Alert archive / Oklahoma / Flash Flood Warnings in 1989

Flash Flood Warning 13, NWS Tulsa, OK

August 20, 1989Tulsa County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at Aug 20, 1989, 5:18 AM CDT for Tulsa County, Oklahoma. It was in force for 117 min.

The area

The counties it named.

The facts

Issued
Aug 20, 1989, 5:18 AM CDT (10:18 UTC)
Expired
Aug 20, 1989, 7:15 AM CDT
In force
117 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Tulsa County, OK

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 10.3 hours before the alert went out and 166 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-pSkew-T log-p diagram, Norman, OK at 00:00Z on 1989-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2435 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 1989-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2435 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
1542 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
220 m²/s²
Significant tornado parameter
0.4
Supercell composite
5.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 201018
FFWTUL
OKC143-201215-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
518 AM CDT SUN AUG 20 1989
 
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  715 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN NORTHEAST OKLAHOMA
          ...TULSA
 
LIGHT TO MODERATE RAIN CONTINUES TO FALL IN THE TULSA METRO AREA...
WHERE 4 TO 6 INCHES OF RAIN HAS FALLEN IN THE PAST 3 HOURS. MANY
LOW-LYING AREAS SUCH AS UNDERPASSES AND DRAINAGE AREAS INTO SMALL
CREEKS ARE UNDER 3 TO 4 FEET OF WATER. RESIDENTS OF TULSA SHOULD
USE EXTREME CAUTION UNTIL THESE FLOOD WATERS HAVE RECEEDED. DO NOT
DRIVE YOUR CAR INTO FLOOD WATERS UNDER ANY CIRCUMSTANCES...AND
SHOULD YOU BECOME STRANDED IN YOUR CAR...ABANDON IT IMMEDIATELY.
 
 
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS LIKELY OR HAS BEEN
REPORTED.  STAY ALERT AND WATCH FOR RAPIDLY RISING WATER.
REMEMBER...IT'S IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO THE
NEAREST STREAM...CREEK OR RIVER WHICH CAN BECOME A KILLER DURING
PERIODS OF HEAVY RAIN.
 
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  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.  IF YOUR
VEHICLE GETS CAUGHT IN RISING WATER...ABANDONED IT QUICKLY.  THEN
MOVE TO HIGHER GROUND.
 
SOME TULSA AREA CREEKS AND LOW AREAS CAN EXPECT FLOODING DURING
THE NEXT SEVERAL HOURS. POLICE AND CIVIL DEFENSE OFFICIALS ARE
ADVISING PEOPLE TO BE PREPARED TO MOVE TO HIGHER GROUND LOCATIONS
ON SHORT NOTICE.
 
KEEP TUNED TO THIS STATION FOR THE LATEST WEATHER BULLETINS.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 8:16 PM CDTSevere Thunderstorm WarningTSACraig, Ottawa59 min
Aug 19, 10:52 PM CDTSevere Thunderstorm WarningTSAOsage, Washington68 min
Aug 19, 11:44 PM CDTFlash Flood WarningTSANowata3 hr
Aug 20, 2:40 AM CDTFlash Flood WarningTSATulsa65 min
Aug 20, 3:06 AM CDTFlash Flood WarningTSATulsa2 hr
Aug 20, 7:11 AM CDTFlash Flood WarningTSATulsa2 hr
Aug 20, 12:49 PM CDTFlash Flood WarningTSAOsage, Washington3 hr

Nearby

Flash Flood Warnings in Oklahoma, 1989Every flash flood warning in 1989

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.