Alert archive / Tennessee / Flash Flood Warnings in 1989

Flash Flood Warning 4, NWS Nashville, TN

February 20, 1989Sumner County, Wilson County, Tennessee

NWS Nashville, TN issued this flash flood warning at Feb 20, 1989, 9:49 PM CST for Sumner County, Wilson County, Tennessee. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Feb 20, 1989, 9:49 PM CST (03:49 UTC)
Expired
Feb 21, 1989, 2:45 AM CST
In force
5 hr
Issued by
NWS Nashville, TN
Area
Whole counties

Counties Sumner County, TN, Wilson County, TN

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

Nashville Metro, TN (KBNA), launched 00:00Z, 3.8 hours before the alert went out and 28 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, Nashville Metro, TN at 00:00Z on 1989-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 1989-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 196 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
662 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
196 m²/s²
0-3 km storm-relative helicity
199 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBNA 210352
FFWBNA
TNC021-165-189-210845-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
949 PM CST MON FEB 20 1989
 
THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  245 AM CST
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN MIDDLE TENNESSEE
          ...CHEATHAM...SUMNER...NORTHERN WILSON
 
 
AT 940 PM CST THE TENNESSEE STATE EMERGENCY OPERATIONS CENTER
REPORTED SEVERAL ROAD IN CHEATHAM COUNTY WERE UNDER WATER.
 
AN OFF DUTY WEATHER SERVICE ALSO REPORTED RAINFALL OF 2.65
INCHES IN PORTLAND TENNESSEE AND THAT PORTIONS OF HIGHWAY 109
IN SUMNER COUNTY ARE UNDER WATER.
 
WITH THESE RAINFALL AMOUNTS ACROSS THE AREA AND THE FORECAST
CALLING FOR MORE RAIN THROUGH THE NIGHT FLOODING WILL CONTINUE
TILL MORNING.
 
 
 
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 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 DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS S:AFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.

The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 20, 8:36 PM CSTFlash Flood WarningOHXLawrence, Wayne6 hr
Feb 20, 9:49 PM CSTFlash Flood WarningOHXCheatham5 hr

Nearby

Flash Flood Warnings in Tennessee, 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.