Alert archive / Georgia / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 421, NWS Atlanta, GA

July 28, 1997Forsyth County, Gwinnett County, Hall County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 28, 1997, 6:33 PM EDT for Forsyth County, Gwinnett County, Hall County, Georgia. It was in force for 27 min. 6 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, 6:33 PM EDT (22:33 UTC)
Expired
Jul 28, 1997, 7:00 PM EDT
In force
27 min
Issued by
NWS Atlanta, GA
Area
Whole counties

Counties Forsyth County, GA, Gwinnett County, GA, Hall County, GA

The radar

The Atlanta radar (KFFC), 104 km from the middle of the area, began a volume at 22:34 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

TimeReportWhereRemark
Jul 28, 6:50 PM EDTThunderstorm Wind 50 EGLilburn, GAThunderstorm winds knocked over a 14 year old Bradford Pear tree. Limbs from several pine trees were also snapped.
Jul 28, 6:55 PM EDTThunderstorm Wind 50 EGLawrenceville, GASeveral trees and limbs were knocked down by thunderstorm winds.
Jul 28, 6:57 PM EDTHail 0.75Buford, GA
Jul 28, 7:00 PM EDTThunderstorm Wind 50 EGFlowery Branch, GAThunderstorm winds knocked down trees and power lines.
Jul 28, 7:10 PM EDTThunderstorm Wind 50 EGCumming, GAThunderstorm winds knocked down several large trees and power lines on Erin Sosbee Road and Bethelview Road.
Jul 28, 7:10 PM EDTHail 0.75Snellville, GA

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, 10.6 hours before the alert went out and 101 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 1997-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 912 joules per kilogram.LCLLFCEL10008507005003002001001 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 1997-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
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 282232 RRA
SVRATL
GAC139-117-135-282300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
633 PM EDT MON JUL 28 1997
 
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  700 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST GEORGIA
 
   ...SOUTHERN HALL COUNTY
 
IN NORTHWEST GEORGIA
 
   ...FORSYTH COUNTY...GWINNETT COUNTY
 
AT 630 PM EATHER RADAR INDICATED AS SEVERE THUNDERSTORM OVER THE
SOUTHERN PORTION OF LAKE LANIER...NORTH OF BUFORD...MOVING SOUTH AT 20
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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 27, 8:09 PM EDTSevere Thunderstorm WarningFFCButts, Jasper, Jones, Monroe51 min
Jul 27, 8:32 PM EDTSevere Thunderstorm WarningFFCBleckley, Houston, Peach43 min
Jul 27, 8:32 PM EDTSevere Thunderstorm WarningFFCCrawford, Lamar, Upson43 min
Jul 27, 9:07 PM EDTSevere Thunderstorm WarningFFCMacon, Talbot, Taylor68 min
Jul 27, 9:07 PM EDTSevere Thunderstorm WarningFFCPike68 min
Jul 27, 9:07 PM EDTSevere Thunderstorm WarningFFCDooly68 min
Jul 27, 9:25 PM EDTSevere Thunderstorm WarningFFCMarion, Schley, Sumter50 min
Jul 27, 9:52 PM EDTSevere Thunderstorm WarningFFCWebster53 min
Jul 28, 4:55 PM EDTSevere Thunderstorm WarningFFCLumpkin, White35 min
Jul 28, 6:15 PM EDTSevere Thunderstorm WarningFFCNewton30 min
Jul 28, 6:50 PM EDTSevere Thunderstorm WarningFFCNewton, Walton25 min
Jul 28, 7:03 PM EDTSevere Thunderstorm WarningFFCGwinnett27 min
Jul 28, 7:14 PM EDTSevere Thunderstorm WarningFFCRockdale31 min
Jul 28, 7:32 PM EDTSevere Thunderstorm WarningFFCDeKalb, Gwinnett28 min
Jul 28, 7:47 PM EDTSevere Thunderstorm WarningFFCHenry, Rockdale28 min
Jul 28, 7:57 PM EDTSevere Thunderstorm WarningFFCMurray, Whitfield33 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1997Every 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.