Alert archive / Georgia / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 201, NWS Atlanta, GA

July 1, 2002Gwinnett County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 1, 2002, 6:11 PM EDT for Gwinnett County, Georgia. It was in force for 34 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 1, 2002, 6:11 PM EDT (22:11 UTC)
Expired: Jul 1, 2002, 6:45 PM EDT
In force: 34 min
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

County Gwinnett County, GA

The radar

The Atlanta radar (KFFC), 91 km from the middle of the area, began a volume at 22:13 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 1, 6:40 PM EDT	Thunderstorm Wind	Suwanee, GA	The public and several amateur radio operators reported that several trees were blown down in at least two different locations in Suwanee.
Jul 1, 6:40 PM EDT	Hail 1	Suwanee, GA	Numerous reports of hail, ranging in size from dimes to quarters, were received from the public and several amateur radio operators.

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, 10.2 hours before the alert went out and 87 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: 1309 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 1046 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 32 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.

346 
WUUS52 KFFC 012211
SVRATL
GAC135-012245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
610 PM EDT MON JUL 1 2002

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN GWINNETT COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 645 PM EDT

* AT 607 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER SUGAR HILL...MOVING SOUTHWEST AT 10 MPH.

* LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...BERKELEY
LAKE...BUFORD...DULUTH...LAWRENCEVILLE...SUGAR HILL AND SUWANEE.

HAIL TO THE SIZE OF GOLFBALLS AND WIND GUSTS TO 60 MPH CAN BE 
EXPECTED IN THE WARNED AREA.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

LAT...LON 3412 8392 3413 8406 3395 8423 3392 8401

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 8:02 PM EDT	Severe Thunderstorm Warning	FFC	Chattooga	43 min
Jun 30, 8:36 PM EDT	Severe Thunderstorm Warning	FFC	Walker	24 min
Jul 1, 5:08 PM EDT	Severe Thunderstorm Warning	FFC	Paulding	22 min
Jul 1, 5:11 PM EDT	Severe Thunderstorm Warning	FFC	Hall	19 min
Jul 1, 5:31 PM EDT	Severe Thunderstorm Warning	FFC	Hall	29 min
Jul 1, 5:39 PM EDT	Severe Thunderstorm Warning	FFC	Forsyth	31 min
Jul 1, 6:17 PM EDT	Severe Thunderstorm Warning	FFC	Dawson	28 min
Jul 1, 6:46 PM EDT	Severe Thunderstorm Warning	FFC	Gwinnett	29 min
Jul 1, 7:09 PM EDT	Severe Thunderstorm Warning	FFC	Murray	36 min
Jul 1, 7:42 PM EDT	Severe Thunderstorm Warning	FFC	Floyd	33 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2002 Every severe thunderstorm warning in 2002

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.