Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 477, NWS Atlanta, GA

August 13, 2011Laurens County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 13, 2011, 4:38 PM EDT for Laurens County, Georgia. It was in force for 33 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
Aug 13, 2011, 4:38 PM EDT (20:38 UTC)
Expired
Aug 13, 2011, 5:11 PM EDT
In force
33 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

County Laurens County, GA

The radar

The Robins AFB radar (KJGX), 62 km from the middle of the area, began a volume at 20:39 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, 8.6 hours before the alert went out and 194 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 2011-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1086 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 2011-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 square meters per square second.193958Sfc1 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
1086 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
756 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
20 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.

784 
WUUS52 KFFC 132038
SVRFFC
GAC175-132130-
/O.NEW.KFFC.SV.W.0477.110813T2038Z-110813T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
438 PM EDT SAT AUG 13 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN LAURENS COUNTY IN CENTRAL GEORGIA

* UNTIL 530 PM EDT

* AT 433 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 RENTZ...
  MOVING EAST AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  ROCKLEDGE...MINTER AND LOWERY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3237 8305 3254 8298 3249 8265 3246 8265
      3246 8269 3241 8270 3239 8272 3234 8273
      3234 8275 3231 8272 3228 8276 3227 8276
TIME...MOT...LOC 2038Z 288DEG 6KT 3243 8291

$$
16
1 follow-up statement
487 
WWUS52 KFFC 132111
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
511 PM EDT SAT AUG 13 2011

GAC175-132121-
/O.CAN.KFFC.SV.W.0477.000000T0000Z-110813T2130Z/
LAURENS GA-
511 PM EDT SAT AUG 13 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LAURENS COUNTY IS 
CANCELLED...

THE THUNDERSTORM HAS WEAKENED AND IS NO LONGER EXPECTED TO PRODUCE
SEVERE WEATHER. HOWEVER...STRONG GUSTY WINDS UP TO 45 MPH...VERY
HEAVY RAIN...AND SMALL HAIL ARE STILL POSSIBLE WITH THIS STORM.

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 3237 8305 3254 8298 3249 8265 3246 8265
      3246 8269 3241 8270 3239 8272 3234 8273
      3234 8275 3231 8272 3228 8276 3227 8276
TIME...MOT...LOC 2111Z 288DEG 6KT 3241 8285

$$
16

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 8:00 PM EDTSpecial Weather StatementFFCGlascock30 min
Aug 12, 9:11 PM EDTSpecial Weather StatementFFCMorgan34 min
Aug 12, 9:53 PM EDTSpecial Weather StatementFFCMadison37 min
Aug 12, 10:34 PM EDTSpecial Weather StatementFFCOglethorpe26 min
Aug 12, 11:33 PM EDTSpecial Weather StatementFFCOglethorpe42 min
Aug 13, 1:18 PM EDTSpecial Weather StatementFFCWarren42 min
Aug 13, 2:59 PM EDTSpecial Weather StatementFFCHouston31 min
Aug 13, 4:06 PM EDTSpecial Weather StatementFFCTwiggs24 min
Aug 13, 4:19 PM EDTSpecial Weather StatementFFCTroup26 min
Aug 13, 4:30 PM EDTSpecial Weather StatementFFCBleckley30 min
Aug 13, 4:59 PM EDTSpecial Weather StatementFFCWilkinson31 min
Aug 13, 5:44 PM EDTSpecial Weather StatementFFCJohnson31 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.