Alert archive / Georgia / Flash Flood Warnings in 1990

Flash Flood Warning 12, NWS Atlanta, GA

February 16, 1990Catoosa County, Walker County, Whitfield County, Georgia

NWS Atlanta, GA issued this flash flood warning at Feb 16, 1990, 4:39 AM EST for Catoosa County, Walker County, Whitfield County, Georgia. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Feb 16, 1990, 4:39 AM EST (09:39 UTC)
Expired
Feb 16, 1990, 8:00 AM EST
In force
3 hr
Issued by
NWS Atlanta, GA
Area
Whole counties

Counties Catoosa County, GA, Walker County, GA, Whitfield County, GA

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

Athens Municipal, GA (KAHN), launched 00:00Z, 9.7 hours before the alert went out and 194 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, Athens Municipal, GA at 00:00Z on 1990-02-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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, Athens Municipal, GA at 00:00Z on 1990-02-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1378 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
171 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 160942
FFWCHA
GAC047-083-295-313-161245-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHATTANOOGA TENNESSEE
439 AM EST FRI FEB 16 1990
 
THE NATIONAL WEATHER SERVICE IN CHATTANOOGA TENNESSEE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  800 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS
 
IN NORTHWEST GEORGIA
 
   ...CATOOSA COUNTY...DADE COUNTY...WALKER COUNTY...WHITFIELD COUNTY
 
THE FLASH FLOOD WARNING THAT EXPIRED AT 430 AM HAS BEEN EXTENDED UNTIL
800 AM THIS MORNING DUE TO CONTINUED MODERATE TO HEAVY RAIN OVER PARTS
OF NORTHWEST GEORGIA.
 
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
Feb 16, 12:16 AM ESTFlash Flood WarningFFCChattooga, Floyd3 hr
Feb 16, 12:52 AM ESTFlash Flood WarningFFCBartow, Gilmer, Gordon, Pickens3 hr
Feb 16, 12:52 AM ESTFlash Flood WarningFFCFannin, Murray3 hr
Feb 16, 1:22 AM ESTSevere Thunderstorm WarningFFCFloyd, Polk53 min
Feb 16, 1:23 AM ESTFlash Flood WarningFFCDade, Walker3 hr
Feb 16, 1:23 AM ESTFlash Flood WarningFFCCatoosa, Whitfield3 hr
Feb 16, 3:08 AM ESTFlash Flood WarningFFCChattooga, Floyd3 hr
Feb 16, 3:51 AM ESTFlash Flood WarningFFCPolk4 hr
Feb 16, 3:51 AM ESTFlash Flood WarningFFCFannin4 hr
Feb 16, 3:51 AM ESTFlash Flood WarningFFCBartow, Gilmer, Gordon, Murray, Pickens4 hr
Feb 16, 4:39 AM ESTFlash Flood WarningFFCDade3 hr
Feb 16, 5:58 AM ESTSevere Thunderstorm WarningFFCCobb, Douglas, Fulton47 min
Feb 16, 6:29 AM ESTFlash Flood WarningFFCFannin, Gilmer, Murray6 hr
Feb 16, 6:29 AM ESTFlash Flood WarningFFCBartow, Floyd, Gordon, Pickens, Polk6 hr
Feb 16, 6:29 AM ESTFlash Flood WarningFFCChattooga6 hr
Feb 16, 6:58 AM ESTSevere Thunderstorm WarningFFCHall62 min
Feb 16, 7:03 AM ESTSevere Thunderstorm WarningFFCGwinnett27 min
Feb 16, 7:20 AM ESTSevere Thunderstorm WarningFFCNewton, Walton55 min
Feb 16, 7:20 AM ESTSevere Thunderstorm WarningFFCBanks, Barrow, Jackson55 min
Feb 16, 7:20 AM ESTSevere Thunderstorm WarningFFCHabersham55 min
Feb 16, 8:55 AM ESTSevere Thunderstorm WarningFFCRockdale35 min
Feb 16, 9:39 AM ESTSevere Thunderstorm WarningFFCHeard, Troup66 min
Feb 16, 10:04 AM ESTSevere Thunderstorm WarningFFCCoweta41 min
Feb 16, 10:43 AM ESTFlash Flood WarningFFCCobb, DeKalb, Fulton4 hr
Feb 16, 12:38 PM ESTSevere Thunderstorm WarningFFCHouston37 min

Nearby

Flash Flood Warnings in Georgia, 1990Every flash flood warning in 1990

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.