Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 570, NWS Atlanta, GA

August 12, 1999Marion County, Talbot County, Taylor County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 12, 1999, 5:55 PM EDT for Marion County, Talbot County, Taylor County, Georgia. It was in force for 35 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: Aug 12, 1999, 5:55 PM EDT (21:55 UTC)
Expired: Aug 12, 1999, 6:30 PM EDT
In force: 35 min
Issued by: NWS Atlanta, GA
Area: Whole counties

Counties Marion County, GA, Talbot County, GA, Taylor County, GA

What was reported inside it

Time	Report	Where	Remark
Aug 12, 6:15 PM EDT	Hail 0.75	Buena Vista, GA
Aug 12, 6:15 PM EDT	Thunderstorm Wind	Buena Vista, GA	The Marion county sheriff's office and the 911 office reported several trees and power lines down. There was also a report of 3/4 inch 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

Birmingham, AL (KBMX), launched 12:00Z, 9.9 hours before the alert went out and 230 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: 2056 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 1175 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: -3 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 122153 RRA
SVRATL
GAC197-263-269-122230-

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MARION COUNTY IN WEST CENTRAL GEORGIA
  TALBOT COUNTY IN WEST CENTRAL GEORGIA
  TAYLOR COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 630 PM EDT

* AT 554 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR  17 MILES NORTH OF BUENA VISTA OR 2 MILES SOUTH OF JUNCTION
  CITY... MOVING SOUTH AT 5 MPH.

* THIS STORM WILL REMAIN OVER RURAL AREAS.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
DESTRUCTIVEt HAIL AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. 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, 23 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

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 4:58 PM EDT	Severe Thunderstorm Warning	FFC	Sumter	32 min
Aug 12, 5:23 PM EDT	Severe Thunderstorm Warning	FFC	Talbot, Taylor	32 min
Aug 12, 6:08 PM EDT	Severe Thunderstorm Warning	FFC	Schley	32 min
Aug 12, 6:18 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Meriwether	32 min
Aug 12, 6:32 PM EDT	Severe Thunderstorm Warning	FFC	Marion	33 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.