Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 440, NWS Atlanta, GA

July 12, 2011Coweta County, Fayette County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 12, 2011, 3:21 PM EDT for Coweta County, Fayette County, Georgia. It was in force for 39 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
Jul 12, 2011, 3:21 PM EDT (19:21 UTC)
Expired
Jul 12, 2011, 4:00 PM EDT
In force
39 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

Counties Coweta County, GA, Fayette County, GA

The radar

The Atlanta radar (KFFC), 7 km from the middle of the area, began a volume at 19:22 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
Jul 12, 3:22 PM EDTTSTM WND DMGFayetteville, GAFAYETTE COUNTY 911 RELAYED REPORTS OF 2 DOWNED TREES AND 4-5 DOWNED POWERLINES IN AND AROUND THE SQUARE IN FAYETTEVILLE.

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, 7.4 hours before the alert went out and 1 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 2011-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2178 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°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 2011-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 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
2178 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
1004 m above ground
0-6 km bulk shear
1 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
2 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.

344 
WUUS52 KFFC 121921
SVRFFC
GAC077-113-122000-
/O.NEW.KFFC.SV.W.0440.110712T1921Z-110712T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
321 PM EDT TUE JUL 12 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 400 PM EDT

* AT 318 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED HAIL...AND
  DAMAGING WINDS UP TO 60 MPH.  THIS STORM WAS LOCATED NEAR
  FAYETTEVILLE...MOVING SOUTH AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PEACHTREE CITY...WOOLSEY...BROOKS...HARALSON...SENOIA...TURIN AND
  SHARPSBURG.

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...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 3352 8453 3349 8440 3345 8438 3342 8440
      3341 8439 3336 8440 3332 8438 3326 8443
      3325 8451 3322 8451 3322 8465 3323 8466
      3345 8467
TIME...MOT...LOC 1921Z 015DEG 4KT 3341 8445

$$
1 follow-up statement
372 
WWUS52 KFFC 121941
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
341 PM EDT TUE JUL 12 2011

GAC077-113-122000-
/O.CON.KFFC.SV.W.0440.000000T0000Z-110712T2000Z/
COWETA GA-FAYETTE GA-
341 PM EDT TUE JUL 12 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR SOUTHERN FAYETTE AND EASTERN COWETA COUNTIES...

AT 338 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED
HAIL...AND DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
PEACHTREE CITY...MOVING SOUTHWEST AT 15 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO STARRS
MILL...HARALSON...SENOIA...TURIN AND SHARPSBURG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3347 8456 3342 8440 3341 8439 3336 8440
      3325 8451 3322 8451 3322 8465 3323 8466
      3345 8467
TIME...MOT...LOC 1942Z 039DEG 12KT 3337 8454

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 9:18 PM EDTSpecial Weather StatementFFCGordon27 min
Jul 11, 9:22 PM EDTSevere Thunderstorm WarningFFCGordon23 min
Jul 11, 9:48 PM EDTSpecial Weather StatementFFCFloyd27 min
Jul 11, 9:57 PM EDTSpecial Weather StatementFFCGordon33 min
Jul 11, 9:59 PM EDTSpecial Weather StatementFFCGordon31 min
Jul 11, 10:33 PM EDTSpecial Weather StatementFFCGordon57 min
Jul 12, 8:56 AM EDTSpecial Weather StatementFFCBartow34 min
Jul 12, 11:54 AM EDTSpecial Weather StatementFFCHaralson36 min
Jul 12, 1:42 PM EDTSpecial Weather StatementFFCDouglas33 min
Jul 12, 1:50 PM EDTSpecial Weather StatementFFCRockdale40 min
Jul 12, 1:55 PM EDTSevere Thunderstorm WarningFFCDade, Walker35 min
Jul 12, 2:11 PM EDTSpecial Weather StatementFFCRockdale34 min
Jul 12, 2:30 PM EDTSpecial Weather StatementFFCClayton30 min
Jul 12, 2:44 PM EDTSpecial Weather StatementFFCChattooga31 min
Jul 12, 2:52 PM EDTSevere Thunderstorm WarningFFCClayton, Henry23 min
Jul 12, 3:04 PM EDTSpecial Weather StatementFFCGwinnett26 min
Jul 12, 3:08 PM EDTHeat AdvisoryFFCBaldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 75 more37 hr
Jul 12, 3:13 PM EDTSpecial Weather StatementFFCDeKalb32 min
Jul 12, 3:16 PM EDTSpecial Weather StatementFFCFayette29 min
Jul 12, 3:32 PM EDTSevere Thunderstorm WarningFFCFulton30 min
Jul 12, 3:41 PM EDTSpecial Weather StatementFFCGwinnett49 min
Jul 12, 4:09 PM EDTSpecial Weather StatementFFCCoweta36 min
Jul 12, 4:23 PM EDTSpecial Weather StatementFFCMeriwether37 min
Jul 12, 4:35 PM EDTSpecial Weather StatementFFCMeriwether25 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2011Every severe thunderstorm warning in 2011

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.