Alert archive / Georgia / Tornado Warnings in 2017

Tornado Warning 79, NWS Atlanta, GA

August 4, 2017Wilkinson County, Georgia

NWS Atlanta, GA issued this tornado warning at Aug 4, 2017, 8:53 PM EDT for Wilkinson County, Georgia. It was in force for 52 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 4, 2017, 8:53 PM EDT (00:53 UTC)
Expired: Aug 4, 2017, 9:45 PM EDT
In force: 52 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Wilkinson County, GA

The radar

The Robins AFB radar (KJGX), 34 km from the middle of the area, began a volume at 00:53 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, 0.9 hours before the alert went out and 139 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 845 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1238 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

434 
WFUS52 KFFC 050053
TORFFC
GAC319-050145-
/O.NEW.KFFC.TO.W.0079.170805T0053Z-170805T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Peachtree City GA
853 PM EDT FRI AUG 4 2017

The National Weather Service in Peachtree City has issued a

* Tornado Warning for...
  Wilkinson County in central Georgia...

* Until 945 PM EDT
    
* At 853 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Gordon, or 8 miles west of Irwinton, moving east
  at 20 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* Locations impacted include...
  Irwinton, Gordon, Ivey, McIntyre and Toomsboro. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

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 3279 8296 3272 8331 3289 8340 3298 8320
      3297 8317 3298 8317 3299 8318 3301 8314
      3300 8312 3298 8312 3293 8306 3288 8305
      3288 8304 3286 8303 3285 8299 3284 8297
TIME...MOT...LOC 0053Z 248DEG 15KT 3282 8331 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

1 follow-up statement

598 
WWUS52 KFFC 050137
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
937 PM EDT FRI AUG 4 2017

GAC319-050146-
/O.EXP.KFFC.TO.W.0079.000000T0000Z-170805T0145Z/
Wilkinson GA-
937 PM EDT FRI AUG 4 2017

...THE TORNADO WARNING FOR WILKINSON COUNTY WILL EXPIRE AT 945 PM
EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning will be allowed to expire.  However gusty winds
are still possible with this thunderstorm.

LAT...LON 3279 8296 3272 8331 3289 8340 3298 8320
      3297 8317 3298 8317 3299 8318 3301 8314
      3300 8312 3298 8312 3293 8306 3288 8305
      3288 8304 3286 8303 3285 8299 3284 8297
TIME...MOT...LOC 0136Z 248DEG 15KT 3289 8311 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 8:22 PM EDT	Special Weather Statement	FFC	Bibb	53 min
Aug 4, 8:23 PM EDT	Special Weather Statement	FFC	Talbot	67 min
Aug 4, 8:27 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Dade, Walker, Whitfield	48 min
Aug 4, 8:37 PM EDT	Severe Thunderstorm Warning	FFC	Baldwin, Twiggs, Wilkinson	38 min
Aug 4, 8:40 PM EDT	Flash Flood Warning	FFC	Bibb	6 hr
Aug 4, 8:42 PM EDT	Special Weather Statement	FFC	Jackson	48 min
Aug 4, 8:59 PM EDT	Special Weather Statement	FFC	Towns, Union	46 min
Aug 4, 9:36 PM EDT	Special Weather Statement	FFC	Washington	39 min
Aug 4, 9:42 PM EDT	Special Weather Statement	FFC	Barrow, Jackson	48 min
Aug 4, 9:57 PM EDT	Special Weather Statement	FFC	Whitfield	48 min
Aug 5, 12:46 AM EDT	Special Weather Statement	FFC	Coweta, Fayette	44 min
Aug 5, 7:33 PM EDT	Special Weather Statement	FFC	Hancock	42 min

Nearby

Tornado Warnings in Georgia, 2017 Every tornado warning in 2017 Tornadoes 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.