Alert archive / Georgia / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 112, NWS Atlanta, GA

May 12, 2007Clayton County, DeKalb County, Henry County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at May 12, 2007, 5:44 PM EDT for Clayton County, DeKalb County, Henry County, Georgia. It was in force for 46 min. 1 report 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: May 12, 2007, 5:44 PM EDT (21:44 UTC)
Expired: May 12, 2007, 6:30 PM EDT
In force: 46 min
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

Counties Clayton County, GA, DeKalb County, GA, Henry County, GA

The radar

The Atlanta radar (KFFC), 43 km from the middle of the area, began a volume at 21:47 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	Remark
May 12, 6:00 PM EDT	TSTM WND DMG	6 Se Panthersville, GA	SEVERAL TREES AND POWER LINES DOWN NEAR THE RIVER ROAD/FLAT SHOALS ROAD INTERSECTION.

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

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 9.7 hours before the alert went out and 245 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 122144
SVRFFC
GAC063-089-151-122230-
/O.NEW.KFFC.SV.W.0112.070512T2144Z-070512T2230Z/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN CLAYTON COUNTY IN NORTH CENTRAL GEORGIA
  SOUTHERN DEKALB COUNTY IN NORTH CENTRAL GEORGIA
  NORTHERN HENRY COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 630 PM EDT

* AT 543 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZED HAIL.
  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM CONLEY 
  TO PANOLA MOUNTAIN STATE PARK  THESE STORMS WERE DRIFTING SOUTH AT
  5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  FOREST PARK...LAKE CITY...FLIPPEN...STOCKBRIDGE...MORROW...
  MCDONOUGH...JONESBORO AND IRONDALE.

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 3348 8438 3364 8438 3366 8433 3376 8433
      3369 8409 3363 8412 3365 8417 3362 8418
      3356 8413 3354 8405 3351 8405 3348 8399
      3339 8399

$$

2 follow-up statements

000 
WWUS52 KFFC 122202
SVSFFC

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

GAC089-122209-
/O.CAN.KFFC.SV.W.0112.000000T0000Z-070512T2230Z/
DEKALB GA-
559 PM EDT SAT MAY 12 2007

...THE SEVERE THUNDERSTORM WARNING FOR DEKALB COUNTY IS CANCELLED...

THE THUNDERSTORM THAT PROMPTED THE WARNING FOR DEKALB COUNTY HAS 
MOVED SOUTH INTO CLAYTON COUNTY.  RAIN AND THUNDERSTORMS WILL 
CONTINUE ACROSS SOUTHERN DEKALB COUNTY...BUT ARE NO LONGER DETECTED 
TO BE SEVERE.

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 3348 8438 3364 8438 3366 8433 3365 8417
      3362 8418 3356 8413 3354 8405 3351 8405
      3348 8399 3339 8399

$$

GAC063-151-122230-
/O.CON.KFFC.SV.W.0112.000000T0000Z-070512T2230Z/
HENRY GA-CLAYTON GA-
559 PM EDT SAT MAY 12 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR NORTHEASTERN CLAYTON AND NORTHERN HENRY COUNTIES...

AT 555 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE SEVERE THUNDERSTORMS FROM CONLEY TO PANOLA MOUNTAIN STATE 
PARK. THESE STORMS WERE DRIFTING SOUTH AT 5 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LAKE
CITY...FOREST PARK AND CONLEY.

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 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 3348 8438 3364 8438 3366 8433 3365 8417
      3362 8418 3356 8413 3354 8405 3351 8405
      3348 8399 3339 8399

$$


19

000 
WWUS52 KFFC 122234
SVSFFC

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

GAC063-151-122241-
/O.EXP.KFFC.SV.W.0112.000000T0000Z-070512T2230Z/
HENRY GA-CLAYTON GA-
631 PM EDT SAT MAY 12 2007

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CLAYTON AND
NORTHERN HENRY COUNTIES EXPIRED AT 630 PM EDT...

AT 629 PM EDT...SHOWERS AND THUNDERSTORMS CONTINUED ACROSS MUCH OF 
CLAYTON AND HENRY COUNTIES. HOWEVER...THESE STORMS HAVE DROPPED 
BELOW SEVERE LIMITS. PEA-SIZED HAIL...WIND GUSTS TO 35 
MPH...FREQUENT CLOUD-TO-GROUND LIGHTNING...AND HEAVY RAIN. THE
STORMS SHOWED A VERY SLOW DRIFT TO THE SOUTH.

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 3348 8438 3364 8438 3366 8433 3365 8417
      3362 8418 3356 8413 3354 8405 3351 8405
      3348 8399 3339 8399

$$


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, 5:02 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb	43 min
May 12, 5:03 PM EDT	Severe Thunderstorm Warning	FFC	Macon	32 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.