Alert archive / Georgia / Flash Flood Warnings in 1998

Flash Flood Warning 14, NWS Atlanta, GA

August 14, 1998Spalding County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 14, 1998, 7:06 PM EDT for Spalding County, Georgia. It was in force for 79 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 14, 1998, 7:06 PM EDT (23:06 UTC)
Expired
Aug 14, 1998, 8:25 PM EDT
In force
79 min
Issued by
NWS Atlanta, GA
Area
Whole counties

County Spalding County, GA

The radar

The Atlanta radar (KFFC), 29 km from the middle of the area, began a volume at 23:07 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.1 hours before the alert went out and 23 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, Peachtre/Fal Fld, GA at 12:00Z on 1998-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 625 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, Peachtre/Fal Fld, GA at 12:00Z on 1998-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 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
625 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
606 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
75 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 KATL 142307
FFWATL
GAC255-150025-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
706 PM EDT FRI AUG 14 1998

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SPALDING COUNTY IN NORTHWESTERN GEORGIA

* UNTIL 825 PM EDT

* AT 700 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAIN FROM BROOKS TO NEAR GRIFFIN...
  MOVING SLOWLY EAST. RAINFALL AMOUNTS OF 1 TO 2 INCHES FELL ACROSS
  THE COUNTY BETWEEN 6 AND 7 PM. AN ADDITIONAL 2 TO 3 INCHES MAY
  FALL BEFORE RAINS DIMINISH AROUND 8 PM.


DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. WATER DEPTHS OF ONLY ONE TO TWO FEET WILL CAUSE MOST
AUTOMOBILES TO BECOME STRANDED OR FLOAT AWAY. IF THE WATER IS
MOVING...THE ROAD BED MAY BE ERODED. VEHICLES CAUGHT IN RISING WATER
SHOULD BE ABANDONED QUICKLY. IF RAPIDLY RISING WATER THREATENS HOMES
OR BUS,INESSES IN YOUR AREA....OR IF YOU SEE ROADS OR BRIDGES BEING
COVERED WITH WATER FROM RISING CREEKS OR STREAMS...PLEASE CALL THE
NATIONAL WEATHER SERVICE AT 770-486-8535.


15

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 10:09 PM EDTFlash Flood WarningFFCCoweta116 min
Aug 14, 6:50 PM EDTSevere Thunderstorm WarningFFCBleckley, Pulaski35 min

Nearby

Flash Flood Warnings in Georgia, 1998Every flash flood warning in 1998

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; radar from the NEXRAD Level II archive.