Alert archive / Georgia / Special Weather Statements in 2012

Special Weather Statement, NWS Atlanta, GA

August 4, 2012Douglas County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 4, 2012, 8:06 PM EDT for Douglas County, Georgia. It was in force for 39 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, 8:06 PM EDT (00:06 UTC)
Expired
Aug 4, 2012, 8:45 PM EDT
In force
39 min
Issued by
NWS Atlanta, GA

County Douglas County, GA

The radar

The Atlanta radar (KFFC), 50 km from the middle of the area, began a volume at 00:07 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, 0.1 hours before the alert went out and 54 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 2012-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1524 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 00:00Z on 2012-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 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
1524 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
1053 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-2 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.

449 
WWUS82 KFFC 050006
SPSFFC

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
806 PM EDT SAT AUG 4 2012

GAZ031-042-043-050045-
806 PM EDT SAT AUG 4 2012

...SIGNIFICANT WEATHER ADVISORY FOR 40 MPH WINDS AND HEAVY RAIN IN 
PAULDING...CARROLL AND DOUGLAS COUNTIES UNTIL 845 PM EDT...

AT 803 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER WINSTON...MOVING NORTHWEST AT 5 MPH.

RAINFALL AMOUNTS AROUND AN  INCH CAN BE EXPECTED ON TOP OF PREVIOUS 
RAINFALL ACROSS PAULDING...CARROLL AND DOUGLAS COUNTIES...INCLUDING 
AREAS AROUND BILL ARP...FAIRPLAY...DOUGLASVILLE...CHAPEL 
HILL...BROWNSVILLE...WINSTON...LAKE VAL-DO-MAR...VILLA RICA AND NEW 
GEORGIA. DRIVERS SHOULD USE CAUTION AS INTENSE RAINFALL WILL REDUCE 
VISIBILITIES. PONDING OF WATER ON ROADWAYS IS ALSO LIKELY.

&&

LAT...LON 3372 8503 3390 8489 3373 8465 3359 8481
TIME...MOT...LOC 0005Z 123DEG 3KT 3371 8482

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 8:07 PM EDTSpecial Weather StatementFFCTroup38 min
Aug 5, 2:43 PM EDTSpecial Weather StatementFFCLaurens32 min
Aug 5, 6:57 PM EDTSpecial Weather StatementFFCCatoosa, Whitfield48 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.