Alert archive / Georgia / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 680, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Aug 25, 1999, 6:11 PM EDT for Newton County, Georgia. It was in force for 19 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
- Aug 25, 1999, 6:11 PM EDT (22:11 UTC)
- Expired
- Aug 25, 1999, 6:30 PM EDT
- In force
- 19 min
- Issued by
- NWS Atlanta, GA
- Area
- Whole counties
County Newton County, GA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 25, 6:11 PM EDT | Hail 1.75 | Porterdale, GA | Two more public reports indicated dime and golf ball size hail. |
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, 10.2 hours before the alert went out and 64 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
- 541 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 754 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
311 WUUS52 KFFC 252214 RRA SVRATL GAC217-252230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PEACHTREE CITY GA 611 PM EDT WED AUG 25 1999 THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NEWTON COUNTY IN NORTHEASTERN GEORGIA * UNTIL 630 PM EDT * AT 611 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER RADAR 4 MILES SOUTHEAST OF COVINGTON OR 3 MILES SOUTHWEST OF HUB JUNCTION... MOVING EAST AT 10 MPH. * SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE... HUB JUNCTION... DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. IF YOU SEE DAMAGE OR LARGE HAIL...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 |
|---|---|---|---|---|
| Aug 25, 5:06 PM EDT | Severe Thunderstorm Warning | FFC | Troup | 34 min |
| Aug 25, 5:42 PM EDT | Severe Thunderstorm Warning | FFC | Newton | 33 min |
| Aug 25, 5:57 PM EDT | Severe Thunderstorm Warning | FFC | Morgan | 33 min |
| Aug 25, 6:04 PM EDT | Severe Thunderstorm Warning | FFC | Cobb, Douglas | 36 min |
| Aug 25, 6:30 PM EDT | Severe Thunderstorm Warning | FFC | Greene, Morgan | 35 min |
| Aug 25, 7:37 PM EDT | Severe Thunderstorm Warning | FFC | DeKalb | 33 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.