Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 441, NWS Atlanta, GA

July 12, 2011Fulton County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 12, 2011, 3:32 PM EDT for Fulton County, Georgia. It was in force for 30 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, 3:32 PM EDT (19:32 UTC)
Expired
Jul 12, 2011, 4:02 PM EDT
In force
30 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

County Fulton County, GA

The radar

The Atlanta radar (KFFC), 41 km from the middle of the area, began a volume at 19:35 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, 3:40 PM EDTHAIL 14 Nnw Atlanta, GAPUBLIC REPORTS QUARTER SIZED HAIL AND INTENSE LIGHTNING NEAR HOWELL MILL ROAD AND INTERSTATE 75.

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, 7.5 hours before the alert went out and 39 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.

743 
WUUS52 KFFC 121932
SVRFFC
GAC121-122015-
/O.NEW.KFFC.SV.W.0441.110712T1932Z-110712T2015Z/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 415 PM EDT

* AT 331 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
  MIDTOWN...MOVING SOUTH AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  ATLANTA...GRANT PARK-ZOO ATLANTA...HAPEVILLE...EAST POINT AND
  COLLEGE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

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 3385 8443 3384 8435 3365 8435 3364 8445
      3365 8446 3363 8446 3364 8463
TIME...MOT...LOC 1933Z 020DEG 6KT 3377 8441

$$
1 follow-up statement
373 
WWUS52 KFFC 122002
SVSFFC

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

GAC121-122011-
/O.CAN.KFFC.SV.W.0441.000000T0000Z-110712T2015Z/
FULTON GA-
402 PM EDT TUE JUL 12 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL FULTON COUNTY IS
CANCELLED...

THE THUNDERSTORM HAS WEAKENED AND IS NO LONGER EXPECTED TO PRODUCE 
SEVERE WEATHER. HOWEVER...STRONG GUSTY WINDS UP TO 40 MPH... HEAVY 
RAIN...AND PEA SIZED HAIL ARE STILL POSSIBLE WITH THIS STORM.

AT 402 PM EDT...RADAR INDICATED THE WEAKENED STORM WAS NORTH OF 
BOLTON IN CENTRAL FULTON COUNTY AND DRIFTING NORTHWEST AT 5 MPH. 

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 3385 8443 3384 8435 3365 8435 3364 8445
      3365 8446 3363 8446 3364 8463
TIME...MOT...LOC 2001Z 152DEG 4KT 3384 8442

$$

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, 3:21 PM EDTSevere Thunderstorm WarningFFCCoweta, Fayette39 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.