Alert archive / Georgia / Flash Flood Warnings in 1989

Flash Flood Warning 13, NWS Atlanta, GA

June 20, 1989Oconee County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jun 20, 1989, 3:38 PM EDT for Oconee County, Georgia. It was in force for 47 min.

The area

The counties it named.

The facts

Issued
Jun 20, 1989, 3:38 PM EDT (19:38 UTC)
Expired
Jun 20, 1989, 4:25 PM EDT
In force
47 min
Issued by
NWS Atlanta, GA
Area
Whole counties

County Oconee 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 12:00Z, 7.6 hours before the alert went out and 18 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 12:00Z on 1989-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 328 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 12:00Z on 1989-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 square meters per square second.193958Sfc1 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
328 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
695 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
105 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KAHN 201939
FFWAHN
GAC059-195-219-221-202145-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ATHENS GA
338 PM EDT TUE JUN 20 1989
 
THE NATIONAL WEATHER SERVICE IN ATHENS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  545 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN NORTHEAST GEORGIA
          ...CLARKE...MADISON...OCONEE...OGLETHORPE
 
 
 
 
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 SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 12:41 PM EDTFlash Flood WarningFFCClayton, Fayette4 hr
Jun 20, 12:41 PM EDTFlash Flood WarningFFCDeKalb4 hr
Jun 20, 1:19 PM EDTFlash Flood WarningFFCFulton, Gwinnett3 hr
Jun 20, 1:19 PM EDTFlash Flood WarningFFCHenry, Rockdale3 hr
Jun 20, 2:08 PM EDTFlash Flood WarningFFCStephens3 hr
Jun 20, 2:08 PM EDTFlash Flood WarningFFCBanks, Barrow, Jackson2 hr
Jun 20, 2:08 PM EDTFlash Flood WarningFFCHabersham2 hr
Jun 20, 2:08 PM EDTFlash Flood WarningFFCWalton3 hr
Jun 20, 2:08 PM EDTFlash Flood WarningFFCHall3 hr
Jun 20, 3:38 PM EDTFlash Flood WarningFFCClarke, Madison, Oglethorpe47 min

Nearby

Flash Flood Warnings in Georgia, 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.