Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 11, NWS Atlanta, GA

January 18, 19994 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jan 18, 1999, 5:19 AM EST for 4 counties in Georgia. It was in force for 31 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
Jan 18, 1999, 5:19 AM EST (10:19 UTC)
Expired
Jan 18, 1999, 5:50 AM EST
In force
31 min
Issued by
NWS Atlanta, GA
Area
Whole counties

Counties Bartow County, GA, Cherokee County, GA, Gordon County, GA, Pickens County, GA

The radar

The Atlanta radar (KFFC), 111 km from the middle of the area, began a volume at 10:18 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.

What was reported inside it

TimeReportWhereRemark
Jan 18, 5:30 AM ESTHail 0.75Calhoun, GAA report from the public indicated "big size" hail hitting the tin roof of her home between Calhoun and Fairmount. The hail was probably at least 3/4 of an inch in diameter.

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 watch it was issued in

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

IssuedProductOfficeLasted
Jan 18, 2:15 AM ESTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 10.3 hours before the alert went out and 111 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 1999-01-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 378 joules per kilogram.LCLLFCEL10008507005003002001001 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 1999-01-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 617 square meters per square second.1939587897117Sfc1 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
378 J/kg
Mixed-layer CIN
-82 J/kg
Mixed-layer LCL
721 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
617 m²/s²
0-3 km storm-relative helicity
700 m²/s²
Significant tornado parameter
1.2
Supercell composite
5.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

999 
WUUS1 KATL 181020 RRA
SVRATL
GAC015-057-129-227-181050-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
519 AM EST MON JAN 18 1999

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BARTOW COUNTY IN NORTHWESTERN GEORGIA
  CHEROKEE COUNTY IN NORTHWESTERN GEORGIA
  GORDON COUNTY IN NORTHWESTERN GEORGIA
  PICKENS COUNTY IN NORTHWESTERN GEORGIA

* UNTIL 550 AM EST

* AT 516 AM EST... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR  15 MILES SOUTHWEST OF LUDVILLE... MOVING EAST AT 65 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE...
   WALESKA                     AROUND 525 AM EST
   LUDVILLE                    AROUND 530 AM EST
   BALL GROUND                 AROUND 535 AM EST
   JASPER                      AROUND 535 AM EST
   MARBLEHILL                  AROUND 540 AM EST

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 204.

$$ KDF/VM

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 17, 7:31 PM ESTSevere Thunderstorm WarningFFCMonroe44 min
Jan 17, 8:16 PM ESTSevere Thunderstorm WarningFFCLaurens49 min
Jan 17, 8:57 PM ESTSevere Thunderstorm WarningFFCTreutlen33 min
Jan 17, 9:17 PM ESTSevere Thunderstorm WarningFFCEmanuel48 min
Jan 18, 4:24 AM ESTSevere Thunderstorm WarningFFCCrisp36 min
Jan 18, 4:43 AM ESTSevere Thunderstorm WarningFFCFloyd, Polk47 min
Jan 18, 4:45 AM ESTSevere Thunderstorm WarningFFCDodge, Pulaski35 min
Jan 18, 5:04 AM ESTSevere Thunderstorm WarningFFCLaurens51 min
Jan 18, 5:24 AM ESTSevere Thunderstorm WarningFFCWilcox31 min
Jan 18, 5:36 AM ESTSevere Thunderstorm WarningFFCJohnson34 min
Jan 18, 5:39 AM ESTSevere Thunderstorm WarningFFCCrisp, Wilcox36 min
Jan 18, 5:56 AM ESTSevere Thunderstorm WarningFFCJefferson34 min
Jan 18, 6:00 AM ESTSevere Thunderstorm WarningFFCPulaski35 min
Jan 18, 7:30 AM ESTSevere Thunderstorm WarningFFCJefferson35 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; radar from the NEXRAD Level II archive.