Alert archive / Georgia / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 178, NWS Atlanta, GA

August 18, 20144 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 18, 2014, 8:57 PM EDT for 4 counties in Georgia. It was in force for 33 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 18, 2014, 8:57 PM EDT (00:57 UTC)
Expired
Aug 18, 2014, 9:30 PM EDT
In force
33 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

Counties Jasper County, GA, Morgan County, GA, Newton County, GA, Walton County, GA

The radar

The Robins AFB radar (KJGX), 101 km from the middle of the area, began a volume at 00:58 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, 1.0 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 00:00Z on 2014-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 594 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 00:00Z on 2014-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 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
594 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
1509 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
45 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.

523 
WUUS52 KFFC 190057
SVRFFC
GAC159-211-217-297-190130-
/O.NEW.KFFC.SV.W.0178.140819T0057Z-140819T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
857 PM EDT MON AUG 18 2014

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN JASPER COUNTY IN CENTRAL GEORGIA
  MORGAN COUNTY IN NORTH CENTRAL GEORGIA
  EAST CENTRAL NEWTON COUNTY IN NORTH CENTRAL GEORGIA
  SOUTH CENTRAL WALTON COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 930 PM EDT

* AT 854 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS UP TO 60
  MPH.  THIS STORM WAS LOCATED NEAR NEWBORN...MOVING EAST AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  RUTLEDGE...MADISON AND BUCKHEAD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3347 8333 3343 8355 3347 8375 3353 8380
      3365 8379 3374 8346 3370 8340 3365 8336
      3363 8336 3362 8335
TIME...MOT...LOC 0057Z 266DEG 30KT 3356 8367

$$
1 follow-up statement
166 
WWUS52 KFFC 190115
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
915 PM EDT MON AUG 18 2014

GAC217-297-190126-
/O.CAN.KFFC.SV.W.0178.000000T0000Z-140819T0130Z/
NEWTON GA-WALTON GA-
915 PM EDT MON AUG 18 2014

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL WALTON AND EAST
CENTRAL NEWTON COUNTIES IS CANCELLED...

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 3347 8333 3343 8355 3346 8368 3355 8368
      3362 8362 3366 8348 3367 8338 3366 8337
      3362 8335
TIME...MOT...LOC 0116Z 266DEG 30KT 3357 8348

$$

GAC159-211-190130-
/O.CON.KFFC.SV.W.0178.000000T0000Z-140819T0130Z/
MORGAN GA-JASPER GA-
915 PM EDT MON AUG 18 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM EDT
FOR NORTHEASTERN JASPER AND SOUTHERN MORGAN COUNTIES...

AT 913 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR MADISON..MOVING EAST
AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
BUCKHEAD

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3347 8333 3343 8355 3346 8368 3355 8368
      3362 8362 3366 8348 3367 8338 3366 8337
      3362 8335
TIME...MOT...LOC 0116Z 266DEG 30KT 3357 8348

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 8:03 PM EDTSpecial Weather StatementFFCSpalding27 min
Aug 18, 8:23 PM EDTSpecial Weather StatementFFCClarke, Oconee37 min
Aug 18, 8:23 PM EDTSevere Thunderstorm WarningFFCButts, DeKalb, Henry, Newton, Rockdale37 min
Aug 18, 8:45 PM EDTSpecial Weather StatementFFCJasper30 min
Aug 18, 8:51 PM EDTSpecial Weather StatementFFCMadison, Oglethorpe24 min
Aug 19, 10:41 AM EDTSpecial Weather StatementFFCLaurens, Montgomery, Telfair, Treutlen, Wheeler34 min
Aug 19, 11:19 AM EDTSpecial Weather StatementFFCMontgomery, Toombs, Treutlen26 min
Aug 19, 11:43 AM EDTSpecial Weather StatementFFCToombs17 min
Aug 19, 4:31 PM EDTSpecial Weather StatementFFCTreutlen29 min
Aug 19, 4:32 PM EDTSpecial Weather StatementFFCJohnson28 min
Aug 19, 4:57 PM EDTSpecial Weather StatementFFCTreutlen33 min
Aug 19, 5:13 PM EDTSpecial Weather StatementFFCMuscogee32 min
Aug 19, 5:41 PM EDTSpecial Weather StatementFFCLaurens34 min
Aug 19, 5:44 PM EDTSpecial Weather StatementFFCTreutlen31 min
Aug 19, 5:54 PM EDTSpecial Weather StatementFFCCobb21 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.