Alert archive / Georgia / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 198, NWS Atlanta, GA

August 20, 2004Lumpkin County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 20, 2004, 8:38 PM EDT for Lumpkin County, Georgia. It was in force for 37 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: Aug 20, 2004, 8:38 PM EDT (00:38 UTC)
Expired: Aug 20, 2004, 9:15 PM EDT
In force: 37 min
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

County Lumpkin County, GA

The radar

The Atlanta radar (KFFC), 150 km from the middle of the area, began a volume at 00:39 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 20, 4:55 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 0.6 hours before the alert went out and 147 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: 456 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 1079 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 137 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 
WUUS52 KFFC 210038
SVRATL
GAC187-210115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
838 PM EDT FRI AUG 20 2004

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 915 PM EDT

* AT 836 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 7 MILES WEST OF PORTER SPRINGS TO
  GARLAND...MOVING NORTHEAST AT 20 MPH.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...GARLAND.

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 3472 8393 3463 8410 3446 8391 3449 8383

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 20, 8:29 PM EDT	Severe Thunderstorm Warning	FFC	Hall	31 min
Aug 20, 8:41 PM EDT	Severe Thunderstorm Warning	FFC	White	34 min
Aug 20, 8:44 PM EDT	Severe Thunderstorm Warning	FFC	Union	31 min
Aug 20, 8:46 PM EDT	Severe Thunderstorm Warning	FFC	Dooly, Pulaski	29 min
Aug 20, 8:54 PM EDT	Severe Thunderstorm Warning	FFC	Towns	36 min
Aug 20, 9:13 PM EDT	Severe Thunderstorm Warning	FFC	Morgan	32 min
Aug 20, 9:24 PM EDT	Severe Thunderstorm Warning	FFC	Bleckley, Laurens, Twiggs, Wilkinson	36 min
Aug 20, 9:28 PM EDT	Severe Thunderstorm Warning	FFC	Clarke, Oconee	32 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.