Alert archive / Georgia / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 15, NWS Atlanta, GA

March 31, 2002Gwinnett County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Mar 31, 2002, 2:21 PM EST for Gwinnett County, Georgia. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 31, 2002, 2:21 PM EST (19:21 UTC)
Expired: Mar 31, 2002, 2:45 PM EST
In force: 24 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), 79 km from the middle of the area, began a volume at 19:21 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.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.4 hours before the alert went out and 75 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 856 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 226 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

606 
WUUS52 KFFC 311921
SVRATL
GAC135-311945-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
220 PM EST SUN MAR 31 2002

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 245 PM EST

* AT 216 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM CAPABLE OF PRODUCING WINDS UP TO 55 MPH AND HAIL 
TO THE SIZE OF QUARTERS LOCATED 7 MILES SOUTHWEST OF MOUNTAIN 
PARK...MOVING NORTHEAST AT 45 MPH.

* LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...BUFORD...
DACULA...GRAYSON...LAWRENCEVILLE...LILBURN...MOUNTAIN PARK AND
SNELLVILLE.

LARGE HAIL...DAMAGING WINDS AND TORRENTIAL RAIN ARE EXPECTED WITH
THESE STORMS. TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORMS
PASS.

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 3391 8419 3380 8410 3394 8384 3414 8399

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 8:40 PM EST	Severe Thunderstorm Warning	FFC	Clayton, Fulton	35 min
Mar 30, 9:01 PM EST	Severe Thunderstorm Warning	FFC	DeKalb, Henry, Rockdale	29 min
Mar 31, 1:58 PM EST	Severe Thunderstorm Warning	FFC	Cobb, Fulton	32 min
Mar 31, 2:09 PM EST	Severe Thunderstorm Warning	FFC	DeKalb	36 min
Mar 31, 2:35 PM EST	Severe Thunderstorm Warning	FFC	Sumter	40 min
Mar 31, 3:05 PM EST	Severe Thunderstorm Warning	FFC	Dodge	25 min
Mar 31, 3:42 PM EST	Severe Thunderstorm Warning	FFC	Laurens	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.