Alert archive / Georgia / Special Weather Statements in 2012

Special Weather Statement, NWS Atlanta, GA

August 4, 2012Putnam County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 4, 2012, 12:34 AM EDT for Putnam County, Georgia. It was in force for 26 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 4, 2012, 12:34 AM EDT (04:34 UTC)
Expired
Aug 4, 2012, 1:00 AM EDT
In force
26 min
Issued by
NWS Atlanta, GA

County Putnam County, GA

The radar

The Robins AFB radar (KJGX), 60 km from the middle of the area, began a volume at 04:36 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 00:00Z, 4.6 hours before the alert went out and 117 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 00:00Z on 2012-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1273 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 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 00:00Z on 2012-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 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
1273 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
1107 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
6 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.

769 
WWUS82 KFFC 040434
SPSFFC

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1234 AM EDT SAT AUG 4 2012

GAZ060-061-040500-
1234 AM EDT SAT AUG 4 2012

...SIGNIFICANT WEATHER ADVISORY FOR HEAVY RAIN IN PUTNAM AND HANCOCK
COUNTIES UNTIL 100 AM EDT...

AT 1231 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER FLAT ROCK...MOVING SOUTHEAST AT 10 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE PEA SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 35 MPH AS IT MOVES ACROSS
PUTNAM AND HANCOCK COUNTIES THROUGH 100 AM EDT. SOME LOCATIONS IN THE
PATH OF THIS STORM INCLUDE WARFIELD...ROCKVILLE...FLAT ROCK...OCONEE
SPRINGS PARK AND PLANT HARLEE BRANCH. HEAVY DOWNPOURS WILL CAUSE
PONDING OF WATER ON ROADWAYS.

&&

LAT...LON 3315 8312 3319 8325 3319 8329 3317 8332
      3317 8337 3329 8345 3339 8326 3317 8308
TIME...MOT...LOC 0435Z 329DEG 7KT 3326 8330

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 8:17 PM EDTSpecial Weather StatementFFCGreene43 min
Aug 3, 8:32 PM EDTSpecial Weather StatementFFCHenry28 min
Aug 3, 8:46 PM EDTSpecial Weather StatementFFCHall44 min
Aug 3, 8:55 PM EDTSpecial Weather StatementFFCPike50 min
Aug 3, 9:10 PM EDTSpecial Weather StatementFFCJohnson50 min
Aug 3, 9:31 PM EDTSpecial Weather StatementFFCSpalding44 min
Aug 3, 9:49 PM EDTSpecial Weather StatementFFCHall41 min
Aug 3, 10:05 PM EDTSpecial Weather StatementFFCJefferson40 min
Aug 4, 1:00 AM EDTSpecial Weather StatementFFCHancock, Putnam30 min
Aug 4, 2:43 PM EDTSpecial Weather StatementFFCFloyd62 min
Aug 4, 3:11 PM EDTSpecial Weather StatementFFCPolk49 min
Aug 4, 3:57 PM EDTSpecial Weather StatementFFCPolk33 min
Aug 4, 5:02 PM EDTSpecial Weather StatementFFCHaralson, Polk43 min
Aug 4, 7:18 PM EDTSpecial Weather StatementFFCBarrow, Jackson27 min
Aug 4, 7:27 PM EDTSpecial Weather StatementFFCDouglas33 min

Nearby

Special Weather Statements in Georgia, 2012Every special weather statement in 2012

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.