Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 608, NWS Atlanta, GA

August 19, 1999Macon County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 19, 1999, 2:55 PM EDT for Macon 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 19, 1999, 2:55 PM EDT (18:55 UTC)
Expired
Aug 19, 1999, 3:30 PM EDT
In force
35 min
Issued by
NWS Atlanta, GA
Area
Whole counties

County Macon County, GA

What was reported inside it

TimeReportWhereRemark
Aug 19, 3:00 PM EDTHail 1Oglethorpe, GA
Aug 19, 3:00 PM EDTThunderstorm WindOglethorpe, GAMacon county 911 reported nickel to quarter size hail and power lines blown down.

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, 6.9 hours before the alert went out and 120 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 12:00Z on 1999-08-19Temperature 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 12:00Z on 1999-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 square meters per square second.1939Sfc1 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
2185 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
10 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.

913 
WUUS52 KFFC 191855 RRA
SVRATL
GAC193-191930-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
255 PM EDT THU AUG 19 1999

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MACON COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 330 PM EDT

* AT 255 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR  1 MILE NORTH OF OGLETHORPE... MOVING SOUTH AT 5 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE...
  OGLETHORPE...

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

Special weather statement, Aug 19, 10:15 AM EDT, 4 hours 40 minutes before
GAZ001>009-011>016-019>025-027-030>039-041-043>051-062-191700-

NORTH AND CENTRAL GEORGIA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1015 AM EDT THU AUG 19 1999

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING OVER THE NORTHERN THIRD OF GEORGIA. THE RISK AREA INCLUDES
ATLANTA AND ATHENS.

SURFACE WINDS CONVERGE ALONG A LINE FROM WEST OF ATLANTA...THROUGH
ATLANTA...TO THE AUGUSTA AREA. THE CONVERGENCE WILL CAUSE AIR NEAR
THE SURFACE TO RISE. ALSO...A COLD AIR MASS APPROACHING NORTH GEORGIA
FROM THE TENNESSEE VALLEY WILL INCREASE THE RISING MOTION THROUGH A
DEEP LAYER OF THE ATMOSPHERE. AS A RESULT...WIDELY SCATTERED
THUNDERSTORMS WILL DEVELOP EARLY THIS AFTERNOON AND BECOME MORE
NUMEROUS BY THIS EVENING.

A FEW OF THE THUNDERSTORMS COULD BECOME SEVERE WITH THE MAIN
THREATS BEING LARGE HAIL AND DAMAGING WINDS.

SPOTTERS AND EMERGENCY MANAGERS IN NORTH GEORGIA SHOULD BE PREPARED
FOR POSSIBLE ACTIVATION.
Special weather statement, Aug 19, 10:15 AM EDT, 4 hours 40 minutes before
GAZ001>009-011>016-019>025-027-030>039-041-043>051-062-191700-

NORTH AND CENTRAL GEORGIA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1015 AM EDT THU AUG 19 1999

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING OVER THE NORTHERN THIRD OF GEORGIA. THE RISK AREA INCLUDES
ATLANTA AND ATHENS.

SURFACE WINDS CONVERGE ALONG A LINE FROM WEST OF ATLANTA...THROUGH
ATLANTA...TO THE AUGUSTA AREA. THE CONVERGENCE WILL CAUSE AIR NEAR
THE SURFACE TO RISE. ALSO...A COLD AIR MASS APPROACHING NORTH GEORGIA
FROM THE TENNESSEE VALLEY WILL INCREASE THE RISING MOTION THROUGH A
DEEP LAYER OF THE ATMOSPHERE. AS A RESULT...WIDELY SCATTERED
THUNDERSTORMS WILL DEVELOP EARLY THIS AFTERNOON AND BECOME MORE
NUMEROUS BY THIS EVENING.

A FEW OF THE THUNDERSTORMS COULD BECOME SEVERE WITH THE MAIN
THREATS BEING LARGE HAIL AND DAMAGING WINDS.

SPOTTERS AND EMERGENCY MANAGERS IN NORTH GEORGIA SHOULD BE PREPARED
FOR POSSIBLE ACTIVATION.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 2:16 PM EDTSevere Thunderstorm WarningFFCTaylor34 min
Aug 19, 3:32 PM EDTSevere Thunderstorm WarningFFCHouston, Peach33 min
Aug 19, 4:03 PM EDTSevere Thunderstorm WarningFFCHouston, Twiggs32 min
Aug 19, 4:06 PM EDTSevere Thunderstorm WarningFFCWashington34 min
Aug 19, 4:28 PM EDTSevere Thunderstorm WarningFFCEmanuel37 min
Aug 19, 4:53 PM EDTSevere Thunderstorm WarningFFCJohnson, Laurens32 min
Aug 19, 5:02 PM EDTSevere Thunderstorm WarningFFCJefferson33 min
Aug 19, 5:25 PM EDTSevere Thunderstorm WarningFFCLaurens35 min
Aug 19, 5:33 PM EDTSevere Thunderstorm WarningFFCWheeler32 min
Aug 19, 5:59 PM EDTSevere Thunderstorm WarningFFCLaurens36 min
Aug 19, 6:22 PM EDTSevere Thunderstorm WarningFFCWilcox33 min
Aug 19, 7:02 PM EDTSevere Thunderstorm WarningFFCTelfair33 min
Aug 19, 7:33 PM EDTSevere Thunderstorm WarningFFCTelfair32 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.