Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 574, NWS Atlanta, GA

August 12, 1999Carroll County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 12, 1999, 8:53 PM EDT for Carroll County, Georgia. It was in force for 22 min. 3 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: Aug 12, 1999, 8:53 PM EDT (00:53 UTC)
Expired: Aug 12, 1999, 9:15 PM EDT
In force: 22 min
Issued by: NWS Atlanta, GA
Area: Whole counties

County Carroll County, GA

What was reported inside it

Time	Report	Where	Remark
Aug 12, 9:00 PM EDT	Hail 0.75	Bowdon, GA	The public and a fire station reported 3/4 inch hail.
Aug 12, 9:14 PM EDT	Hail 2	Mt Zion, GA	The public reported 11/2 to 2 inch diameter hail.
Aug 12, 9:20 PM EDT	Thunderstorm Wind	Bowdon, GA	Wooden trusses for a new church were blown down during a strong thunderstorm.

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

Birmingham, AL (KBMX), launched 00:00Z, 0.9 hours before the alert went out and 164 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: 1947 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 1650 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 51 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.

000 
TTAA00 KATL 130050 RRA
SVRATL
GAC045-130115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
853 PM EDT THU AUG 12 1999

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 915 PM EDT

* AT 851 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR  9 MILES NORTHWEST OF CARROLLTON OR 2 MILES NORTH OF MOUNT
  ZION... MOVING SOUTH AT 5 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE...
  BOWDON JUNCTION...
  MOUNT ZION...

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.

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

Local storm report, Aug 12, 5:32 PM EDT, 3 hours 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
532 PM EDT THU AUG 12 1999

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

520 PM     AMERICUS                  GA   WIND DAMAGE
08/12/99   SUMTER                         SEVERAL TREES BLOWN DOWN

Local storm report, Aug 12, 6:35 PM EDT, 2 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
635 PM EDT THU AUG 12 1999

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

520 PM     AMERICUS                  GA   WIND DAMAGE
08/12/99   SUMTER                         SEVERAL TREES BLOWN DOWN

623 PM     BUENA VISTA               GA   WIND DAMAGE
08/12/99   MARION                         SEVERAL TREES BLOWN DOWN

Local storm report, Aug 12, 8:00 PM EDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
800 PM EDT THU AUG 12 1999

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

520 PM     AMERICUS                  GA   WIND DAMAGE
08/12/99   SUMTER                         SEVERAL TREES BLOWN DOWN

615 PM     BUENA VISTA               GA   0.75 INCH HAIL
08/12/99   MARION

623 PM     BUENA VISTA               GA   WIND DAMAGE
08/12/99   MARION                         SEVERAL TREES BLOWN DOWN

Local storm report, Aug 12, 8:00 PM EDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
800 PM EDT THU AUG 12 1999

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

520 PM     AMERICUS                  GA   WIND DAMAGE
08/12/99   SUMTER                         SEVERAL TREES BLOWN DOWN

615 PM     BUENA VISTA               GA   0.75 INCH HAIL
08/12/99   MARION

623 PM     BUENA VISTA               GA   WIND DAMAGE
08/12/99   MARION                         SEVERAL TREES BLOWN DOWN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 9:12 PM EDT	Severe Thunderstorm Warning	FFC	Carroll	33 min
Aug 13, 1:39 PM EDT	Severe Thunderstorm Warning	FFC	Crawford	36 min
Aug 13, 1:46 PM EDT	Severe Thunderstorm Warning	FFC	Lumpkin	34 min
Aug 13, 2:03 PM EDT	Severe Thunderstorm Warning	FFC	Monroe	37 min
Aug 13, 2:24 PM EDT	Severe Thunderstorm Warning	FFC	Jones	36 min
Aug 13, 2:38 PM EDT	Severe Thunderstorm Warning	FFC	Taylor	32 min
Aug 13, 2:51 PM EDT	Severe Thunderstorm Warning	FFC	Jasper	34 min
Aug 13, 3:04 PM EDT	Severe Thunderstorm Warning	FFC	Oconee	36 min
Aug 13, 3:10 PM EDT	Severe Thunderstorm Warning	FFC	Taylor	35 min
Aug 13, 3:26 PM EDT	Severe Thunderstorm Warning	FFC	Newton	34 min
Aug 13, 3:33 PM EDT	Severe Thunderstorm Warning	FFC	Henry	32 min
Aug 13, 3:40 PM EDT	Severe Thunderstorm Warning	FFC	Morgan	35 min
Aug 13, 4:04 PM EDT	Severe Thunderstorm Warning	FFC	Meriwether	36 min
Aug 13, 4:12 PM EDT	Severe Thunderstorm Warning	FFC	Dooly	33 min
Aug 13, 4:18 PM EDT	Severe Thunderstorm Warning	FFC	Sumter	32 min
Aug 13, 4:38 PM EDT	Severe Thunderstorm Warning	FFC	Pulaski	32 min
Aug 13, 4:50 PM EDT	Severe Thunderstorm Warning	FFC	Sumter	35 min
Aug 13, 5:35 PM EDT	Severe Thunderstorm Warning	FFC	Gwinnett	35 min
Aug 13, 5:40 PM EDT	Severe Thunderstorm Warning	FFC	Harris	35 min
Aug 13, 6:13 PM EDT	Severe Thunderstorm Warning	FFC	Gwinnett	37 min
Aug 13, 6:15 PM EDT	Severe Thunderstorm Warning	FFC	Harris	35 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1999 Every 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.