Alert archive / Georgia / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 247, NWS Atlanta, GA

September 3, 20144 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Sep 3, 2014, 6:12 PM EDT for 4 counties in Georgia. It was in force for 33 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Sep 3, 2014, 6:12 PM EDT (22:12 UTC)
Expired
Sep 3, 2014, 6:45 PM EDT
In force
33 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

Counties Forsyth County, GA, Fulton County, GA, Gwinnett County, GA, Hall County, GA

The radar

The Atlanta radar (KFFC), 100 km from the middle of the area, began a volume at 22:12 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.

What was reported inside it

TimeReportWhereRemark
Sep 3, 6:13 PM EDTTSTM WND DMG1 Se Brookwood, GAEMERGENCY MANAGER REPORTS SEVERAL TREES DOWN IN THE SOUTHERN END OF FORSYTH COUNTY.
Sep 3, 6:20 PM EDTTSTM WND DMG3 Nne Buford Dam-Lake L, GAESTIMATED 60-70 MPH WINDS. 2 LARGE PINE TREES BLOWN OVER AND 1 HARDWOOD SNAPPED ABOUT 25 FEET UP.
Sep 3, 6:25 PM EDTTSTM WND DMG3 W Buford Dam-Lake Lan, GA2 TREES BLOWN DOWN RESULTING IN DOWNED POWER LINES.
Sep 3, 6:50 PM EDTTSTM WND DMGFlowery Branch, GASEVERAL TREES DOWNED ACROSS HALL COUNTY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.2 hours before the alert went out and 96 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 2014-09-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 637 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 2014-09-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -50 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
637 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
835 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-50 m²/s²
0-3 km storm-relative helicity
-21 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.

555 
WUUS52 KFFC 032212
SVRFFC
GAC117-121-135-139-032245-
/O.NEW.KFFC.SV.W.0247.140903T2212Z-140903T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
612 PM EDT WED SEP 3 2014

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN FORSYTH COUNTY IN NORTH CENTRAL GEORGIA
  EXTREME NORTHEASTERN FULTON COUNTY IN NORTH CENTRAL GEORGIA
  NORTHERN GWINNETT COUNTY IN NORTH CENTRAL GEORGIA
  SOUTHWESTERN HALL COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 645 PM EDT

* AT 608 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS UP
  TO 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
  REST HAVEN TO CUMMING TO JOHNS CREEK...MOVING EAST AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  SUWANEE...SUGAR HILL...BUFORD AND FLOWERY BRANCH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

IF YOU SEE WIND DAMAGE...HAIL OR FLOODING...WAIT UNTIL THE STORM HAS
PASSED...AND THEN CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8
6 6 7 6 3 4 4 6 6 OR TWEET US YOUR REPORT AT NWSATLANTA.

&&

LAT...LON 3419 8386 3404 8389 3402 8397 3402 8424
      3422 8424 3427 8401
TIME...MOT...LOC 2212Z 272DEG 5KT 3416 8401 3413 8412
          3406 8416

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 11:07 PM EDTSpecial Weather StatementFFCMurray, Whitfield38 min
Sep 2, 11:50 PM EDTSpecial Weather StatementFFCFannin, Gilmer, Murray40 min
Sep 3, 3:34 AM EDTFlash Flood WarningFFCCatoosa, Murray, Walker, Whitfield6 hr
Sep 3, 11:47 AM EDTFlash Flood WatchFFCBanks, Barrow, Bartow, Carroll, Catoosa, Chattooga and 27 more16 hr
Sep 3, 1:51 PM EDTSpecial Weather StatementFFCMarion24 min
Sep 3, 2:01 PM EDTSpecial Weather StatementFFCCarroll29 min
Sep 3, 2:42 PM EDTSpecial Weather StatementFFCCarroll33 min
Sep 3, 2:59 PM EDTSpecial Weather StatementFFCMeriwether31 min
Sep 3, 3:03 PM EDTSpecial Weather StatementFFCSumter27 min
Sep 3, 3:08 PM EDTSpecial Weather StatementFFCChattahoochee37 min
Sep 3, 3:21 PM EDTSpecial Weather StatementFFCCatoosa, Dade, Walker, Whitfield39 min
Sep 3, 3:35 PM EDTSpecial Weather StatementFFCChattahoochee, Muscogee25 min
Sep 3, 3:49 PM EDTSevere Thunderstorm WarningFFCMarion, Schley, Webster26 min
Sep 3, 3:58 PM EDTSpecial Weather StatementFFCHarris, Muscogee32 min
Sep 3, 4:14 PM EDTSpecial Weather StatementFFCMarion, Schley31 min
Sep 3, 4:28 PM EDTSpecial Weather StatementFFCTaliaferro, Warren, Wilkes32 min
Sep 3, 4:37 PM EDTSpecial Weather StatementFFCFulton23 min
Sep 3, 4:41 PM EDTSevere Thunderstorm WarningFFCClayton, DeKalb, Fulton34 min
Sep 3, 5:00 PM EDTSpecial Weather StatementFFCDeKalb30 min
Sep 3, 5:06 PM EDTSpecial Weather StatementFFCBartow, Gordon54 min
Sep 3, 5:09 PM EDTSevere Thunderstorm WarningFFCDeKalb, Fulton24 min
Sep 3, 5:23 PM EDTSpecial Weather StatementFFCBartow, Gordon37 min
Sep 3, 5:36 PM EDTSpecial Weather StatementFFCDeKalb, Fulton, Gwinnett39 min
Sep 3, 5:37 PM EDTFlash Flood WarningFFCGordon6 hr
Sep 3, 5:52 PM EDTSevere Thunderstorm WarningFFCForsyth, Fulton, Gwinnett23 min
Sep 3, 6:02 PM EDTSpecial Weather StatementFFCGilmer, Pickens28 min
Sep 3, 6:04 PM EDTSpecial Weather StatementFFCCrisp41 min
Sep 3, 6:10 PM EDTSpecial Weather StatementFFCBaldwin, Washington, Wilkinson50 min
Sep 3, 6:14 PM EDTSpecial Weather StatementFFCForsyth, Gwinnett, Jackson, Madison46 min
Sep 3, 6:27 PM EDTSevere Thunderstorm WarningFFCBibb, Monroe33 min
Sep 3, 6:37 PM EDTSevere Thunderstorm WarningFFCBanks, Forsyth, Hall, Jackson38 min
Sep 3, 6:55 PM EDTSpecial Weather StatementFFCBarrow, Newton, Rockdale, Walton50 min
Sep 3, 6:59 PM EDTSpecial Weather StatementFFCBibb, Jones31 min
Sep 3, 7:15 PM EDTSpecial Weather StatementFFCBanks, Hall, Jackson45 min
Sep 3, 7:24 PM EDTSpecial Weather StatementFFCJones51 min
Sep 3, 7:26 PM EDTFlash Flood WarningFFCBanks, Hall, Jackson6 hr
Sep 3, 7:45 PM EDTSpecial Weather StatementFFCPaulding45 min
Sep 3, 7:51 PM EDTSpecial Weather StatementFFCBarrow, Newton, Walton39 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2014Every severe thunderstorm warning in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.