Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 503, NWS Atlanta, GA

July 22, 1999Cobb County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 22, 1999, 6:20 PM EDT for Cobb County, Georgia. It was in force for 35 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: Jul 22, 1999, 6:20 PM EDT (22:20 UTC)
Expired: Jul 22, 1999, 6:55 PM EDT
In force: 35 min
Issued by: NWS Atlanta, GA
Area: Whole counties

County Cobb County, GA

What was reported inside it

Time	Report	Where	Remark
Jul 22, 6:25 PM EDT	Hail 0.88	Marietta, GA	The public reported nickel size hail.

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, 10.3 hours before the alert went out and 64 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 222221 RRA
SVRATL
GAC067-222255-

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  COBB COUNTY IN NORTHWESTERN GEORGIA

* UNTIL 655 PM EDT

* AT 619 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR  3 MILES NORTH OF MARIETTA... MOVING SOUTHWEST AT 5 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE...
   MARIETTA                    AROUND 645 PM EDT...

DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND DEADLY LIGHTNING
ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. IF YOU SEE DAMAGE OR
LARGE HA0IL...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, 1 hour 20 minutes 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, 30 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

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, 7:01 PM EDT	Severe Thunderstorm Warning	FFC	Sumter	34 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.