Alert archive / Georgia / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 645, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Aug 20, 1999, 6:31 PM EDT for Houston 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 20, 1999, 6:31 PM EDT (22:31 UTC)
- Expired
- Aug 20, 1999, 6:50 PM EDT
- In force
- 19 min
- Issued by
- NWS Atlanta, GA
- Area
- Whole counties
County Houston County, GA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 20, 6:31 PM EDT | Hail 1.75 | Warner Robins, GA | The public continued to report up to golf ball size hail in the Warner Robins and Bonaire areas. |
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, 10.5 hours before the alert went out and 128 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
- 1278 J/kg
- Mixed-layer CIN
- -137 J/kg
- Mixed-layer LCL
- 1226 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KATL 202231 RRA SVRATL GAC153-202250- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PEACHTREE CITY GA 631 PM EDT FRI AUG 20 1999 THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... HOUSTON COUNTY IN CENTRAL GEORGIA * UNTIL 650 PM EDT * AT 631 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER RADAR 5 MILES NORTHEAST OF PERRY OR 2 MILES WEST OF KATHLEEN... MOVING EAST AT 5 MPH. * SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE... BONAIRE... KATHLEEN... CLAYBED... DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. IF YOU SEE DAMA\GE OR LARGE HAIL...CALL THE NATIONAL WEATHER SERVICE AT 770-486-1133 AT EXTENSION 2 0 4.
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, Aug 20, 1:09 PM EDT, 5 hours 22 minutes before
GAZ021>025-027-031>039-041>062-066>076-078>086-091>098-103>113- 201830- NORTH AND CENTRAL GEORGIA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE PEACHTREE CITY GA 109 PM EDT FRI AUG 20 1999 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING OVER MUCH OF NORTH AND CENTRAL GEORGIA. THE RISK AREA INCLUDES CARROLLTON...ATLANTA...GAINESVILLE...ATHENS AND LOCATIONS SOUTH. THE ATMOSPHERE OVER NORTH AND CENTRAL GEORGIA IS HIGHLY UNSTABLE. THIS ALLOWS AIR TO RISE EASILY. AS A COLD FRONT IN THE FAR NORTH GEORGIA MOUNTAINS MOVES SLOWLY SOUTH THIS AFTERNOON...IT WILL PROVIDE ADDITIONAL LIFT. AS A RESULT...SCATTERED STRONG THUNDERSTORMS WILL DEVELOP. A FEW OF THE THUNDERSTORMS COULD BECOME SEVERE WITH THE MAIN THREATS BEING LARGE HAIL AND DAMAGING WINDS. SPOTTERS AND EMERGENCY MANAGERS IN NORTH AND CENTRAL GEORGIA SHOULD BE PREPARED FOR POSSIBLE ACTIVATION LATER TODAY.
Special weather statement, Aug 20, 1:09 PM EDT, 5 hours 22 minutes before
GAZ021>025-027-031>039-041>062-066>076-078>086-091>098-103>113- 201830- NORTH AND CENTRAL GEORGIA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE PEACHTREE CITY GA 109 PM EDT FRI AUG 20 1999 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING OVER MUCH OF NORTH AND CENTRAL GEORGIA. THE RISK AREA INCLUDES CARROLLTON...ATLANTA...GAINESVILLE...ATHENS AND LOCATIONS SOUTH. THE ATMOSPHERE OVER NORTH AND CENTRAL GEORGIA IS HIGHLY UNSTABLE. THIS ALLOWS AIR TO RISE EASILY. AS A COLD FRONT IN THE FAR NORTH GEORGIA MOUNTAINS MOVES SLOWLY SOUTH THIS AFTERNOON...IT WILL PROVIDE ADDITIONAL LIFT. AS A RESULT...SCATTERED STRONG THUNDERSTORMS WILL DEVELOP. A FEW OF THE THUNDERSTORMS COULD BECOME SEVERE WITH THE MAIN THREATS BEING LARGE HAIL AND DAMAGING WINDS. SPOTTERS AND EMERGENCY MANAGERS IN NORTH AND CENTRAL GEORGIA SHOULD BE PREPARED FOR POSSIBLE ACTIVATION LATER TODAY.
The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 2:19 AM EDT | Severe Thunderstorm Warning | FFC | Paulding | 36 min |
| Aug 20, 2:49 AM EDT | Severe Thunderstorm Warning | FFC | Jefferson | 36 min |
| Aug 20, 4:36 AM EDT | Severe Thunderstorm Warning | FFC | Washington | 34 min |
| Aug 20, 5:11 AM EDT | Severe Thunderstorm Warning | FFC | Washington | 34 min |
| Aug 20, 3:13 PM EDT | Severe Thunderstorm Warning | FFC | Putnam | 37 min |
| Aug 20, 3:20 PM EDT | Severe Thunderstorm Warning | FFC | Jefferson | 35 min |
| Aug 20, 4:00 PM EDT | Severe Thunderstorm Warning | FFC | Jefferson | 35 min |
| Aug 20, 4:07 PM EDT | Severe Thunderstorm Warning | FFC | Harris | 33 min |
| Aug 20, 4:20 PM EDT | Severe Thunderstorm Warning | FFC | Jones | 35 min |
| Aug 20, 4:22 PM EDT | Severe Thunderstorm Warning | FFC | Hancock | 33 min |
| Aug 20, 4:43 PM EDT | Severe Thunderstorm Warning | FFC | Bibb | 17 min |
| Aug 20, 4:45 PM EDT | Severe Thunderstorm Warning | FFC | Douglas, Fulton | 35 min |
| Aug 20, 4:47 PM EDT | Severe Thunderstorm Warning | FFC | Twiggs | 33 min |
| Aug 20, 4:57 PM EDT | Severe Thunderstorm Warning | FFC | Harris | 33 min |
| Aug 20, 5:01 PM EDT | Severe Thunderstorm Warning | FFC | Bibb | 34 min |
| Aug 20, 5:04 PM EDT | Severe Thunderstorm Warning | FFC | Wilkinson | 36 min |
| Aug 20, 5:23 PM EDT | Severe Thunderstorm Warning | FFC | Twiggs | 37 min |
| Aug 20, 5:36 PM EDT | Severe Thunderstorm Warning | FFC | Madison | 34 min |
| Aug 20, 5:41 PM EDT | Severe Thunderstorm Warning | FFC | Jefferson, Johnson | 34 min |
| Aug 20, 5:47 PM EDT | Severe Thunderstorm Warning | FFC | Jackson | 33 min |
| Aug 20, 5:48 PM EDT | Severe Thunderstorm Warning | FFC | Emanuel | 52 min |
| Aug 20, 5:57 PM EDT | Severe Thunderstorm Warning | FFC | Houston, Peach | 33 min |
| Aug 20, 6:05 PM EDT | Severe Thunderstorm Warning | FFC | Jasper | 35 min |
| Aug 20, 6:28 PM EDT | Severe Thunderstorm Warning | FFC | Bleckley | 32 min |
| Aug 20, 6:47 PM EDT | Severe Thunderstorm Warning | FFC | Butts, Jasper | 33 min |
| Aug 20, 6:50 PM EDT | Severe Thunderstorm Warning | FFC | Dodge | 35 min |
| Aug 20, 6:51 PM EDT | Severe Thunderstorm Warning | FFC | Clarke | 34 min |
| Aug 20, 6:52 PM EDT | Severe Thunderstorm Warning | FFC | Oglethorpe | 33 min |
| Aug 20, 6:53 PM EDT | Severe Thunderstorm Warning | FFC | Putnam | 37 min |
| Aug 20, 7:26 PM EDT | Severe Thunderstorm Warning | FFC | Oglethorpe | 19 min |
| Aug 20, 7:28 PM EDT | Severe Thunderstorm Warning | FFC | Crisp, Dooly | 32 min |
| Aug 20, 7:30 PM EDT | Severe Thunderstorm Warning | FFC | Wilcox | 35 min |
| Aug 20, 7:31 PM EDT | Severe Thunderstorm Warning | FFC | Clarke | 34 min |
| Aug 20, 7:42 PM EDT | Severe Thunderstorm Warning | FFC | Jackson | 18 min |
| Aug 20, 7:44 PM EDT | Severe Thunderstorm Warning | FFC | Montgomery, Wheeler | 36 min |
| Aug 20, 7:52 PM EDT | Severe Thunderstorm Warning | FFC | Madison | 18 min |
| Aug 20, 7:56 PM EDT | Severe Thunderstorm Warning | FFC | Telfair | 34 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.