Alert archive / Georgia / Special Weather Statements in 2012

Special Weather Statement, NWS Atlanta, GA

August 7, 2012Washington County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 7, 2012, 7:05 PM EDT for Washington County, Georgia. It was in force for 25 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 7, 2012, 7:05 PM EDT (23:05 UTC)
Expired: Aug 7, 2012, 7:30 PM EDT
In force: 25 min
Issued by: NWS Atlanta, GA

County Washington County, GA

The radar

The Robins AFB radar (KJGX), 62 km from the middle of the area, began a volume at 23:06 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, 11.1 hours before the alert went out and 164 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 717 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 568 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: -24 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.

290 
WWUS82 KFFC 072305
SPSFFC

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
705 PM EDT TUE AUG 7 2012

GAZ074-072330-
705 PM EDT TUE AUG 7 2012

...SIGNIFICANT WEATHER ADVISORY FOR PEA SIZED HAIL AND 40 MPH WINDS
IN WASHINGTON COUNTY UNTIL 730 PM EDT...

AT 702 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR TENNILLE...MOVING NORTHEAST AT 10 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE PEA SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH AS IT MOVES ACROSS
WASHINGTON COUNTY THROUGH 730 PM EDT. SOME LOCATIONS IN THE PATH OF
THIS STORM INCLUDE HEBRON...PRINGLE...TENNILLE...OCONEE...DEEPSTEP...
HARRISON...RIDDLEVILLE...SANDERSVILLE...DOWNS...HAMBURG STATE PARK...
WARTHEN AND DAVISBORO. HEAVY DOWNPOURS WILL CAUSE PONDING OF WATER ON
ROADWAYS.

THESE WIND GUSTS MAY PRODUCE MINOR DAMAGE TO TREE LIMBS AND BLOW
LIGHT...UNSECURED OBJECTS AROUND.

&&

LAT...LON 3282 8252 3277 8276 3281 8282 3276 8295
      3283 8297 3287 8304 3295 8308 3299 8305
      3303 8307 3308 8305 3312 8292 3320 8285
      3324 8275 3318 8274 3313 8266 3303 8260
      3302 8255 3295 8254 3292 8251
TIME...MOT...LOC 2306Z 210DEG 8KT 3295 8278

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 2:11 AM EDT	Special Weather Statement	FFC	Union	34 min
Aug 7, 2:21 PM EDT	Special Weather Statement	FFC	Cherokee	24 min
Aug 7, 3:36 PM EDT	Special Weather Statement	FFC	Cobb	39 min
Aug 7, 4:15 PM EDT	Special Weather Statement	FFC	Toombs	30 min
Aug 7, 4:32 PM EDT	Special Weather Statement	FFC	Montgomery, Telfair, Wheeler	28 min
Aug 7, 4:40 PM EDT	Special Weather Statement	FFC	Wilkes	35 min
Aug 7, 4:44 PM EDT	Special Weather Statement	FFC	Toombs	16 min
Aug 7, 4:52 PM EDT	Special Weather Statement	FFC	Union	38 min
Aug 7, 4:58 PM EDT	Special Weather Statement	FFC	Montgomery, Telfair, Toombs, Wheeler	32 min
Aug 7, 5:02 PM EDT	Severe Thunderstorm Warning	FFC	Montgomery, Wheeler	43 min
Aug 7, 5:09 PM EDT	Special Weather Statement	FFC	Wilkes	36 min
Aug 7, 5:20 PM EDT	Special Weather Statement	FFC	Emanuel	25 min
Aug 7, 5:49 PM EDT	Special Weather Statement	FFC	Laurens	26 min
Aug 7, 5:59 PM EDT	Special Weather Statement	FFC	Johnson	31 min
Aug 7, 6:22 PM EDT	Special Weather Statement	FFC	Johnson	23 min
Aug 7, 6:57 PM EDT	Special Weather Statement	FFC	Glascock	33 min
Aug 7, 7:17 PM EDT	Special Weather Statement	FFC	Hall	28 min
Aug 7, 7:34 PM EDT	Special Weather Statement	FFC	Glascock, Washington	86 min
Aug 7, 7:56 PM EDT	Special Weather Statement	FFC	Banks, Madison	49 min

Nearby

Special Weather Statements in Georgia, 2012 Every 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.