Alert archive / Tennessee / Flash Flood Warnings in 1991

Flash Flood Warning 19, NWS Atlanta, GA

December 1, 1991Marion County, Sequatchie County, Tennessee

NWS Atlanta, GA issued this flash flood warning at Dec 1, 1991, 2:32 PM CST for Marion County, Sequatchie County, Tennessee. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Dec 1, 1991, 2:32 PM CST (20:32 UTC)
Expired
Dec 1, 1991, 5:30 PM CST
In force
3 hr
Issued by
NWS Atlanta, GA
Area
Whole counties

Counties Marion County, TN, Sequatchie County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.5 hours before the alert went out and 138 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 1991-12-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 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 1991-12-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 square meters per square second.1939587897Sfc1 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
586 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
285 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 012033
FFWCHA
TNC065-115-143-153-012330-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHATTANOOGA TN
332 PM EST (232 PM CST) SUN DEC 1 1991
 
THE NATIONAL WEATHER SERVICE IN CHATTANOOGA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  630 PM EST (530 PM CST)
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST TENNESSEE
 
   ...NORTHERN HAMILTON COUNTY...MARION COUNTY...RHEA COUNTY
   ...SEQUATCHIE COUNTY
 
HEAVY RAINFALL CONTINUES ACROSS THE AREA WITH ONE TO THREE ADDITIONAL
INCHES OF RAIN BEING REPORTED SINCE NOON. LAW ENFORCEMENT REPORTS
ROADS STARTING TO BE CLOSED DUE TO RISING WATER IN THESE COUNTIES. A
BRIDGE IN DUNLAP IN RHEA COUNTY IS BEING THREATENED. MORE HEAVY
RAINFALL CAN BE EXPECTED FOR THE NEXT SEVERAL HOURS.
 
THIS WARNING RETRANSMITTED BECAUSE DATE WAS WRONG ON ORIGINAL.
 
 
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
Dec 1, 2:32 PM CSTFlash Flood WarningFFCHamilton, Rhea3 hr

Nearby

Flash Flood Warnings in Tennessee, 1991Every flash flood warning in 1991

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.