Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 1, NWS Atlanta, GA

January 17, 1999Sumter County, Webster County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jan 17, 1999, 5:18 PM EST for Sumter County, Webster County, Georgia. It was in force for 32 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
Jan 17, 1999, 5:18 PM EST (22:18 UTC)
Expired
Jan 17, 1999, 5:50 PM EST
In force
32 min
Issued by
NWS Atlanta, GA
Area
Whole counties

Counties Sumter County, GA, Webster County, GA

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.3 hours before the alert went out and 148 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 1999-01-17Temperature 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 1999-01-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 119 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
1480 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
119 m²/s²
0-3 km storm-relative helicity
179 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 172221 RRA
SVRATL
GAC261-307-172250-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
518 PM EST SUN JAN 17 1999

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SUMTER COUNTY IN WEST CENTRAL GEORGIA
  WEBSTER COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 550 PM EST

* AT 517 PM EST... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR  13 MILES SOUTHWEST OF PLAINS... MOVING NORTHEAST AT 30 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE...
   PLAINS                      AROUND 540 PM EST
   SUMTER                      AROUND 545 PM EST
   FRIENDSHIP                  AROUND 545 PM EST
   CONCORD                     AROUND 550 PM 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.

$$ LEW

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, Jan 17, 12:31 PM EST, 4 hours 47 minutes before
GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
091>098-103>113-180300-

NORTH AND CENTRAL GEORGIA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1231 PM EST SUN JAN 17 1999

AN ISOLATED SEVERE THUNDERSTORM IS POSSIBLE OVER NORTH AND MOST OF
CENTRAL GEORGIA LATE THIS AFTERNOON AND INTO THIS EVENING. THE
GREATEST THREAT IS FOR THE AREA WEST OF A LINE FROM BLUERIDGE TO
ATLANTA TO LAGRANGE.

SHOWERS AND A FEW THUNDERSTORMS ARE EXPECTED TO SPREAD ACROSS THE
STATE FROM ALABAMA LATER THIS AFTERNOON AND CONTINUE INTO TONIGHT
WELL HEAD OF A COLD FRONT THAT WILL MOVE INTO NORTHWEST GEORGIA
SUNDAY MORNING. THE MOST LIKELY TIME FOR THE DEVELOPMENT OF AN
ISOLATED SEVERE STORM ASSOCIATED WITH THIS SYSTEM WILL BE BETWEEN 6
PM AND 10 PM EST.

THE MOST LIKELY DANGER ASSOCIATED WITH THE THUNDERSTORMS WILL BE
DAMAGING WINDS.

THE NATIONAL WEATHER SERVICE WILL MONITOR THIS SITUATION. STORM
SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL SHOULD BE AVAILABLE FOR
ACTIVATION LATER THIS AFTERNOON AND EVENING IN THE EVENT THE
THUNDERSTORMS BECOME SEVERE.
Special weather statement, Jan 17, 12:40 PM EST, 4 hours 38 minutes before
GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
091>098-103>113-180300-

NORTH AND CENTRAL GEORGIA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1240 PM EST SUN JAN 17 1999

AN ISOLATED SEVERE THUNDERSTORM IS POSSIBLE OVER NORTH AND MOST OF
CENTRAL GEORGIA LATE THIS AFTERNOON AND INTO THIS EVENING. THE
GREATEST THREAT IS FOR THE AREA WEST OF A LINE FROM BLUERIDGE TO
ATLANTA TO LAGRANGE.

SHOWERS AND A FEW THUNDERSTORMS ARE EXPECTED TO SPREAD ACROSS THE
STATE FROM ALABAMA LATER THIS AFTERNOON AND CONTINUE INTO TONIGHT
WELL HEAD OF A COLD FRONT THAT WILL MOVE INTO NORTHWEST GEORGIA
MONDAY MORNING. THE MOST LIKELY TIME FOR THE DEVELOPMENT OF AN
ISOLATED SEVERE STORM ASSOCIATED WITH THIS SYSTEM WILL BE BETWEEN 6
PM AND 10 PM EST.

THE MOST LIKELY DANGER ASSOCIATED WITH THE THUNDERSTORMS WILL BE
DAMAGING WINDS.

THE NATIONAL WEATHER SERVICE WILL MONITOR THIS SITUATION. STORM
SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL SHOULD BE AVAILABLE FOR
ACTIVATION LATER THIS AFTERNOON AND EVENING IN THE EVENT THE
THUNDERSTORMS BECOME SEVERE.

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 17, 6:06 PM ESTSevere Thunderstorm WarningFFCCrisp, Sumter49 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.