Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 504, NWS Atlanta, GA

July 22, 1999Sumter County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 22, 1999, 7:01 PM EDT for Sumter County, Georgia. It was in force for 34 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: Jul 22, 1999, 7:01 PM EDT (23:01 UTC)
Expired: Jul 22, 1999, 7:35 PM EDT
In force: 34 min
Issued by: NWS Atlanta, GA
Area: Whole counties

County Sumter County, GA

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.0 hours before the alert went out and 151 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: 463 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 1197 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 22 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 222302 RRA
SVRATL
GAC261-222335-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
701 PM EDT THU JUL 22 1999

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 735 PM EDT

* AT 700 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR  3 MILES EAST OF PLAINS... MOVING SOUTHWEST AT 5 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE...
   PLAINS                      AROUND 720 PM EDT...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
DESTRUCTIVE HAIL AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE T@O
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, Jul 22, 5:00 PM EDT, 2 hours 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
500 PM EDT THU JUL 22 1999

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

420 PM     HELEN                     GA   WIND DAMAGE
07/22/99   WHITE                          POLICE RADIO TOWER BENT OVER
                                          BY WIND

Local storm report, Jul 22, 5:50 PM EDT, 1 hour 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
550 PM EDT THU JUL 22 1999

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

420 PM     HELEN                     GA   WIND DAMAGE
07/22/99   WHITE                          POLICE RADIO TOWER BENT OVER
                                          BY WIND

452 PM     2 E DAHLONEGA             GA   WIND D$AMAGE
07/22/99   LUMPKIN                        TREES BLOWN DOWN

535 PM     JUNO                      GA   WIND DAMAGE
07/22/99   DAWSON                         TREES BLOWN DOWN

Local storm report, Jul 22, 6:37 PM EDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
637 PM EDT THU JUL 22 1999

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

420 PM     HELEN                     GA   WIND DAMAGE
07/22/99   WHITE                          POLICE RADIO TOWER BENT OVER
                                          BY WIND

430 PM     DAHLONEGA                 GA   WIND DAMAGE
07/22/99   LUMPKIN                        TREES BLOWN DOWN

452 PM     2 E DAHLONEGA             GA   WIND DAMAGE
07/22/99   LUMPKIN                        TREES BLOWN DOWN

535 PM     JUNO                      GA   WIND DAMAGE
07/22/99   DAWSON                         TREES BLOWN DOWN

625 PM     2 N MARIETTA              GA   0.75 INCH HAIL
07/22/99   COBB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 8:05 PM EDT	Severe Thunderstorm Warning	FFC	Jefferson	35 min
Jul 22, 4:02 PM EDT	Severe Thunderstorm Warning	FFC	Lumpkin, Union, White	33 min
Jul 22, 4:25 PM EDT	Severe Thunderstorm Warning	FFC	Newton, Rockdale	20 min
Jul 22, 4:33 PM EDT	Severe Thunderstorm Warning	FFC	Lumpkin	32 min
Jul 22, 5:12 PM EDT	Severe Thunderstorm Warning	FFC	Dawson	33 min
Jul 22, 6:20 PM EDT	Severe Thunderstorm Warning	FFC	Cobb	35 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; the sounding from the Mesonet's radiosonde archive.