Alert archive / Georgia / Flash Flood Warnings in 1998

Flash Flood Warning 2, NWS Atlanta, GA

February 4, 1998Upson County, Georgia

NWS Atlanta, GA issued this flash flood warning at Feb 4, 1998, 4:50 AM EST for Upson County, Georgia. It was in force for 3 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, 4:50 AM EST (09:50 UTC)
Expired
Feb 4, 1998, 7:45 AM EST
In force
3 hr
Issued by
NWS Atlanta, GA
Area
Whole counties

County Upson County, GA

The radar

The Atlanta radar (KFFC), 59 km from the middle of the area, began a volume at 09:50 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, 9.8 hours before the alert went out and 58 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 040953
FFWATL
GAC293-041245-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
450 AM EST WED FEB 4 1998
 
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  745 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN WEST CENTRAL GEORGIA
 
   ...UPSON COUNTY
 
AT 445 AM WEATHER SERVICE RADAR INDICATED VERY HEAVY RAIN OVER ALMOST
ALL OF UPSON COUNTY. THE RAIN WILL MOVE OUT AROUND 530 AM.
 
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING. IF FLASH FLOODING IS
OBSERVED...MOVE TO HIGHER GROUND QUICKLY.
 
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.
 
BDL

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 4, 5:20 AM ESTFlash Flood WarningFFCClayton, Cobb, DeKalb, Fulton6 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.