Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 321, NWS Atlanta, GA

August 31, 2017Toombs County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 31, 2017, 4:48 PM EDT for Toombs County, Georgia. It was in force for 16 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 31, 2017, 4:48 PM EDT (20:48 UTC)
Expired
Aug 31, 2017, 5:04 PM EDT
In force
16 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Toombs County, GA

The radar

The Robins AFB radar (KJGX), 119 km from the middle of the area, began a volume at 20:49 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

Jacksonville, FL (KJAX), launched 12:00Z, 8.8 hours before the alert went out and 193 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, Jacksonville, FL at 12:00Z on 2017-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1403 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, Jacksonville, FL at 12:00Z on 2017-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 square meters per square second.193958Sfc1 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
1403 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
744 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
72 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

As transmitted.

053 
WUUS52 KFFC 312048
SVRFFC
GAC279-312130-
/O.NEW.KFFC.SV.W.0321.170831T2048Z-170831T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
448 PM EDT THU AUG 31 2017

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Northeastern Toombs County in southeastern Georgia...

* Until 530 PM EDT

* At 448 PM EDT, a severe thunderstorm was located over Ponderosa, or
  near Lyons, moving northeast at 40 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  Lyons, Vidalia, Santa Claus, Ohoopee, New Branch and Ponderosa. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

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 3214 8220 3206 8220 3204 8224 3219 8238
      3231 8223 3226 8222 3224 8221 3223 8221
      3218 8219 3216 8218
TIME...MOT...LOC 2048Z 230DEG 33KT 3218 8225 

HAIL...<.75IN
WIND...60MPH
 
$$
1 follow-up statement
781 
WWUS52 KFFC 312104
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
504 PM EDT THU AUG 31 2017

GAC279-312113-
/O.CAN.KFFC.SV.W.0321.000000T0000Z-170831T2130Z/
Toombs GA-
504 PM EDT THU AUG 31 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN TOOMBS COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning has been cancelled.

LAT...LON 3214 8220 3206 8220 3204 8224 3219 8238
      3231 8223 3226 8222 3224 8221 3223 8221
      3218 8219 3216 8218
TIME...MOT...LOC 2102Z 230DEG 33KT 3227 8212 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 31, 12:26 PM EDTSpecial Weather StatementFFCSchley34 min
Aug 31, 12:46 PM EDTSpecial Weather StatementFFCSumter29 min
Aug 31, 12:51 PM EDTSpecial Weather StatementFFCMacon24 min
Aug 31, 1:02 PM EDTSevere Thunderstorm WarningFFCMacon28 min
Aug 31, 1:25 PM EDTSevere Thunderstorm WarningFFCHouston, Macon, Peach50 min
Aug 31, 1:28 PM EDTSpecial Weather StatementFFCCrisp, Dooly, Pulaski47 min
Aug 31, 1:43 PM EDTSpecial Weather StatementFFCJones32 min
Aug 31, 1:59 PM EDTSpecial Weather StatementFFCTwiggs, Wilkinson46 min
Aug 31, 2:19 PM EDTSpecial Weather StatementFFCBleckley, Dodge, Wilcox26 min
Aug 31, 2:38 PM EDTSpecial Weather StatementFFCWarren37 min
Aug 31, 2:48 PM EDTSpecial Weather StatementFFCDodge, Laurens, Washington, Wilcox27 min
Aug 31, 3:23 PM EDTSpecial Weather StatementFFCTelfair37 min
Aug 31, 3:27 PM EDTSpecial Weather StatementFFCWarren33 min
Aug 31, 3:38 PM EDTWind AdvisoryFFCBartow, Carroll, Catoosa, Chattooga, Cherokee, Cobb and 18 more28 hr
Aug 31, 3:53 PM EDTSpecial Weather StatementFFCMontgomery, Wheeler37 min
Aug 31, 4:22 PM EDTSpecial Weather StatementFFCToombs23 min
Aug 31, 4:28 PM EDTSpecial Weather StatementFFCEmanuel32 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2017Every severe thunderstorm warning in 2017

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.