Alert archive / Georgia / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 423, NWS Atlanta, GA

July 28, 1997Gwinnett County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 28, 1997, 7:03 PM EDT for Gwinnett County, Georgia. It was in force for 27 min. 5 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: Jul 28, 1997, 7:03 PM EDT (23:03 UTC)
Expired: Jul 28, 1997, 7:30 PM EDT
In force: 27 min
Issued by: NWS Atlanta, GA
Area: Whole counties

County Gwinnett County, GA

The radar

The Atlanta radar (KFFC), 83 km from the middle of the area, began a volume at 23:03 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

Time	Report	Where	Remark
Jul 28, 7:10 PM EDT	Hail 0.75	Snellville, GA
Jul 28, 7:15 PM EDT	Hail 0.75	Lilburn, GA
Jul 28, 7:20 PM EDT	Hail 0.75	Norcross, GA
Jul 28, 7:30 PM EDT	Thunderstorm Wind 50 EG	Stone Mtn, GA	Several large tree limbs were blocking Spring Valley Lane.
Jul 28, 7:30 PM EDT	Thunderstorm Wind 50 EG	Buford, GA	Thunderstorm winds knocked over several large tree limbs, one of which crushed patio furniture.

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, 11.1 hours before the alert went out and 79 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: 912 J/kg
Mixed-layer CIN: -120 J/kg
Mixed-layer LCL: 1127 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 65 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 282302 RRA
SVRATL
GAC135-282330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
703 PM EDT MON JUL 28 1997
 
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  730 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST GEORGIA
 
   ...GWINNETT COUNTY
 
AT 700 PM EDT WEATHER RADAR INDICATED A SEVERE THUNDERSTORM NEAR
LAWRENCEVILLE...MOVING SOUTH AT 10 MPH. ANOTHER SEVERE THUNDERSTORM WAS
LOCATED NEAR LILBURN...MOVING SOUTH AT 10 MPH.
 
DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING
ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM
WINDOWS UNTIL THE STORM HAS PASSED. BOATERS, GOLFERS, AND OTHERS
INVOLVED IN OUTSIDE ACTIVITIES SHOULD SEEK SHELTER IMMEDIATELY.
 
IF YOU EXPERIENCE STORM DAMAGE TO STRUCTURES OR TREES...OR HAIL THE
SIZE OF DIMES OR LARGER...PLEASE REPORT IT TO THE NATIONAL WEATHER
SERVICE BY CALLING 770-486-8535.

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 28, 6:01 PM EDT, 1 hour 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
601 PM EDT MON JUL 28 1997

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

524 PM     3 N DAHLONEGA             GA   1.00 inch hail
7/28/97    LUMPKIN                        HAIL THE SIZE OF QUARTERS
                                          REPORTED BY PUBLIC

5PM PM     HELEN                     GA   WIND DAMAGE
7/28/97    WHITE                          TREES DOWN AND POWER LINES
                                          DOWN.  PEA SIZE HAIL.
                                          REPORTED BY WHITE CO. 911

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 8:09 PM EDT	Severe Thunderstorm Warning	FFC	Butts, Jasper, Jones, Monroe	51 min
Jul 27, 8:32 PM EDT	Severe Thunderstorm Warning	FFC	Bleckley, Houston, Peach	43 min
Jul 27, 8:32 PM EDT	Severe Thunderstorm Warning	FFC	Crawford, Lamar, Upson	43 min
Jul 27, 9:07 PM EDT	Severe Thunderstorm Warning	FFC	Macon, Talbot, Taylor	68 min
Jul 27, 9:07 PM EDT	Severe Thunderstorm Warning	FFC	Pike	68 min
Jul 27, 9:07 PM EDT	Severe Thunderstorm Warning	FFC	Dooly	68 min
Jul 27, 9:25 PM EDT	Severe Thunderstorm Warning	FFC	Marion, Schley, Sumter	50 min
Jul 27, 9:52 PM EDT	Severe Thunderstorm Warning	FFC	Webster	53 min
Jul 28, 4:55 PM EDT	Severe Thunderstorm Warning	FFC	Lumpkin, White	35 min
Jul 28, 6:15 PM EDT	Severe Thunderstorm Warning	FFC	Newton	30 min
Jul 28, 6:33 PM EDT	Severe Thunderstorm Warning	FFC	Forsyth, Gwinnett, Hall	27 min
Jul 28, 6:50 PM EDT	Severe Thunderstorm Warning	FFC	Newton, Walton	25 min
Jul 28, 7:14 PM EDT	Severe Thunderstorm Warning	FFC	Rockdale	31 min
Jul 28, 7:32 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb, Gwinnett	28 min
Jul 28, 7:47 PM EDT	Severe Thunderstorm Warning	FFC	Henry, Rockdale	28 min
Jul 28, 7:57 PM EDT	Severe Thunderstorm Warning	FFC	Murray, Whitfield	33 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1997 Every severe thunderstorm warning in 1997

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.