Alert archive / Georgia / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 255, NWS Atlanta, GA

December 9, 2004DeKalb County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Dec 9, 2004, 9:15 PM EST for DeKalb County, Georgia. It was in force for 45 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
Dec 9, 2004, 9:15 PM EST (02:15 UTC)
Expired
Dec 9, 2004, 10:00 PM EST
In force
45 min
Issued by
NWS Atlanta, GA
Area
Counties, with a storm outline in the text

County DeKalb County, GA

The radar

The Atlanta radar (KFFC), 52 km from the middle of the area, began a volume at 02:14 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.

IssuedProductOfficeLasted
Dec 9, 9:05 PM ESTTornado WatchSPC6 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 2.3 hours before the alert went out and 48 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 00:00Z on 2004-12-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 976 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 00:00Z on 2004-12-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 246 square meters per square second.1939587897117Sfc1 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
976 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
568 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
246 m²/s²
0-3 km storm-relative helicity
243 m²/s²
Significant tornado parameter
1.5
Supercell composite
5.9

Open this sounding in Storm Lab

The text

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

000 
WUUS52 KFFC 100215
SVRFFC
GAC089-100300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
915 PM EST THU DEC 9 2004

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 1000 PM EST

* AT 909 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 12
  MILES SOUTHWEST OF PANTHERSVILLE...AND MOVING NORTHEAST AT 40 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO STONE
  MOUNTAIN...REDAN...LITHONIA...DECATUR...CLARKSTON AND AVONDALE
  ESTATES.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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 3376 8434 3361 8435 3367 8413 3376 8407
      3385 8414

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 9, 9:01 PM ESTSevere Thunderstorm WarningFFCClayton, Fulton44 min
Dec 9, 9:14 PM ESTSevere Thunderstorm WarningFFCCoweta, Heard31 min
Dec 9, 9:27 PM ESTSevere Thunderstorm WarningFFCBanks, Jackson48 min
Dec 9, 9:38 PM ESTSevere Thunderstorm WarningFFCGwinnett, Rockdale22 min
Dec 9, 9:50 PM ESTSevere Thunderstorm WarningFFCCoweta, Fayette, Fulton25 min
Dec 9, 11:02 PM ESTSevere Thunderstorm WarningFFCGilmer, Pickens28 min
Dec 9, 11:37 PM ESTSevere Thunderstorm WarningFFCMacon, Schley38 min
Dec 10, 12:33 AM ESTSevere Thunderstorm WarningFFCHouston27 min
Dec 10, 12:41 AM ESTSevere Thunderstorm WarningFFCTwiggs49 min
Dec 10, 2:57 PM ESTSevere Thunderstorm WarningFFCFloyd33 min
Dec 10, 3:27 PM ESTSevere Thunderstorm WarningFFCBartow, Gordon, Pickens33 min
Dec 10, 3:29 PM ESTSevere Thunderstorm WarningFFCDouglas, Fulton31 min
Dec 10, 3:37 PM ESTSevere Thunderstorm WarningFFCCarroll8 min
Dec 10, 3:40 PM ESTSevere Thunderstorm WarningFFCCarroll20 min
Dec 10, 3:48 PM ESTSevere Thunderstorm WarningFFCCoweta, Heard27 min
Dec 10, 3:50 PM ESTSevere Thunderstorm WarningFFCHall25 min
Dec 10, 4:00 PM ESTSevere Thunderstorm WarningFFCDeKalb, Fulton30 min
Dec 10, 4:09 PM ESTSevere Thunderstorm WarningFFCMeriwether, Troup36 min
Dec 10, 4:44 PM ESTSevere Thunderstorm WarningFFCButts, Henry, Spalding31 min
Dec 10, 4:54 PM ESTSevere Thunderstorm WarningFFCHenry, Newton36 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2004Every 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.