Alert archive / Georgia / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 540, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Jul 24, 1999, 6:18 PM EDT for Clayton County, Georgia. It was in force for 47 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 24, 1999, 6:18 PM EDT (22:18 UTC)
- Expired
- Jul 24, 1999, 7:05 PM EDT
- In force
- 47 min
- Issued by
- NWS Atlanta, GA
- Area
- Whole counties
County Clayton County, GA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 24, 6:30 PM EDT | Thunderstorm Wind | Forest Park, GA | Clayton county 911 reported a few small trees down in Forest Park and Morrow. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.3 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.
- Mixed-layer CAPE
- 1875 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 1103 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- -17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KATL 242216 SVRATL GAC063-242305- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PEACHTREE CITY GA 618 PM EDT SAT JUL 24 1999 THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CLAYTON COUNTY IN NORTHWESTERN GEORGIA * UNTIL 705 PM EDT * AT 617 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER RADAR 4 MILES SOUTHWEST OF FOREST PARK... MOVING EAST AT 10 MPH. * SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE... JONESBORO AROUND 635 PM EDT... FOREST PARK AROUND 635 PM EDT... MORROW AROUND 640 PM EDT... CONLEY AROUND 650 PM EDT... THIS THUNDERSTORM IS PRODUCING VERY HEAVY RAIN THAT MAY FLOOD ROADS QUICKLY. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. IF YOU SEE FLOODING...LARGE HAIL OR WIND DAMAGE...CALL THE NATIONAL WEATHER SERVICE AT 770-486.-1133 AT EXTENSION 2 0 4.
The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 9:00 PM EDT | Severe Thunderstorm Warning | FFC | Crisp | 20 min |
| Jul 23, 9:08 PM EDT | Severe Thunderstorm Warning | FFC | Wilcox | 17 min |
| Jul 23, 9:15 PM EDT | Severe Thunderstorm Warning | FFC | Dodge | 35 min |
| Jul 23, 9:22 PM EDT | Severe Thunderstorm Warning | FFC | Crisp | 18 min |
| Jul 24, 2:56 PM EDT | Severe Thunderstorm Warning | FFC | Whitfield | 34 min |
| Jul 24, 3:01 PM EDT | Severe Thunderstorm Warning | FFC | Harris, Troup | 34 min |
| Jul 24, 3:30 PM EDT | Severe Thunderstorm Warning | FFC | Forsyth, Fulton, Gwinnett | 35 min |
| Jul 24, 3:47 PM EDT | Severe Thunderstorm Warning | FFC | Cobb | 33 min |
| Jul 24, 3:56 PM EDT | Severe Thunderstorm Warning | FFC | Polk | 34 min |
| Jul 24, 4:04 PM EDT | Severe Thunderstorm Warning | FFC | Bartow | 31 min |
| Jul 24, 4:09 PM EDT | Severe Thunderstorm Warning | FFC | Fulton | 36 min |
| Jul 24, 4:18 PM EDT | Severe Thunderstorm Warning | FFC | Cobb | 32 min |
| Jul 24, 4:25 PM EDT | Severe Thunderstorm Warning | FFC | Polk | 50 min |
| Jul 24, 4:29 PM EDT | Severe Thunderstorm Warning | FFC | Greene, Oconee | 36 min |
| Jul 24, 4:32 PM EDT | Severe Thunderstorm Warning | FFC | Gwinnett | 48 min |
| Jul 24, 4:34 PM EDT | Severe Thunderstorm Warning | FFC | Forsyth | 51 min |
| Jul 24, 4:37 PM EDT | Severe Thunderstorm Warning | FFC | Heard | 48 min |
| Jul 24, 4:39 PM EDT | Severe Thunderstorm Warning | FFC | Fayette | 36 min |
| Jul 24, 4:44 PM EDT | Severe Thunderstorm Warning | FFC | Oglethorpe | 51 min |
| Jul 24, 4:59 PM EDT | Severe Thunderstorm Warning | FFC | Clarke | 46 min |
| Jul 24, 5:02 PM EDT | Severe Thunderstorm Warning | FFC | Clayton | 48 min |
| Jul 24, 5:06 PM EDT | Severe Thunderstorm Warning | FFC | Forsyth, Fulton | 49 min |
| Jul 24, 5:10 PM EDT | Severe Thunderstorm Warning | FFC | Newton | 50 min |
| Jul 24, 5:12 PM EDT | Severe Thunderstorm Warning | FFC | Carroll | 48 min |
| Jul 24, 5:16 PM EDT | Severe Thunderstorm Warning | FFC | Coweta | 49 min |
| Jul 24, 5:20 PM EDT | Severe Thunderstorm Warning | FFC | Henry | 50 min |
| Jul 24, 5:21 PM EDT | Severe Thunderstorm Warning | FFC | Rockdale | 49 min |
| Jul 24, 5:29 PM EDT | Severe Thunderstorm Warning | FFC | DeKalb | 31 min |
| Jul 24, 5:42 PM EDT | Severe Thunderstorm Warning | FFC | Fulton | 48 min |
| Jul 24, 5:51 PM EDT | Severe Thunderstorm Warning | FFC | Butts | 49 min |
| Jul 24, 5:53 PM EDT | Severe Thunderstorm Warning | FFC | Fayette | 47 min |
| Jul 24, 6:02 PM EDT | Severe Thunderstorm Warning | FFC | Newton, Rockdale | 48 min |
| Jul 24, 6:11 PM EDT | Severe Thunderstorm Warning | FFC | Monroe | 49 min |
| Jul 24, 6:21 PM EDT | Severe Thunderstorm Warning | FFC | Jasper | 49 min |
| Jul 24, 6:23 PM EDT | Severe Thunderstorm Warning | FFC | Greene | 47 min |
| Jul 24, 6:32 PM EDT | Severe Thunderstorm Warning | FFC | Morgan | 48 min |
| Jul 24, 6:44 PM EDT | Severe Thunderstorm Warning | FFC | Butts | 36 min |
Nearby
Severe Thunderstorm Warnings in Georgia, 1999Every severe thunderstorm warning in 1999
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.