Alert archive / Tennessee / Flash Flood Warnings in 1989

Flash Flood Warning 18, NWS Atlanta, GA

July 4, 1989Bledsoe County, Tennessee

NWS Atlanta, GA issued this flash flood warning at Jul 4, 1989, 12:01 PM CDT for Bledsoe County, Tennessee. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jul 4, 1989, 12:01 PM CDT (17:01 UTC)
Expired
Jul 4, 1989, 4:00 PM CDT
In force
4 hr
Issued by
NWS Atlanta, GA
Area
Whole counties

County Bledsoe 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 12:00Z, 5.0 hours before the alert went out and 139 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 12:00Z on 1989-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 349 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 12:00Z on 1989-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 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
349 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
533 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
0 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 KCHA 041703
FFWCHA
TNC007-042100-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHATTANOOGA TN
101 PM EDT (1201 PM CDT) TUE JUL 4 1989
 
THE NATIONAL WEATHER SERVICE IN CHATTANOOGA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  500 PM EDT (400 PM CDT)
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTHEAST TENNESSEE
          ...BLEDSOE
 
RADAR HAS INDICATED MODERATE TO HEAVY RAIN OVER BLEDSOE COUNTY AND THE
SHERIFF DEPARTMENT REPORTS THAT PARTS OF HIGHWAY 27 IS UNDER WATER.
MODERATE TO HEAVY RAINS SHOULD CONTINUE OVER THE COUNTY FOR ANOTHER
HOUR OR SO...BUT THE THREAT FROM RUNOFF WILL CONTINUE FOR SEVERAL
HOURS.
 
 
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 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.

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 3, 8:19 PM CDTFlash Flood WarningFFCRhea3 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.