Alert archive / Georgia / Special Weather Statements in 2013

Special Weather Statement, NWS Atlanta, GA

August 21, 2013Rockdale County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 21, 2013, 9:26 AM EDT for Rockdale County, Georgia. It was in force for 64 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 21, 2013, 9:26 AM EDT (13:26 UTC)
Expired
Aug 21, 2013, 10:30 AM EDT
In force
64 min
Issued by
NWS Atlanta, GA

County Rockdale County, GA

The radar

The Atlanta radar (KFFC), 58 km from the middle of the area, began a volume at 13:26 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, 1.4 hours before the alert went out and 52 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 2013-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 873 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 12:00Z on 2013-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 116 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
873 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
589 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
116 m²/s²
0-3 km storm-relative helicity
118 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.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Atlanta, GA wrote its last area forecast discussion before this special weather statement went out at Aug 21, 7:50 AM EDT, 1 hour 36 minutes earlier.

Area forecast discussion, Aug 21, 7:50 AM EDT, 1 hour 36 minutes before
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Hazardous weather outlook, Aug 21, 6:24 AM EDT, 3 hours 2 minutes before
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In the hours before

Special weather statement, Aug 21, 9:26 AM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
926 AM EDT WED AUG 21 2013

GAZ045-046-211430-
926 AM EDT WED AUG 21 2013

...SIGNIFICANT WEATHER ADVISORY FOR HEAVY RAIN IN ROCKDALE AND
EASTERN DEKALB COUNTIES UNTIL 1030 AM EDT...

AT 925 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS AND THUNDERSTORMS WITH HEAVY RAIN FALLING OVER ROCKDALE AND
EASTERN DEKALB COUNTIES.

RAINFALL AMOUNTS OF 1 TO 1.5 INCHES HAVE ALREADY FALLEN IN THE LAST
HOUR AND AN ADDITIONAL INCH OR SO CAN BE EXPECTED THROUGH 1030 AM.
HEAVY RAIN AND MINOR URBAN FLOODING MAY OCCUR IN AREAS AROUND
KLONDIKE...PANOLA MOUNTAIN STATE PARK...RICHARDSON PARK...
MAGNET...LAKEVIEW ESTATES...CONYERS...ARABIA MOUNTAIN...
REDAN...LITHONIA...MILSTEAD AND GEORGIA INTERNATIONAL HORSE PARK.
DRIVERS SHOULD USE CAUTION AS INTENSE RAINFALL WILL REDUCE
VISIBILITIES AND INCREASE THE CHANCE OF HYDROPLANING. ALLOW EXTRA
TIME TO REACH YOUR DESTINATION.

&&

LAT...LON 3380 8410 3376 8403 3376 8401 3371 8392
      3366 8393 3353 8404 3357 8411 3356 8413
      3364 8418 3365 8421
TIME...MOT...LOC 1323Z 225DEG 9KT 3368 8400

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 20, 8:13 PM EDTSpecial Weather StatementFFCChattahoochee, Macon, Marion, Muscogee, Schley, Talbot and 1 more47 min
Aug 20, 8:24 PM EDTSpecial Weather StatementFFCCrisp36 min
Aug 20, 8:39 PM EDTSevere Thunderstorm WarningFFCCrisp, Wilcox51 min
Aug 20, 8:55 PM EDTSevere Thunderstorm WarningFFCDooly, Pulaski, Wilcox50 min
Aug 20, 9:00 PM EDTSpecial Weather StatementFFCMacon, Talbot, Taylor30 min
Aug 20, 9:33 PM EDTFlash Flood WarningFFCCrisp, Dooly, Wilcox6 hr
Aug 20, 9:52 PM EDTSpecial Weather StatementFFCCrawford, Houston, Peach, Upson53 min
Aug 20, 11:03 PM EDTSpecial Weather StatementFFCDodge42 min
Aug 20, 11:37 PM EDTSpecial Weather StatementFFCLaurens, Wheeler38 min
Aug 20, 11:51 PM EDTSpecial Weather StatementFFCNewton, Rockdale24 min
Aug 21, 12:20 AM EDTSpecial Weather StatementFFCLaurens40 min
Aug 21, 4:07 AM EDTFlash Flood WatchFFCBaldwin, Bibb, Bleckley, Chattahoochee, Crawford, Crisp and 29 more17 hr
Aug 21, 10:06 AM EDTSpecial Weather StatementFFCRockdale54 min
Aug 21, 11:17 AM EDTSpecial Weather StatementFFCDeKalb58 min
Aug 21, 11:51 AM EDTFlash Flood WarningFFCDeKalb6 hr
Aug 21, 12:10 PM EDTFlash Flood WarningFFCWhite6 hr
Aug 21, 1:24 PM EDTSpecial Weather StatementFFCPolk36 min
Aug 21, 3:47 PM EDTSpecial Weather StatementFFCTelfair, Wheeler28 min
Aug 21, 4:42 PM EDTSpecial Weather StatementFFCChattooga, Dade, Walker33 min
Aug 21, 4:57 PM EDTSevere Thunderstorm WarningFFCOglethorpe, Wilkes48 min
Aug 21, 5:58 PM EDTSpecial Weather StatementFFCPolk32 min
Aug 21, 6:22 PM EDTSpecial Weather StatementFFCHaralson38 min
Aug 21, 6:58 PM EDTSpecial Weather StatementFFCMonroe32 min

Nearby

Special Weather Statements in Georgia, 2013Every special weather statement in 2013

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.