Alert archive / Oklahoma / Flash Flood Warnings in 2002

Flash Flood Warning 45, NWS Tulsa, OK

August 13, 2002Pawnee County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at Aug 13, 2002, 7:56 PM CDT for Pawnee 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 outline as issued.

The facts

Issued: Aug 13, 2002, 7:56 PM CDT (00:56 UTC)
Expired: Aug 13, 2002, 10:00 PM CDT
In force: 2 hr
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

County Pawnee County, OK

The radar

The Tulsa radar (KINX), 106 km from the middle of the area, began a volume at 01:00 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

Lamont, OK (KLMN), launched 00:00Z, 0.9 hours before the alert went out and 75 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 767 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: -114 m²/s²
0-3 km storm-relative helicity: 16 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KTSA 140056 CCA
FFWTUL
OKC117-140300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING...CORRECTED EXPIRATION TIME
NATIONAL WEATHER SERVICE TULSA OK
753 PM CDT TUE AUG 13 2002

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR
  PAWNEE COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 1000 PM CDT

* AT 751 PM CDT RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY        
  CONTINUING OVER MUCH OF PAWNEE COUNTY. RADAR INDICATES THAT OVER 3 
  INCHES OF RAIN HAS ALREADY FALLEN OVER THE WARNED AREA. ANOTHER 1  
  TO 2 INCHES WILL BE POSSIBLE THROUGH 1000 PM CDT.

* SOME LOCATIONS THAT WILL CONTINUE TO BE AFFECTED BY THE HEAVY RAIN
  INCLUDE PAWNEE...HALLETT...MARAMEC AND WESTPORT.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

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 3646 9699 3620 9678 3619 9630 3631 9659

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 7:53 PM CDT	Flash Flood Warning	TSA	Pawnee	2 hr
Aug 13, 9:43 PM CDT	Severe Thunderstorm Warning	TSA	Haskell	47 min
Aug 13, 10:20 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	40 min
Aug 14, 12:52 AM CDT	Flash Flood Warning	TSA	Pushmataha	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.