Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 446, NWS Atlanta, GA

July 13, 2011Butts County, Henry County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 13, 2011, 6:29 PM EDT for Butts County, Henry County, Georgia. It was in force for 46 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
Jul 13, 2011, 6:29 PM EDT (22:29 UTC)
Expired
Jul 13, 2011, 7:15 PM EDT
In force
46 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

Counties Butts County, GA, Henry County, GA

The radar

The Atlanta radar (KFFC), 58 km from the middle of the area, began a volume at 22:29 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.5 hours before the alert went out and 52 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 2011-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2823 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 2011-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -28 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
2823 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
810 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
-28 m²/s²
0-3 km storm-relative helicity
81 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.

029 
WUUS52 KFFC 132229
SVRFFC
GAC035-151-132315-
/O.NEW.KFFC.SV.W.0446.110713T2229Z-110713T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
629 PM EDT WED JUL 13 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN BUTTS COUNTY IN CENTRAL GEORGIA
  SOUTHEASTERN HENRY COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 715 PM EDT

* AT 625 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   
  FINCHERVILLE AND SHOWED A SLIGHT SOUTHWARD DRIFT.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  STARK...WORTHVILLE AND OLA.

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 3337 8411 3349 8398 3348 8396 3346 8393
      3342 8391 3341 8389 3337 8386 3333 8385
      3325 8386
TIME...MOT...LOC 2229Z 020DEG 2KT 3343 8394

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 2:14 PM EDTSpecial Weather StatementFFCCatoosa46 min
Jul 13, 2:32 PM EDTSpecial Weather StatementFFCPickens28 min
Jul 13, 2:36 PM EDTSpecial Weather StatementFFCClarke, Oconee24 min
Jul 13, 2:49 PM EDTSpecial Weather StatementFFCSumter26 min
Jul 13, 2:55 PM EDTSpecial Weather StatementFFCMuscogee35 min
Jul 13, 2:56 PM EDTSpecial Weather StatementFFCCatoosa, Murray, Whitfield49 min
Jul 13, 3:01 PM EDTSpecial Weather StatementFFCDawson29 min
Jul 13, 3:05 PM EDTSpecial Weather StatementFFCClarke, Oconee25 min
Jul 13, 3:20 PM EDTSpecial Weather StatementFFCOglethorpe25 min
Jul 13, 3:23 PM EDTSpecial Weather StatementFFCForsyth37 min
Jul 13, 3:28 PM EDTSpecial Weather StatementFFCMuscogee32 min
Jul 13, 3:35 PM EDTSevere Thunderstorm WarningFFCMuscogee17 min
Jul 13, 3:44 PM EDTSpecial Weather StatementFFCSumter31 min
Jul 13, 3:45 PM EDTSpecial Weather StatementFFCOglethorpe30 min
Jul 13, 4:43 PM EDTSpecial Weather StatementFFCWilkes47 min
Jul 13, 4:47 PM EDTSpecial Weather StatementFFCFloyd43 min
Jul 13, 5:24 PM EDTSpecial Weather StatementFFCFayette36 min
Jul 13, 5:42 PM EDTSpecial Weather StatementFFCLamar48 min
Jul 13, 5:43 PM EDTSevere Thunderstorm WarningFFCMorgan, Putnam47 min
Jul 13, 6:03 PM EDTSpecial Weather StatementFFCClayton27 min
Jul 13, 6:09 PM EDTSpecial Weather StatementFFCTalbot51 min
Jul 13, 6:13 PM EDTSevere Thunderstorm WarningFFCTalbot, Taylor47 min
Jul 13, 6:22 PM EDTSpecial Weather StatementFFCNewton23 min
Jul 13, 6:26 PM EDTSevere Thunderstorm WarningFFCNewton36 min
Jul 13, 6:32 PM EDTSpecial Weather StatementFFCHancock43 min
Jul 13, 6:46 PM EDTSpecial Weather StatementFFCCrisp29 min
Jul 13, 6:52 PM EDTSpecial Weather StatementFFCLaurens23 min
Jul 13, 7:17 PM EDTSpecial Weather StatementFFCMeriwether43 min
Jul 13, 7:19 PM EDTSpecial Weather StatementFFCDodge26 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.