Alert archive / Georgia / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 474, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Jul 10, 1999, 5:46 PM EDT for Cobb County, Fulton County, Georgia. It was in force for 34 min. 2 reports 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 10, 1999, 5:46 PM EDT (21:46 UTC)
- Expired
- Jul 10, 1999, 6:20 PM EDT
- In force
- 34 min
- Issued by
- NWS Atlanta, GA
- Area
- Whole counties
Counties Cobb County, GA, Fulton County, GA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 10, 6:00 PM EDT | Thunderstorm Wind | Alpharetta, GA | The Fulton county fire department reported trees down and flooded streets. |
| Jul 10, 6:00 PM EDT | Thunderstorm Wind | Marietta, GA | Cobb county 911 reported trees down. One home was hit by a falling tree. |
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, 9.8 hours before the alert went out and 55 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
- 233 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 971 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- -35 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 102147 RRA SVRATL GAC067-121-102220- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PEACHTREE CITY GA 546 PM EDT SAT JUL 10 1999 THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... COBB COUNTY IN NORTHWESTERN GEORGIA NORTHERN FULTON COUNTY IN NORTHWESTERN GEORGIA * UNTIL 620 PM EDT * AT 544 PM... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER RADAR 3 MILES WEST OF SANDY SPRINGS... MOVING EAST AT 20 MPH. * SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE... SANDY SPRINGS AROUND 550 PM... ROSWELL AROUND 600 PM... ALPHARETTA AROUND 615 PM EDT... 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 |
|---|---|---|---|---|
| Jul 10, 5:58 PM EDT | Severe Thunderstorm Warning | FFC | DeKalb, Gwinnett | 47 min |
| Jul 10, 6:57 PM EDT | Severe Thunderstorm Warning | FFC | Fannin, Murray | 33 min |
| Jul 10, 7:12 PM EDT | Severe Thunderstorm Warning | FFC | Cherokee | 33 min |
| Jul 10, 7:18 PM EDT | Severe Thunderstorm Warning | FFC | Bartow | 37 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.