Alert archive / Georgia / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 110, NWS Atlanta, GA

May 12, 2007DeKalb County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at May 12, 2007, 5:02 PM EDT for DeKalb County, Georgia. It was in force for 43 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: May 12, 2007, 5:02 PM EDT (21:02 UTC)
Expired: May 12, 2007, 5:45 PM EDT
In force: 43 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), 53 km from the middle of the area, began a volume at 21:05 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

Birmingham, AL (KBMX), launched 12:00Z, 9.0 hours before the alert went out and 247 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: 495 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 1179 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: -17 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 122102
SVRFFC
GAC089-122145-
/O.NEW.KFFC.SV.W.0110.070512T2102Z-070512T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
502 PM EDT SAT MAY 12 2007

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 545 PM EDT

* AT 500 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING NICKEL SIZED
  HAIL.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM PINE
  LAKE TO LITHONIA...MOVING SOUTHWEST AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  AVONDALE ESTATES...DRUID HILLS...REDAN...DECATUR...BELVEDERE
  PARK...PANTHERSVILLE...GRESHAM PARK AND CANDLER-MCAFEE.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL 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 3363 8412 3365 8414 3364 8424 3366 8426
      3366 8433 3379 8433 3388 8429 3387 8422
      3384 8414 3375 8404

$$

1 follow-up statement

000 
WWUS52 KFFC 122120
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
518 PM EDT SAT MAY 12 2007

GAC089-122145-
/O.CON.KFFC.SV.W.0110.000000T0000Z-070512T2145Z/
DEKALB GA-
518 PM EDT SAT MAY 12 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR DEKALB COUNTY...

AT 513 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A LINE OF STRONG TO SEVERE THUNDERSTORMS ACROSS SOUTHERN 
DEKALB COUNTY FROM CANDLER...MCAFEE TO REDAN...TO LITHONIA...MOVING 
SOUTHWEST AT 5 MPH.

PENNY-SIZED HAIL AND DAMAGING WINDS ARE STILL POSSIBLE WITH THIS 
ACTIVITY.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SCOTTDALE...NORTH DECATUR...AVONDALE ESTATES...PANTHERSVILLE...
GRESHAM PARK...DRUID HILLS...DECATUR...CANDLER-MCAFEE AND BELVEDERE
PARK.

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 3363 8412 3365 8414 3364 8424 3366 8426
      3366 8433 3379 8433 3388 8429 3387 8422
      3384 8414 3375 8404

$$


19

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 2:00 PM EDT	Severe Thunderstorm Warning	FFC	Lumpkin	30 min
May 12, 2:29 PM EDT	Severe Thunderstorm Warning	FFC	White	46 min
May 12, 2:42 PM EDT	Severe Thunderstorm Warning	FFC	Gilmer	23 min
May 12, 2:52 PM EDT	Severe Thunderstorm Warning	FFC	Dawson, Lumpkin	38 min
May 12, 3:15 PM EDT	Severe Thunderstorm Warning	FFC	Harris	30 min
May 12, 4:32 PM EDT	Severe Thunderstorm Warning	FFC	Spalding	28 min
May 12, 4:50 PM EDT	Severe Thunderstorm Warning	FFC	Oconee	25 min
May 12, 4:58 PM EDT	Severe Thunderstorm Warning	FFC	Taylor	23 min
May 12, 5:03 PM EDT	Severe Thunderstorm Warning	FFC	Macon	32 min
May 12, 5:44 PM EDT	Severe Thunderstorm Warning	FFC	Clayton, DeKalb, Henry	46 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2007 Every severe thunderstorm warning in 2007

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.