Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 319, NWS Atlanta, GA

August 31, 2017Macon County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 31, 2017, 1:02 PM EDT for Macon County, Georgia. It was in force for 28 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 31, 2017, 1:02 PM EDT (17:02 UTC)
Expired: Aug 31, 2017, 1:30 PM EDT
In force: 28 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Macon County, GA

The radar

The Robins AFB radar (KJGX), 65 km from the middle of the area, began a volume at 17:03 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.

What was reported inside it

Time	Report	Where	Remark
Aug 31, 1:07 PM EDT	TSTM WND DMG	2 Sw Fields, GA	TREE REPORTED DOWN ON DRAYTON RD.
Aug 31, 1:07 PM EDT	TSTM WND DMG	Fields, GA	POWER LINES DOWN NEAR THE INTERSECTION OF CEDAR VALLEY RD AND GA-90.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 5.0 hours before the alert went out and 125 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: 716 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 511 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 177 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 5.4

Open this sounding in Storm Lab

The text

As transmitted.

971 
WUUS52 KFFC 311702
SVRFFC
GAC193-311730-
/O.NEW.KFFC.SV.W.0319.170831T1702Z-170831T1730Z/

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

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Eastern Macon County in west central Georgia...

* Until 130 PM EDT

* At 102 PM EDT, a severe thunderstorm was located over Montezuma, or
  over Oglethorpe, moving northeast at 30 mph.

  HAZARD...60 mph wind gusts and penny size hail. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Oglethorpe, Montezuma, Marshallville, Saint Louis, Whitewater State
  Park, Clearview, Winchester and Bartlett.

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 3231 8415 3249 8393 3248 8392 3250 8392
      3249 8388 3247 8385 3238 8384 3238 8386
      3236 8386 3236 8385 3229 8385 3229 8390
      3228 8390 3225 8396 3223 8398 3219 8406
TIME...MOT...LOC 1702Z 230DEG 26KT 3229 8402 

HAIL...0.75IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 31, 12:26 PM EDT	Special Weather Statement	FFC	Schley	34 min
Aug 31, 12:46 PM EDT	Special Weather Statement	FFC	Sumter	29 min
Aug 31, 12:51 PM EDT	Special Weather Statement	FFC	Macon	24 min
Aug 31, 1:25 PM EDT	Severe Thunderstorm Warning	FFC	Houston, Macon, Peach	50 min
Aug 31, 1:28 PM EDT	Special Weather Statement	FFC	Crisp, Dooly, Pulaski	47 min
Aug 31, 1:43 PM EDT	Special Weather Statement	FFC	Jones	32 min
Aug 31, 1:59 PM EDT	Special Weather Statement	FFC	Twiggs, Wilkinson	46 min
Aug 31, 2:19 PM EDT	Special Weather Statement	FFC	Bleckley, Dodge, Wilcox	26 min
Aug 31, 2:38 PM EDT	Special Weather Statement	FFC	Warren	37 min
Aug 31, 2:48 PM EDT	Special Weather Statement	FFC	Dodge, Laurens, Washington, Wilcox	27 min
Aug 31, 3:23 PM EDT	Special Weather Statement	FFC	Telfair	37 min
Aug 31, 3:27 PM EDT	Special Weather Statement	FFC	Warren	33 min
Aug 31, 3:38 PM EDT	Wind Advisory	FFC	Bartow, Carroll, Catoosa, Chattooga, Cherokee, Cobb and 18 more	28 hr
Aug 31, 3:53 PM EDT	Special Weather Statement	FFC	Montgomery, Wheeler	37 min
Aug 31, 4:22 PM EDT	Special Weather Statement	FFC	Toombs	23 min
Aug 31, 4:28 PM EDT	Special Weather Statement	FFC	Emanuel	32 min
Aug 31, 4:48 PM EDT	Severe Thunderstorm Warning	FFC	Toombs	16 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.