Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 312, NWS Atlanta, GA

August 4, 2017Baldwin County, Twiggs County, Wilkinson County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 4, 2017, 8:37 PM EDT for Baldwin County, Twiggs County, Wilkinson County, Georgia. It was in force for 38 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, 8:37 PM EDT (00:37 UTC)
Expired: Aug 4, 2017, 9:15 PM EDT
In force: 38 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Baldwin County, GA, Twiggs County, GA, Wilkinson County, GA

The radar

The Robins AFB radar (KJGX), 17 km from the middle of the area, began a volume at 00:37 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, 0.6 hours before the alert went out and 126 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.

830 
WUUS52 KFFC 050037
SVRFFC
GAC009-289-319-050115-
/O.NEW.KFFC.SV.W.0312.170805T0037Z-170805T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
837 PM EDT FRI AUG 4 2017

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Southeastern Baldwin County in central Georgia...
  Wilkinson County in central Georgia...
  Northeastern Twiggs County in central Georgia...

* Until 915 PM EDT

* At 836 PM EDT, a severe thunderstorm was located over Myricks Mill,
  or 9 miles north of Jeffersonville, moving east at 20 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Irwinton, Gordon, Ivey, McIntyre, Toomsboro, Myricks Mill,
  Fitzpatrick and Ripley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This thunderstorm can produce a brief tornado and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. This storm may cause serious injury and significant
property damage.

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 3270 8344 3285 8349 3292 8338 3302 8310
      3276 8300
TIME...MOT...LOC 0036Z 253DEG 16KT 3281 8339 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

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, 8:40 PM EDT	Flash Flood Warning	FFC	Bibb	6 hr
Aug 4, 8:42 PM EDT	Special Weather Statement	FFC	Jackson	48 min
Aug 4, 8:53 PM EDT	Tornado Warning	FFC	Wilkinson	52 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

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.