Alert archive / Georgia / Flash Flood Warnings in 1998

Flash Flood Warning 3, NWS Atlanta, GA

February 4, 19984 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Feb 4, 1998, 5:20 AM EST for 4 counties in Georgia. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Feb 4, 1998, 5:20 AM EST (10:20 UTC)
Expired
Feb 4, 1998, 11:15 AM EST
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Whole counties

Counties Clayton County, GA, Cobb County, GA, DeKalb County, GA, Fulton County, GA

The radar

The Atlanta radar (KFFC), 47 km from the middle of the area, began a volume at 10:20 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 00:00Z, 10.3 hours before the alert went out and 44 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 00:00Z on 1998-02-04Temperature 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 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 00:00Z on 1998-02-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 216 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
506 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
216 m²/s²
0-3 km storm-relative helicity
490 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 041021
FFWATL
GAC063-067-089-121-041615-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
520 AM EST WED FEB 4 1998
 
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1115 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST GEORGIA
 
   ...CLAYTON COUNTY...COBB COUNTY...DEKALB COUNTY...FULTON COUNTY
 
AT 515 AM WEATHER SERVICE RADAR INDICATED HEAVY RAIN CONTINING OVER THE
ATLANTA METRO COUNITIES. THIS RAIN IS EXPECTED TO CONTINUE THE NEXT
COUPLE OF HOURS.
 
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE
...ON FOOT. DO NOT ALLOW CHILDREN TO PLAY NEAR CREEKS...DRAINAGE
DITCHES OR URBAN SEWER SYSTEMS DURING OR AFTER HEAVY RAINS.
 
IF RAPIDLY RISING WATER THREATENS HOMES OR BUSINESSES IN YOUR AREA
....OR IF YOU SEE ROADS OR BRIDGES BEING COVERED WITH WATER FzROM
RISING CREEKS OR STREAMS...PLEASE CALL THE NATIONAL WEATHER SERVICE
AT 770-486-8535.
 
BDL

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 4, 4:50 AM ESTFlash Flood WarningFFCUpson3 hr

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.