Alert archive / Georgia / Special Weather Statements in 2011

Special Weather Statement, NWS Atlanta, GA

August 5, 2011Rockdale County, Walton County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 5, 2011, 8:03 PM EDT for Rockdale County, Walton County, Georgia. It was in force for 27 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 5, 2011, 8:03 PM EDT (00:03 UTC)
Expired: Aug 5, 2011, 8:30 PM EDT
In force: 27 min
Issued by: NWS Atlanta, GA

Counties Rockdale County, GA, Walton County, GA

The radar

The Atlanta radar (KFFC), 78 km from the middle of the area, began a volume at 00:03 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 73 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: 1225 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1678 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: -38 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.

827 
WWUS82 KFFC 060003
SPSFFC

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
803 PM EDT FRI AUG 5 2011

GAZ034-046>048-060030-
803 PM EDT FRI AUG 5 2011

...SIGNIFICANT WEATHER ADVISORY FOR EXCESSIVE LIGHTNING IN WALTON...
ROCKDALE...NEWTON AND GWINNETT COUNTIES UNTIL 830 PM EDT...

AT 759 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER WALNUT GROVE...MOVING SOUTH AT 15 MPH.

THESE STORMS HAVE THE POTENTIAL TO PRODUCE PEA SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH AS THEY MOVE
ACROSS WALTON...ROCKDALE...NEWTON AND GWINNETT COUNTIES THROUGH 830
PM EDT. SOME LOCATIONS IN THE PATH OF THESE STORMS INCLUDE BIG HAYNES
CREEK PARK...WINDSOR...YOUTH...NICHOLASVILLE...PANNELL...MONROE...
LOGANVILLE...CAMPTON...BOLD SPRINGS...BETWEEN...ROSEBUD...
SNELLVILLE...GRAYSON...WALNUT GROVE AND GUM CREEK. BRIEF HEAVY
DOWNPOURS WILL CAUSE PONDING OF WATER ON ROADWAYS.

&&

LAT...LON 3387 8365 3366 8365 3364 8404 3374 8404
      3375 8402 3376 8404 3396 8404
TIME...MOT...LOC 0003Z 004DEG 14KT 3375 8385

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 8:29 PM EDT	Special Weather Statement	FFC	DeKalb	31 min
Aug 6, 12:43 PM EDT	Special Weather Statement	FFC	Muscogee	32 min
Aug 6, 1:15 PM EDT	Special Weather Statement	FFC	Upson	30 min
Aug 6, 1:32 PM EDT	Special Weather Statement	FFC	Talbot	28 min
Aug 6, 2:01 PM EDT	Special Weather Statement	FFC	Taylor	29 min
Aug 6, 2:23 PM EDT	Special Weather Statement	FFC	Troup	37 min
Aug 6, 2:39 PM EDT	Special Weather Statement	FFC	Coweta	36 min
Aug 6, 2:54 PM EDT	Special Weather Statement	FFC	Hancock	51 min
Aug 6, 3:11 PM EDT	Special Weather Statement	FFC	Coweta	34 min
Aug 6, 3:42 PM EDT	Special Weather Statement	FFC	Fayette	33 min
Aug 6, 3:43 PM EDT	Special Weather Statement	FFC	Fayette	32 min
Aug 6, 4:01 PM EDT	Special Weather Statement	FFC	Spalding	29 min
Aug 6, 4:49 PM EDT	Special Weather Statement	FFC	Clayton, Henry, Spalding	26 min
Aug 6, 5:05 PM EDT	Special Weather Statement	FFC	Douglas	25 min
Aug 6, 5:08 PM EDT	Special Weather Statement	FFC	Butts, Jasper	37 min
Aug 6, 5:18 PM EDT	Special Weather Statement	FFC	DeKalb	27 min
Aug 6, 5:28 PM EDT	Special Weather Statement	FFC	Laurens	32 min
Aug 6, 5:44 PM EDT	Special Weather Statement	FFC	DeKalb, Fulton	31 min
Aug 6, 6:10 PM EDT	Special Weather Statement	FFC	Johnson	35 min
Aug 6, 6:52 PM EDT	Special Weather Statement	FFC	Glascock, Warren, Washington	23 min
Aug 6, 7:02 PM EDT	Severe Thunderstorm Warning	FFC	Hancock, Washington	43 min
Aug 6, 7:11 PM EDT	Special Weather Statement	FFC	Montgomery, Toombs	34 min
Aug 6, 7:25 PM EDT	Special Weather Statement	FFC	Glascock, Jefferson, Warren	35 min
Aug 6, 7:39 PM EDT	Severe Thunderstorm Warning	FFC	Glascock, Jefferson, Warren	36 min

Nearby

Special Weather Statements in Georgia, 2011 Every special weather statement 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.