESTVILLE                 OK    .75 INCH HAIL
05/22/99   ADAIR

0530 PM    3 W MARAMEC               OK    1 INCH HAIL
05/22/99   PAWNEE

0530 PM    BARNSDALL                 OK    1 INCH HAIL
05/22/99   OSAGE

0530 PM    VERA                      OK    .88 INCH HAIL
05/22/99   WASHINGTON

0640 PM    NATURAL DAM               AR    1 INCH HAIL
05/22/99   CRAWFORD

0700 PM    TULSA                     OK    FLOOD
05/22/99   TULSA                           STREET FLOODING

0700 PM    JENKS                     OK    1 INCH HAIL
05/22/99   TULSA

0715 PM    BEGGS                     OK    .88 INCH HAIL
05/22/99   OKMULGEE

0715 PM    3 N MOODYS                OK    .75 INCH HAIL
05/22/99   CHEROKEE

0730 PM    2 W BEGGS                 OK    .75 INCH HAIL
05/22/99   OKMULGEE

0730 PM    BOLEY                     OK    .75 INCH HAIL
05/22/99   OKFUSKEE

Local storm report, May 23, 3:36 AM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
336 AM CDT SUN MAY 23 1999

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

0202 AM    10 W PAWHUSKA             OK    .75 INCH HAIL
05/23/99   OSAGE

0240 AM    BERNICE                   OK    .88 INCH HAIL
05/23/99   DELAWARE

0240 AM    TERLTON                   OK    62 MPH TSTM GUST
05/23/99   PAWNEE

0307 AM    TULSA                     OK    .88 INCH HAIL
05/23/99   TULSA

0325 AM    SHAMROCK                  OK    60 MPH TSTM GUST
05/23/99   CREEK

Local storm report, May 23, 3:36 AM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
336 AM CDT SUN MAY 23 1999

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

0202 AM    10 W PAWHUSKA             OK    .75 INCH HAIL
05/23/99   OSAGE

0240 AM    BERNICE                   OK    .88 INCH HAIL
05/23/99   DELAWARE

0240 AM    TERLTON                   OK    62 MPH TSTM GUST
05/23/99   PAWNEE

0307 AM    TULSA                     OK    .88 INCH HAIL
05/23/99   TULSA

0325 AM    SHAMROCK                  OK    60 MPH TSTM GUST
05/23/99   CREEK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 7:13 PM CDT	Severe Thunderstorm Warning	TSA	Okmulgee	47 min
May 22, 7:21 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	39 min
May 22, 7:36 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee	39 min
May 22, 7:40 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	50 min
May 22, 7:49 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	41 min
May 22, 7:56 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	49 min
May 22, 8:46 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	44 min
May 22, 9:23 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	52 min
May 23, 1:45 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	45 min
May 23, 1:45 AM CDT	Severe Thunderstorm Warning	TSA	Nowata, Rogers, Washington	45 min
May 23, 1:45 AM CDT	Severe Thunderstorm Warning	TSA	Craig	45 min
May 23, 1:58 AM CDT	Severe Thunderstorm Warning	TSA	Ottawa	47 min
May 23, 2:30 AM CDT	Severe Thunderstorm Warning	TSA	Delaware, Mayes, Ottawa	60 min
May 23, 2:30 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee, Tulsa	60 min
May 23, 2:30 AM CDT	Severe Thunderstorm Warning	TSA	Rogers, Wagoner	60 min
May 23, 3:35 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee	55 min
May 23, 3:35 AM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Tulsa, Wagoner	55 min
May 23, 3:58 AM CDT	Flash Flood Warning	TSA	Muskogee, Okmulgee, Wagoner	2 hr
May 23, 4:17 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh	43 min

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.