Alert archive / Georgia / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 59, NWS Atlanta, GA

June 12, 2004Gwinnett County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jun 12, 2004, 9:12 PM EDT for Gwinnett County, Georgia. It was in force for 33 min. 3 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: Jun 12, 2004, 9:12 PM EDT (01:12 UTC)
Expired: Jun 12, 2004, 9:45 PM EDT
In force: 33 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), 90 km from the middle of the area, began a volume at 01:16 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
Jun 12, 9:23 PM EDT	HAIL 0.75	Lawrenceville, GA
Jun 12, 9:30 PM EDT	HAIL 1	Suwanee, GA
Jun 12, 9:40 PM EDT	HAIL 0.88	Suwanee, GA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.2 hours before the alert went out and 86 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: 1990 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1563 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 23 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.

306 
WUUS52 KFFC 130112
SVRATL
GAC135-130145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
912 PM EDT SAT JUN 12 2004

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 945 PM EDT

* AT 906 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER SUWANEE...MOVING NORTHEAST AT 5 MPH.

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

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

EXCESSIVE LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IF
POSSIBLE. STAY AWAY FROM WINDOWS AND DOORS. AVOID USING TELEPHONES OR
ELECTRICAL APPLIANCES.

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 3401 8411 3389 8395 3409 8385 3416 8406

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 10:14 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb, Henry, Rockdale	31 min
Jun 12, 10:25 PM EDT	Severe Thunderstorm Warning	FFC	Jefferson	35 min
Jun 12, 10:47 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb	28 min
Jun 12, 11:40 PM EDT	Severe Thunderstorm Warning	FFC	Jefferson	35 min
Jun 12, 11:57 PM EDT	Severe Thunderstorm Warning	FFC	Baldwin	33 min
Jun 13, 12:13 AM EDT	Severe Thunderstorm Warning	FFC	Jefferson	47 min
Jun 13, 1:50 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Meriwether	25 min
Jun 13, 2:51 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Muscogee	24 min
Jun 13, 3:27 PM EDT	Severe Thunderstorm Warning	FFC	Carroll	33 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2004 Every severe thunderstorm warning in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.