Alert archive / Oklahoma / Flash Flood Warnings in 2003

Flash Flood Warning 1, NWS Tulsa, OK

April 19, 2003Haskell County, Sequoyah County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at Apr 19, 2003, 9:18 PM CDT for Haskell County, Sequoyah 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 as issued.

The facts

Issued: Apr 19, 2003, 9:18 PM CDT (02:18 UTC)
Expired: Apr 20, 2003, 12:15 AM CDT
In force: 3 hr
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

Counties Haskell County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 53 km from the middle of the area, began a volume at 02:19 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

Springfield, MO (KSGF), launched 00:00Z, 2.3 hours before the alert went out and 199 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: 11 J/kg
Mixed-layer CIN: -140 J/kg
Mixed-layer LCL: 902 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 286 m²/s²
0-3 km storm-relative helicity: 217 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 200219
FFWTUL
OKC061-135-200515-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
918 PM CDT SAT APR 19 2003

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR
  SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA
  HASKELL COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 1215 AM CDT

* AT 918 PM CDT RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN 7
  MILES NORTHEAST OF STIGLER...MOVING NORTHEAST AT 20 MPH.
  FLOODING WAS REPORTED IN THE STIGLER AREA AT 9 PM. RADAR INDICATES
  THAT 1 TO 3 INCHES OF RAIN HAS ALREADY FALLEN OVER THE WARNED 
  AREA. ANOTHER 1 TO 2 INCHES WILL BE POSSIBLE THROUGH MIDNIGHT CDT.

* SOME LOCATIONS THAT WILL CONTINUE TO BE AFFECTED BY THE HEAVY RAIN
  INCLUDE STIGLER...KINTA...ENTERPRISE...WHITEFIELD...TAMAHA...
  SALLISAW...GANS...MULDROW...ROLAND...VIAN...BRUSHY AND MARBLE CITY.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD TO
UNKNOWN DEPTHS. IT ONLY TAKES TWO FEET OF RUSHING WATER TO CARRY AWAY
MOST SPORT UTILITY VEHICLES AND PICKUPS. TAKE A DIFFERENT ROUTE TO
REACH YOUR DESTINATION OR WAIT UNTIL THE WATER RECEDES. REMEMBER...
MOST FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES.

EXCESSIVE RUNOFF WILL CAUSE FLASH FLOODING OF SMALL CREEKS AND
STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND
FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER LOW LYING
AREAS ARE SUBJECT TO FLASH FLOODING.

LAT...LON 3523 9542 3507 9522 3531 9483 3541 9444
          3563 9451 3566 9475

1 follow-up statement

000 
WGUS74 KTSA 200516
FFSTUL
OKC061-135-200530-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1214 AM CDT SUN APR 20 2003

...FLASH FLOOD WARNING FOR SEQUOYAH AND HASKELL COUNTIES HAS 
EXPIRED...

THUNDERSTORMS HAVE MOVED OUT OF SEQUOYAH AND HASKELL COUNTIES...AND 
ADDITIONAL DEVELOPMENT IS NOT EXPECTED. THUS THE THREAT OF ADDITIONAL 
FLOODING HAS ENDED AND THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO 
EXPIRE.

LAT...LON 3516 9528 3504 9513 3558 9449 3562 9491

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 7:12 PM CDT	Tornado Warning	TSA	Pittsburg	28 min
Apr 19, 7:28 PM CDT	Tornado Warning	TSA	Pittsburg	32 min
Apr 19, 7:40 PM CDT	Tornado Warning	TSA	Haskell	35 min
Apr 19, 7:56 PM CDT	Tornado Warning	TSA	Latimer, Pittsburg	34 min
Apr 19, 8:12 PM CDT	Tornado Warning	TSA	Haskell	33 min
Apr 19, 8:28 PM CDT	Tornado Warning	TSA	Latimer, Pittsburg	32 min
Apr 19, 8:43 PM CDT	Tornado Warning	TSA	Haskell	62 min
Apr 19, 8:59 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	46 min
Apr 19, 9:02 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	28 min
Apr 19, 9:18 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	57 min
Apr 19, 9:38 PM CDT	Tornado Warning	TSA	LeFlore	67 min
Apr 19, 9:45 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	15 min
Apr 19, 10:02 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	43 min
Apr 19, 11:35 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	40 min
Apr 19, 11:43 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	47 min

Nearby

Flash Flood Warnings in Oklahoma, 2003 Every flash flood warning in 2003

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.