Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 313, NWS Atlanta, GA

August 6, 2017Glascock County, Jefferson County, Washington County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 6, 2017, 4:32 PM EDT for Glascock County, Jefferson County, Washington County, Georgia. It was in force for 28 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 6, 2017, 4:32 PM EDT (20:32 UTC)
Expired: Aug 6, 2017, 5:00 PM EDT
In force: 28 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Glascock County, GA, Jefferson County, GA, Washington County, GA

The radar

The Robins AFB radar (KJGX), 93 km from the middle of the area, began a volume at 20:32 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 12:00Z, 8.5 hours before the alert went out and 176 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: 942 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 782 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

254 
WUUS52 KFFC 062032
SVRFFC
GAC125-163-303-062100-
/O.NEW.KFFC.SV.W.0313.170806T2032Z-170806T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
432 PM EDT SUN AUG 6 2017

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Glascock County in east central Georgia...
  Northeastern Washington County in east central Georgia...
  Northwestern Jefferson County in east central Georgia...

* Until 500 PM EDT

* At 432 PM EDT, a severe thunderstorm was located near Warthen, or
  near Sandersville, moving northeast at 25 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. 

* Locations impacted include...
  Sandersville, Gibson, Stapleton, Avera, Mitchell, Edge Hill,
  Edgehill, Downs, Warthen, Grange, Stapletons Crossroads, Agricola
  and Bastonville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. 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 3313 8242 3298 8279 3309 8289 3326 8274
      3327 8270 3328 8267 3331 8263 3331 8262
      3332 8259 3333 8257 3330 8250 3326 8240
TIME...MOT...LOC 2032Z 228DEG 23KT 3305 8281 

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 2:24 PM EDT	Special Weather Statement	FFC	Jefferson	36 min
Aug 6, 3:28 PM EDT	Special Weather Statement	FFC	Putnam	32 min
Aug 6, 3:58 PM EDT	Special Weather Statement	FFC	Hancock	32 min
Aug 6, 4:29 PM EDT	Special Weather Statement	FFC	Glascock, Washington	31 min
Aug 6, 4:56 PM EDT	Special Weather Statement	FFC	Bartow, Gordon	34 min
Aug 6, 5:03 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Gordon	27 min
Aug 6, 5:32 PM EDT	Special Weather Statement	FFC	Cherokee	28 min
Aug 6, 5:59 PM EDT	Special Weather Statement	FFC	Cherokee, Gilmer, Murray, Pickens	46 min
Aug 6, 7:10 PM EDT	Special Weather Statement	FFC	Floyd	35 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2017 Every 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.