Alert archive / Georgia / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 784, NWS Atlanta, GA

June 30, 1998Clayton County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jun 30, 1998, 8:57 PM EDT for Clayton County, Georgia. It was in force for 33 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: Jun 30, 1998, 8:57 PM EDT (00:57 UTC)
Expired: Jun 30, 1998, 9:30 PM EDT
In force: 33 min
Issued by: NWS Atlanta, GA
Area: Whole counties

County Clayton County, GA

The radar

The Atlanta radar (KFFC), 28 km from the middle of the area, began a volume at 00:47 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, 1.0 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1323 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1608 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 113 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.

103 
WUUS1 KATL 010056
SVRATL
GAC063-010130-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
857 PM EDT TUE JUN 30 1998

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 930 PM EDT

* AT 855 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR  IN THE VICINITY OF MORROW MOVING SOUTHEAST AT 40 MPH.


SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD. 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.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 8:15 PM EDT	Severe Thunderstorm Warning	FFC	Gwinnett	35 min
Jun 30, 8:24 PM EDT	Severe Thunderstorm Warning	FFC	Douglas	36 min
Jun 30, 8:46 PM EDT	Severe Thunderstorm Warning	FFC	Fulton	34 min
Jun 30, 9:04 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb	36 min
Jun 30, 9:11 PM EDT	Severe Thunderstorm Warning	FFC	Newton, Rockdale	34 min
Jun 30, 9:14 PM EDT	Severe Thunderstorm Warning	FFC	Henry	36 min
Jun 30, 9:29 PM EDT	Severe Thunderstorm Warning	FFC	Butts, Jasper	46 min
Jun 30, 10:26 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Gordon	34 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1998 Every 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.