Alert archive / Georgia / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 252, NWS Atlanta, GA

August 12, 2013Coweta County, Fayette County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 12, 2013, 7:29 PM EDT for Coweta County, Fayette 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
Aug 12, 2013, 7:29 PM EDT (23:29 UTC)
Expired
Aug 12, 2013, 8:15 PM EDT
In force
46 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

Counties Coweta County, GA, Fayette County, GA

The radar

The Atlanta radar (KFFC), 12 km from the middle of the area, began a volume at 23:31 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

TimeReportWhereRemark
Aug 12, 7:45 PM EDTTSTM WND DMGSharpsburg, GATREES DOWN NEAR THOMAS CROSSROADS. POWER ALSO REPORTED OUT.

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

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.5 hours before the alert went out and 16 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 12:00Z on 2013-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1856 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 12:00Z on 2013-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -41 square meters per square second.1939Sfc1 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
1856 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
696 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-41 m²/s²
0-3 km storm-relative helicity
-21 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.

637 
WUUS52 KFFC 122329
SVRFFC
GAC077-113-130015-
/O.NEW.KFFC.SV.W.0252.130812T2329Z-130813T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
729 PM EDT MON AUG 12 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FAYETTE COUNTY IN NORTH CENTRAL GEORGIA
  NORTHERN COWETA COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 815 PM EDT

* AT 726 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS UP TO 60
  MPH.  THIS STORM WAS LOCATED NEAR NEWNAN...MOVING EAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  SHARPSBURG...TURIN...PEACHTREE CITY...TYRONE...FAYETTEVILLE AND
  WOOLSEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

IF YOU SEE WIND DAMAGE...HAIL OR 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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

&&

LAT...LON 3346 8489 3351 8468 3350 8461 3352 8459
      3354 8450 3354 8444 3353 8443 3336 8440
      3332 8451 3330 8488 3338 8492
TIME...MOT...LOC 2329Z 251DEG 22KT 3341 8472

$$
3 follow-up statements
927 
WWUS52 KFFC 122343
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
743 PM EDT MON AUG 12 2013

GAC077-113-130015-
/O.CON.KFFC.SV.W.0252.000000T0000Z-130813T0015Z/
COWETA GA-FAYETTE GA-
743 PM EDT MON AUG 12 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR FAYETTE AND NORTHEASTERN COWETA COUNTIES...

AT 740 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS UP
TO 60 MPH. THIS STORM WAS LOCATED NEAR THOMAS CROSSROADS...MOVING
EAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
TYRONE...PEACHTREE CITY...SANDY CREEK...STARRS MILL...FAYETTEVILLE...
WOOLSEY...INMAN AND KENWOOD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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...HAIL OR 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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

&&

LAT...LON 3333 8474 3349 8476 3351 8468 3350 8461
      3352 8459 3354 8450 3354 8444 3353 8443
      3336 8440 3332 8451
TIME...MOT...LOC 2343Z 260DEG 21KT 3343 8462

$$
539 
WWUS52 KFFC 122357
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
757 PM EDT MON AUG 12 2013

GAC077-113-130015-
/O.CON.KFFC.SV.W.0252.000000T0000Z-130813T0015Z/
COWETA GA-FAYETTE GA-
757 PM EDT MON AUG 12 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR FAYETTE AND NORTHEASTERN COWETA COUNTIES...

AT 754 PM EDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM CAPABLE OF
PRODUCING QUARTER SIZED HAIL...AND DAMAGING WINDS UP TO 60 MPH. THIS
STORM WAS LOCATED NEAR PEACHTREE CITY...MOVING EAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
FAYETTEVILLE...WOOLSEY...INMAN AND KENWOOD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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...HAIL OR 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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

&&

LAT...LON 3333 8470 3350 8473 3351 8468 3350 8461
      3352 8459 3354 8450 3354 8444 3353 8443
      3336 8440 3332 8451
TIME...MOT...LOC 2357Z 260DEG 21KT 3344 8452

$$
461 
WWUS52 KFFC 130010
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
810 PM EDT MON AUG 12 2013

GAC077-113-130020-
/O.EXP.KFFC.SV.W.0252.000000T0000Z-130813T0015Z/
COWETA GA-FAYETTE GA-
810 PM EDT MON AUG 12 2013

...THE SEVERE THUNDERSTORM WARNING FOR FAYETTE AND NORTHEASTERN
COWETA COUNTIES EXPIRES AT 815 PM EDT...

AT 808 PM EDT...A STRONG THUNDERSTORM WAS REPORTED. THIS STORM WAS
LOCATED NEAR FAYETTEVILLE...MOVING EAST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY.

IF YOU SEE WIND DAMAGE...HAIL OR 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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

LAT...LON 3333 8470 3350 8473 3351 8468 3350 8461
      3352 8459 3354 8450 3354 8444 3353 8443
      3336 8440 3332 8451
TIME...MOT...LOC 0010Z 260DEG 21KT 3345 8443

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 11, 8:02 PM EDTSpecial Weather StatementFFCCherokee43 min
Aug 11, 9:54 PM EDTSpecial Weather StatementFFCClarke, Jackson36 min
Aug 12, 1:43 PM EDTSpecial Weather StatementFFCWhitfield32 min
Aug 12, 1:49 PM EDTSpecial Weather StatementFFCDeKalb, Fulton26 min
Aug 12, 2:23 PM EDTSpecial Weather StatementFFCGordon37 min
Aug 12, 2:56 PM EDTSpecial Weather StatementFFCGordon64 min
Aug 12, 3:24 PM EDTSpecial Weather StatementFFCCherokee36 min
Aug 12, 3:28 PM EDTSpecial Weather StatementFFCGreene32 min
Aug 12, 3:55 PM EDTSpecial Weather StatementFFCCherokee35 min
Aug 12, 4:16 PM EDTSpecial Weather StatementFFCWhite29 min
Aug 12, 4:39 PM EDTSpecial Weather StatementFFCWhite66 min
Aug 12, 4:50 PM EDTFlash Flood WarningFFCLumpkin, White6 hr
Aug 12, 5:02 PM EDTSpecial Weather StatementFFCMorgan28 min
Aug 12, 5:32 PM EDTSpecial Weather StatementFFCGreene, Morgan43 min
Aug 12, 5:34 PM EDTSpecial Weather StatementFFCDouglas26 min
Aug 12, 5:40 PM EDTSpecial Weather StatementFFCPaulding65 min
Aug 12, 6:17 PM EDTSpecial Weather StatementFFCFulton43 min
Aug 12, 6:27 PM EDTSpecial Weather StatementFFCCarroll33 min
Aug 12, 6:56 PM EDTSpecial Weather StatementFFCHeard34 min
Aug 12, 7:13 PM EDTSpecial Weather StatementFFCCoweta32 min
Aug 12, 7:44 PM EDTSpecial Weather StatementFFCJones31 min
Aug 12, 7:46 PM EDTSpecial Weather StatementFFCHenry29 min
Aug 12, 7:49 PM EDTSpecial Weather StatementFFCSpalding26 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2013Every severe thunderstorm warning in 2013

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.