Alert archive / Georgia / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 861, NWS Atlanta, GA

July 20, 1998Heard County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 20, 1998, 6:18 PM EDT for Heard County, Georgia. It was in force for 37 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
Jul 20, 1998, 6:18 PM EDT (22:18 UTC)
Expired
Jul 20, 1998, 6:55 PM EDT
In force
37 min
Issued by
NWS Atlanta, GA
Area
Whole counties

County Heard County, GA

The radar

The Atlanta radar (KFFC), 53 km from the middle of the area, began a volume at 22:19 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, 10.3 hours before the alert went out and 59 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 1998-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 304 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 1998-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
304 J/kg
Mixed-layer CIN
-193 J/kg
Mixed-layer LCL
1130 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
-14 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.

046 
WUUS1 KATL 202220 RRA
SVRATL
GAC149-202255-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
618 PM EDT MON JUL 20 1998

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HEARD COUNTY IN NORTHWESTERN GEORGIA

* UNTIL 655 PM EDT

* AT 618 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR  12 MILES SOUTHWEST OF FRANKLIN MOVING SOUTHWEST AT 20 MPH.


DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY
LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE
AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. BOATERS...GOLFERS...
AND OTHERS INVOLVED IN OUTSIDE ACTIVITIES SHOULD SEEK SHELTER
IMMEDIATELY. IF YOU EXPERIENCE STORM DAMAGE TO STRUCTURES OR
TREES...OR HAIL THE SIZE OF DIMES OR LARGER...PLEASE REPORT IT TO
THE NATIONAL WEATHER SERVICE BY CALLING 770-486-8535.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 20, 12:25 PM EDT, 5 hours 53 minutes before
GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
091>098-103>113-202000-

NORTH AND CENTRAL GEORGIA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1225 PM EDT MON JUL 20 1998

WIDELY SCATTERED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON OVER NORTH
AND CENTRAL GEORGIA AFTER 3 PM AS AN UPPER LEVEL DISTURBANCE REMAINS
IN PLACE OVER THE STATE.

ALTHOUGH NORTH AND CENTRAL GEORGIA ARE NOT UNDER A RISK OF SEVERE
THUNDERSTORMS TODAY...WE CANNOT RULE OUT ISOLATED OCCURRENCES OF LARGE
HAIL AND DAMAGING WINDS WITH A FEW OF THE STRONGER THUNDERSTORMS THAT
DEVELOP AND PERSIST INTO EARLY EVENING.

SPOTTER GROUPS AND EMERGENCY MANAGEMENT PEOPLE IN NORTH AND CENTRAL
GEORGIA SHOULD MONITOR WEATHER CONDITIONS...BUT SPOTTER ACTIVATION
IS NOT ANTICIPATED AT THIS TIME.

WRS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 8:05 PM EDTSevere Thunderstorm WarningFFCCobb50 min
Jul 19, 8:38 PM EDTSevere Thunderstorm WarningFFCHall32 min
Jul 19, 8:45 PM EDTSevere Thunderstorm WarningFFCWilkinson35 min
Jul 19, 8:56 PM EDTSevere Thunderstorm WarningFFCDeKalb, Henry34 min
Jul 19, 8:58 PM EDTSevere Thunderstorm WarningFFCMadison32 min
Jul 19, 9:28 PM EDTSevere Thunderstorm WarningFFCClayton, DeKalb, Henry32 min
Jul 19, 9:32 PM EDTSevere Thunderstorm WarningFFCMonroe33 min
Jul 19, 9:49 PM EDTSevere Thunderstorm WarningFFCHouston36 min
Jul 19, 9:59 PM EDTSevere Thunderstorm WarningFFCClarke, Jackson36 min
Jul 19, 10:02 PM EDTSevere Thunderstorm WarningFFCClayton33 min
Jul 19, 10:03 PM EDTSevere Thunderstorm WarningFFCMonroe37 min
Jul 19, 10:10 PM EDTSevere Thunderstorm WarningFFCFayette, Fulton35 min
Jul 19, 10:17 PM EDTSevere Thunderstorm WarningFFCPeach33 min
Jul 19, 10:27 PM EDTSevere Thunderstorm WarningFFCLamar33 min
Jul 19, 10:55 PM EDTSevere Thunderstorm WarningFFCSpalding35 min
Jul 19, 11:12 PM EDTSevere Thunderstorm WarningFFCMorgan33 min
Jul 20, 12:12 AM EDTSevere Thunderstorm WarningFFCClayton, Fayette33 min
Jul 20, 12:51 AM EDTSevere Thunderstorm WarningFFCFulton34 min
Jul 20, 1:11 AM EDTSevere Thunderstorm WarningFFCCobb34 min
Jul 20, 1:56 AM EDTSevere Thunderstorm WarningFFCCarroll, Fulton34 min
Jul 20, 2:39 PM EDTSevere Thunderstorm WarningFFCDawson36 min
Jul 20, 2:50 PM EDTSevere Thunderstorm WarningFFCHall35 min
Jul 20, 2:57 PM EDTSevere Thunderstorm WarningFFCDade33 min
Jul 20, 3:07 PM EDTSevere Thunderstorm WarningFFCCherokee, Forsyth33 min
Jul 20, 3:10 PM EDTSevere Thunderstorm WarningFFCBanks35 min
Jul 20, 3:38 PM EDTSevere Thunderstorm WarningFFCBleckley32 min
Jul 20, 4:13 PM EDTSevere Thunderstorm WarningFFCDodge32 min
Jul 20, 4:26 PM EDTSevere Thunderstorm WarningFFCCobb, Douglas34 min
Jul 20, 4:42 PM EDTSevere Thunderstorm WarningFFCGwinnett33 min
Jul 20, 4:46 PM EDTSevere Thunderstorm WarningFFCLaurens34 min
Jul 20, 4:55 PM EDTSevere Thunderstorm WarningFFCHancock35 min
Jul 20, 4:57 PM EDTSevere Thunderstorm WarningFFCHarris33 min
Jul 20, 5:07 PM EDTSevere Thunderstorm WarningFFCCarroll, Douglas33 min
Jul 20, 5:14 PM EDTSevere Thunderstorm WarningFFCCobb, Fulton36 min
Jul 20, 5:15 PM EDTSevere Thunderstorm WarningFFCLamar, Monroe35 min
Jul 20, 5:20 PM EDTSevere Thunderstorm WarningFFCPutnam35 min
Jul 20, 5:45 PM EDTSevere Thunderstorm WarningFFCBaldwin35 min
Jul 20, 5:53 PM EDTSevere Thunderstorm WarningFFCLamar, Pike32 min
Jul 20, 5:59 PM EDTSevere Thunderstorm WarningFFCWashington36 min
Jul 20, 6:16 PM EDTSevere Thunderstorm WarningFFCMorgan, Putnam34 min
Jul 20, 6:27 PM EDTSevere Thunderstorm WarningFFCJasper, Newton33 min
Jul 20, 6:36 PM EDTSevere Thunderstorm WarningFFCMacon, Peach34 min
Jul 20, 6:44 PM EDTSevere Thunderstorm WarningFFCCoweta36 min
Jul 20, 6:45 PM EDTSevere Thunderstorm WarningFFCFayette35 min
Jul 20, 7:01 PM EDTSevere Thunderstorm WarningFFCJasper34 min
Jul 20, 7:36 PM EDTSevere Thunderstorm WarningFFCTaylor34 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1998Every severe thunderstorm 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.