Alert archive / Oklahoma / Flash Flood Warnings in 1989
Flash Flood Warning 13, NWS Tulsa, OK
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.
- 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
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 8:16 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Ottawa | 59 min |
| Aug 19, 10:52 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Washington | 68 min |
| Aug 19, 11:44 PM CDT | Flash Flood Warning | TSA | Nowata | 3 hr |
| Aug 20, 2:40 AM CDT | Flash Flood Warning | TSA | Tulsa | 65 min |
| Aug 20, 3:06 AM CDT | Flash Flood Warning | TSA | Tulsa | 2 hr |
| Aug 20, 7:11 AM CDT | Flash Flood Warning | TSA | Tulsa | 2 hr |
| Aug 20, 12:49 PM CDT | Flash Flood Warning | TSA | Osage, Washington | 3 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.