Alert archive / Oklahoma / Flash Flood Warnings in 2002

Flash Flood Warning 18, NWS Tulsa, OK

April 7, 20029 counties in Oklahoma

NWS Tulsa, OK issued this flash flood warning at Apr 7, 2002, 8:40 PM CDT for 9 counties in Oklahoma. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 7, 2002, 8:40 PM CDT (01:40 UTC)
Expired: Apr 8, 2002, 1:30 AM CDT
In force: 5 hr
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

Counties Choctaw County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, McIntosh County, OK, Muskogee County, OK, Pittsburg County, OK, Pushmataha County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 137 km from the middle of the area, began a volume at 01:40 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, 1.7 hours before the alert went out and 192 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: 2 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 450 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 267 m²/s²
0-3 km storm-relative helicity: 265 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KTSA 080140
FFWTUL
OKC023-061-077-079-091-101-121-127-135-080630-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
840 PM CDT SUN APR 7 2002

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR
  SOUTHERN MUSKOGEE COUNTY IN EAST CENTRAL OKLAHOMA
  SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA
  CHOCTAW COUNTY IN SOUTHEAST OKLAHOMA
  HASKELL COUNTY IN SOUTHEAST OKLAHOMA
  LATIMER COUNTY IN SOUTHEAST OKLAHOMA
  LE FLORE COUNTY IN SOUTHEAST OKLAHOMA
  SOUTHERN MCINTOSH COUNTY IN SOUTHEAST OKLAHOMA
  PITTSBURG COUNTY IN SOUTHEAST OKLAHOMA
  PUSHMATAHA COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 130 AM CDT

* RAINFALL OF 2.5 TO 5.0 INCHES HAS OCCURRED THROUGHOUT THE WARNED 
AREA.  RAIN WILL CONTINUE IN THE WARNING AREA...GRADUALLY 
DIMINISHING FROM WEST TO EAST.  AN ADDITIONAL 1 TO 2 INCHES OF RAIN 
WILL LIKELY FALL IN SOUTHEAST OKLAHOMA BY MIDNIGHT.  THE MOST 
SERIOUS FLOODING WILL BE IN THE AREAS AROUND ANTLERS... 
CLAYTON...WILBURTON AND POTEAU WHERE RAINFALL HAS ALREADY BEEN NEAR 
5 INCHES.

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 3387 9545 3395 9561 3388 9577 3395 9594
          3417 9599 3417 9578 3460 9569 3469 9609
          3505 9608 3526 9597 3563 9506 3566 9449
          3452 9448 3451 9504 3395 9515

2 follow-up statements

000 
WGUS74 KTSA 080306
FFSTUL
OKC001-023-061-077-079-091-101-121-127-135-080630-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1005 PM CDT SUN APR 7 2002

...FLASH FLOOD WARNING CONTINUES FOR ADAIR...
   SOUTHERN MUSKOGEE...SEQUOYAH...SOUTHERN MCINTOSH...HASKELL...
   LE FLORE...PITTSBURG...LATIMER...PUSHMATAHA AND CHOCTAW 
   COUNTIES UNTIL 130 AM CDT...

...A DANGEROUS FLASH FLOOD SITUATION HAS DEVELOPED ACROSS SOUTHEAST 
OKLAHOMA...

AT 955 PM RAIN...HEAVY AT TIMES...CONTINUED TO FALL ACROSS THE 
ENTIRE WARNED AREA.  RAINFALL OF 2 TO 4 INCHES IS COMMON WITH 5 TO 6 
INCHES REPORTED FROM THE ANTLERS AREA TOWARD WILBURTON.

THROUGH MIDNIGHT THE HEAVIEST RAIN WILL FALL ACROSS PARTS OF 
LE FLORE COUNTY...WITH RAIN CONTINUING THROUGH 11PM AT MOST 
LOCATIONS. THE RAIN WILL BEGIN TO DIMINISH WITH TIME FROM WEST TO 
EAST.

MANY COUNTY ROADS HAVE BEEN REPORTED UNDER WATER IN LE FLORE 
COUNTY.  WITH THE HEAVIEST RAINS MOVING ACROSS LE FLORE 
COUNTY...LIFE THREATENING SITUATIONS MAY OCCUR.

MANY ROADS ARE CLOSED IN PITTSBURG COUNTY...INCLUDING 
HIGHWAY 270 WEST OF MCALESTER.

THIS IS A DANGEROUS FLASH FLOOD SITURATION.  IF YOU LIVE IN A FLOOD 
PRONE AREA...YOU SHOULD ALREADY BE SET TO MOVE TO HIGHER GROUND.

DO NOT RISK YOUR LIFE BY DRIVING ONTO WATER COVERED ROADS.  MOST 
FLASH FLOOD DEATHS IN THIS AREA ARE IN VEHICLES.  


LAT...LON 3388 9547 3396 9595 3460 9567 3469 9608
          3531 9599 3548 9546 3566 9511 3567 9479
          3592 9479 3617 9481 3617 9457 3542 9444
          3453 9449 3454 9505 3395 9517

000 
WGUS74 KTSA 080411
FFSTUL
OKC023-061-077-079-121-127-135-080630-

FLASH FLOOD STATEMENT...CORRECTION
NATIONAL WEATHER SERVICE TULSA OK
1105 PM CDT SUN APR 7 2002

...CORRECTED TO ADD GRAPHICAL DATA AT THE END OF THE TEXT...

...FLASH FLOOD WARNING CONTINUES FOR ADAIR...SEQUOYAH...HASKELL...
   LE FLORE...PITTSBURG...LATIMER...PUSHMATAHA...CHOCTAW...
   SOUTHERN MCINTOSH AND SOUTHERN MUSKOGEE COUNTIES UNTIL
   130 AM CDT...

...WIDESPREAD FLOODING IS OCCURRING IN SOUTHEAST OKLAHOMA AT 
11PM...

MANY ROADS IN PITTSBURG...HASKELL AND LE FLORE COUNTIES HAVE BEEN 
REPORTED TO BE FLOODED.

THE HEAVIEST RAINFALL DURING THIS EVENT HAS BEEN IN PUSHMATAHA AND 
LATIMER COUNTIES WHERE MEASUREMENTS HAVE REACHED AS HIGH AS 6.26 
INCHES NEAR ANTLERS.  A SWATH OF 5 TO 6 INCH RAINFALL HAS OCCURRED 
FROM WESTERN PUSMATAHA COUNTY...INTO LATIMER AND LE FLORE COUNTIES.  
WIDESPREAD 3 TO 5 INCH AMOUNTS HAVE BEEN REPORTED ELSWHERE IN 
SOUTHEAST OKLAHOMA.  

IN ADAIR COUNTY...RAINFALL HAS RANGED BETWEEN BETWEEN 2.5 AND 3 
INCHES...WITH THE COUNTY EMERGENCY MANAGEMENT AGENCY REPORTING 
RISING WATER EARLIER THIS EVENING.

THE RAIN WILL GRADUALLY DIMINISH IN EASTERN OKLAHOMA THROUGH 
1AM...HOWEVER WATER LEVELS WILL REMAIN HIGH IN SOME AREAS FOR 
SEVERAL MORE HOURS AND MOTORISTS SHOULD REMAINN VERY ALERT FOR WATER 
ON ROADWAYS AND NEVER DRIVE ONTO A FLOOD ROAD.


LAT...LON 3388 9547 3396 9595 3460 9567 3469 9608
          3531 9599 3548 9546 3566 9511 3567 9479
          3592 9479 3617 9481 3617 9457 3542 9444
          3453 9449 3454 9505 3395 9517

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 7, 9:14 PM CDT	Flash Flood Warning	TSA	Adair	4 hr
Apr 8, 1:59 PM CDT	Flash Flood Warning	TSA	Latimer	2 hr
Apr 8, 2:36 PM CDT	Flash Flood Warning	TSA	LeFlore, Sequoyah	3 hr

Nearby

Flash Flood Warnings in Oklahoma, 2002 Every flash flood warning in 2002

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.