Alert archive / Georgia / Special Weather Statements in 2012

Special Weather Statement, NWS Atlanta, GA

August 7, 2012Cherokee County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 7, 2012, 2:21 PM EDT for Cherokee County, Georgia. It was in force for 24 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, 2:21 PM EDT (18:21 UTC)
Expired
Aug 7, 2012, 2:45 PM EDT
In force
24 min
Issued by
NWS Atlanta, GA

County Cherokee County, GA

The radar

The Atlanta radar (KFFC), 91 km from the middle of the area, began a volume at 18:22 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, 6.4 hours before the alert went out and 89 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 2012-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 717 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 12:00Z on 2012-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 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
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.

953 
WWUS82 KFFC 071821
SPSFFC

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

GAZ021-033-071845-
221 PM EDT TUE AUG 7 2012

...SIGNIFICANT WEATHER ADVISORY FOR PEA SIZED HAIL AND 40 MPH WINDS
IN CHEROKEE AND FULTON COUNTIES UNTIL 245 PM EDT...

AT 218 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
NEARLY STATIONARY STRONG THUNDERSTORM NEAR MILTON.

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
CHEROKEE AND FULTON COUNTIES THROUGH 245 PM EDT. SOME LOCATIONS IN
THE PATH OF THIS STORM INCLUDE MILTON...ALPHARETTA...BIRMINGHAM...
FREE HOME...BUFFINGTON...HOLBROOK...LATHEMTOWN...UNION HILL AND
HICKORY FLAT. 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 3411 8426 3410 8422 3409 8421 3406 8440
      3426 8448 3431 8426
TIME...MOT...LOC 1821Z 167DEG 2KT 3416 8431

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 2:11 AM EDTSpecial Weather StatementFFCUnion34 min
Aug 7, 3:36 PM EDTSpecial Weather StatementFFCCobb39 min
Aug 7, 4:15 PM EDTSpecial Weather StatementFFCToombs30 min
Aug 7, 4:32 PM EDTSpecial Weather StatementFFCMontgomery, Telfair, Wheeler28 min
Aug 7, 4:40 PM EDTSpecial Weather StatementFFCWilkes35 min
Aug 7, 4:44 PM EDTSpecial Weather StatementFFCToombs16 min
Aug 7, 4:52 PM EDTSpecial Weather StatementFFCUnion38 min
Aug 7, 4:58 PM EDTSpecial Weather StatementFFCMontgomery, Telfair, Toombs, Wheeler32 min
Aug 7, 5:02 PM EDTSevere Thunderstorm WarningFFCMontgomery, Wheeler43 min
Aug 7, 5:09 PM EDTSpecial Weather StatementFFCWilkes36 min
Aug 7, 5:20 PM EDTSpecial Weather StatementFFCEmanuel25 min
Aug 7, 5:49 PM EDTSpecial Weather StatementFFCLaurens26 min
Aug 7, 5:59 PM EDTSpecial Weather StatementFFCJohnson31 min
Aug 7, 6:22 PM EDTSpecial Weather StatementFFCJohnson23 min
Aug 7, 6:57 PM EDTSpecial Weather StatementFFCGlascock33 min
Aug 7, 7:05 PM EDTSpecial Weather StatementFFCWashington25 min
Aug 7, 7:17 PM EDTSpecial Weather StatementFFCHall28 min
Aug 7, 7:34 PM EDTSpecial Weather StatementFFCGlascock, Washington86 min
Aug 7, 7:56 PM EDTSpecial Weather StatementFFCBanks, Madison49 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.