Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 42, NWS Atlanta, GA

February 27, 1999Rockdale County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Feb 27, 1999, 11:03 PM EST for Rockdale County, Georgia. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Feb 27, 1999, 11:03 PM EST (04:03 UTC)
Expired
Feb 27, 1999, 11:50 PM EST
In force
47 min
Issued by
NWS Atlanta, GA
Area
Whole counties

County Rockdale County, GA

The radar

The Atlanta radar (KFFC), 60 km from the middle of the area, began a volume at 04:04 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Feb 27, 9:00 PM ESTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 4.1 hours before the alert went out and 54 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 00:00Z on 1999-02-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 1999-02-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 271 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
836 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
271 m²/s²
0-3 km storm-relative helicity
325 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.

999 
WUUS1 KATL 280405 RRA
SVRATL
GAC151-199-231-247-255-280450-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1103 PM EST SAT FEB 27 1999

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HENRY COUNTY IN NORTHWESTERN GEORGIA
  MERIWETHER COUNTY IN WEST CENTRAL GEORGIA
  PIKE COUNTY IN WEST CENTRAL GEORGIA
  ROCKDALE COUNTY IN NORTHWESTERN GEORGIA
  SPALDING COUNTY IN NORTHWESTERN GEORGIA

* UNTIL 1150 PM EST

* AT 1101 PM EST... DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS FROM JONESBORO TO NEWNAN TO LAGRANGE MOVING EAST
  NEAR 50 MPH.


* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE...CONYERS...
  MCDONOUGH...GRIFFIN...ZEBULON AND GREENVILLE.


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
EXTENSION 2 0 4.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 27, 8:58 PM ESTSevere Thunderstorm WarningFFCDade, Walker42 min
Feb 27, 9:20 PM ESTSevere Thunderstorm WarningFFCFloyd, Haralson, Polk45 min
Feb 27, 9:20 PM ESTSevere Thunderstorm WarningFFCChattooga45 min
Feb 27, 9:39 PM ESTSevere Thunderstorm WarningFFCCarroll, Heard46 min
Feb 27, 9:57 PM ESTSevere Thunderstorm WarningFFCDouglas, Paulding48 min
Feb 27, 10:13 PM ESTSevere Thunderstorm WarningFFCBartow, Cobb47 min
Feb 27, 10:23 PM ESTSevere Thunderstorm WarningFFCCoweta, Fulton62 min
Feb 27, 10:32 PM ESTSevere Thunderstorm WarningFFCCherokee48 min
Feb 27, 10:34 PM ESTSevere Thunderstorm WarningFFCTroup36 min
Feb 27, 10:45 PM ESTSevere Thunderstorm WarningFFCClayton, DeKalb45 min
Feb 27, 10:45 PM ESTSevere Thunderstorm WarningFFCForsyth45 min
Feb 27, 10:45 PM ESTSevere Thunderstorm WarningFFCFayette45 min
Feb 27, 10:46 PM ESTSevere Thunderstorm WarningFFCHeard34 min
Feb 27, 11:03 PM ESTSevere Thunderstorm WarningFFCHenry, Meriwether, Pike, Spalding47 min
Feb 27, 11:21 PM ESTSevere Thunderstorm WarningFFCHarris, Talbot34 min
Feb 27, 11:24 PM ESTSevere Thunderstorm WarningFFCNewton, Walton36 min
Feb 27, 11:27 PM ESTSevere Thunderstorm WarningFFCLamar, Upson33 min
Feb 27, 11:47 PM ESTSevere Thunderstorm WarningFFCCrawford, Taylor33 min
Feb 27, 11:47 PM ESTSevere Thunderstorm WarningFFCButts, Monroe33 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.