Alert archive / Georgia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 340, NWS Atlanta, GA

August 10, 2015Greene County, Morgan County, Oconee County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 10, 2015, 5:09 PM EDT for Greene County, Morgan County, Oconee County, Georgia. It was in force for 36 min. 1 report 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
Aug 10, 2015, 5:09 PM EDT (21:09 UTC)
Expired
Aug 10, 2015, 5:45 PM EDT
In force
36 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Greene County, GA, Morgan County, GA, Oconee County, GA

The radar

The Robins AFB radar (KJGX), 116 km from the middle of the area, began a volume at 21:10 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
Aug 10, 5:21 PM EDTTSTM WND DMGMadison, GATHE MORGAN COUNTY 911 CENTER REPORTED NUMEROUS TREES AND POWERLINES DOWN IN THE MADISION AREA. ONE TREE FELL ON A HOME...CAUSING DAMAGE TO THE STRUCTURE.

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, 9.2 hours before the alert went out and 114 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 2015-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 374 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 2015-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 67 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
374 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
1079 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
67 m²/s²
0-3 km storm-relative helicity
98 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.

172 
WUUS52 KFFC 102109
SVRFFC
GAC133-211-219-102145-
/O.NEW.KFFC.SV.W.0340.150810T2109Z-150810T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
509 PM EDT MON AUG 10 2015

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL MORGAN COUNTY IN NORTH CENTRAL GEORGIA...
  NORTHWESTERN GREENE COUNTY IN EAST CENTRAL GEORGIA...
  SOUTHEASTERN OCONEE COUNTY IN NORTHEASTERN GEORGIA...

* UNTIL 545 PM EDT

* AT 509 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR BOSTWICK...
  OR NEAR MADISON...MOVING EAST AT 10 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING AND TREES. 

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MADISON...BOSTWICK...BUCKHEAD...APALACHEE...GRESHAMVILLE...
  WRAYSWOOD AND FARMINGTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

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 3358 8352 3376 8354 3381 8332 3381 8329
      3380 8329 3379 8328 3376 8328 3374 8323
      3356 8322
TIME...MOT...LOC 2109Z 266DEG 9KT 3368 8345 

HAIL...1.00IN
WIND...60MPH
 
$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 2:28 PM EDTSpecial Weather StatementFFCDade, Walker32 min
Aug 10, 2:32 PM EDTSpecial Weather StatementFFCClarke28 min
Aug 10, 3:01 PM EDTSpecial Weather StatementFFCCatoosa, Chattooga, Walker44 min
Aug 10, 3:24 PM EDTSpecial Weather StatementFFCCatoosa, Chattooga, Floyd, Gordon, Murray, Whitfield36 min
Aug 10, 3:34 PM EDTSpecial Weather StatementFFCClarke, Oconee26 min
Aug 10, 3:45 PM EDTSpecial Weather StatementFFCBartow, Floyd, Gilmer, Gordon, Murray, Polk30 min
Aug 10, 3:51 PM EDTSevere Thunderstorm WarningFFCMurray24 min
Aug 10, 3:55 PM EDTSevere Thunderstorm WarningFFCClarke, Oconee35 min
Aug 10, 4:12 PM EDTSpecial Weather StatementFFCCherokee, Cobb, Dawson, Fannin, Forsyth, Haralson and 4 more48 min
Aug 10, 4:29 PM EDTSevere Thunderstorm WarningFFCGreene, Morgan, Oconee31 min
Aug 10, 4:54 PM EDTSpecial Weather StatementFFCDawson, Forsyth, Hall, Lumpkin, Towns, Union and 1 more51 min
Aug 10, 5:02 PM EDTSpecial Weather StatementFFCGreene, Morgan28 min
Aug 10, 5:06 PM EDTSevere Thunderstorm WarningFFCCherokee, Forsyth, Fulton24 min
Aug 10, 5:12 PM EDTSevere Thunderstorm WarningFFCHall33 min
Aug 10, 5:15 PM EDTSpecial Weather StatementFFCTaylor30 min
Aug 10, 5:21 PM EDTSevere Thunderstorm WarningFFCBanks24 min
Aug 10, 5:26 PM EDTFlash Flood WarningFFCMorgan6 hr
Aug 10, 5:37 PM EDTSpecial Weather StatementFFCFulton23 min
Aug 10, 5:39 PM EDTFlash Flood WarningFFCGreene6 hr
Aug 10, 5:41 PM EDTSpecial Weather StatementFFCSumter34 min
Aug 10, 5:44 PM EDTSevere Thunderstorm WarningFFCJackson31 min
Aug 10, 5:50 PM EDTSevere Thunderstorm WarningFFCCobb, Fulton25 min
Aug 10, 5:53 PM EDTSpecial Weather StatementFFCTaylor37 min
Aug 10, 5:54 PM EDTSpecial Weather StatementFFCGreene36 min
Aug 10, 6:02 PM EDTSevere Thunderstorm WarningFFCBarrow, Jackson28 min
Aug 10, 6:07 PM EDTSpecial Weather StatementFFCNewton23 min
Aug 10, 6:15 PM EDTSpecial Weather StatementFFCDeKalb, Fulton30 min
Aug 10, 6:38 PM EDTSpecial Weather StatementFFCButts, Clarke, Clayton, Fayette, Greene, Henry and 10 more52 min
Aug 10, 6:45 PM EDTSevere Thunderstorm WarningFFCButts45 min
Aug 10, 7:03 PM EDTSevere Thunderstorm WarningFFCNewton27 min
Aug 10, 7:30 PM EDTSpecial Weather StatementFFCButts, Clarke, Greene, Henry, Jasper, Madison and 5 more30 min
Aug 10, 7:56 PM EDTSpecial Weather StatementFFCBaldwin, Butts, Hancock, Jasper, Putnam49 min
Aug 10, 7:59 PM EDTSpecial Weather StatementFFCHeard61 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2015Every severe thunderstorm warning in 2015

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.