Alert archive / Georgia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 313, NWS Atlanta, GA

July 31, 2015Bibb County, Houston County, Twiggs County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 31, 2015, 4:28 PM EDT for Bibb County, Houston County, Twiggs County, Georgia. It was in force for 32 min. 1 report 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: Jul 31, 2015, 4:28 PM EDT (20:28 UTC)
Expired: Jul 31, 2015, 5:00 PM EDT
In force: 32 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Bibb County, GA, Houston County, GA, Twiggs County, GA

The radar

The Robins AFB radar (KJGX), 19 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.

What was reported inside it

Time	Report	Where	Remark
Jul 31, 4:35 PM EDT	TSTM WND DMG	Marion, GA	911 CALL CENTER HAS RECEIVED REPORTS OF AT LEAST 5 TREES DOWN ACROSS THE COUNTY. RADAR IMAGERY REVEALS MOST LIKELY IMPACTED AREAS WERE MARION AND LOCATIONS JUST WEST.

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, 8.5 hours before the alert went out and 121 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: 163 J/kg
Mixed-layer CIN: -190 J/kg
Mixed-layer LCL: 1196 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

173 
WUUS52 KFFC 312028
SVRFFC
GAC021-153-289-312100-
/O.NEW.KFFC.SV.W.0313.150731T2028Z-150731T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
428 PM EDT FRI JUL 31 2015

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  TWIGGS COUNTY IN CENTRAL GEORGIA...
  NORTHEASTERN HOUSTON COUNTY IN CENTRAL GEORGIA...
  SOUTHEASTERN BIBB COUNTY IN CENTRAL GEORGIA...

* UNTIL 500 PM EDT

* AT 428 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
  JEFFERSONVILLE...MOVING SOUTHWEST AT 20 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES. 

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  JEFFERSONVILLE...WARNER ROBINS...CENTERVILLE...ROBINS AFB...
  MARION...DISTRICT PATH...BONAIRE...TARVERSVILLE...HUBER...MYRICKS
  MILL...BULLARD...FITZPATRICK...ELBERTA...RIPLEY...MIDDLE GEORGIA
  REGIONAL AIRPORT AND ROBINS AIR FORCE BASE.

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 3243 8354 3266 8371 3269 8370 3269 8374
      3270 8374 3283 8340 3265 8326 3263 8326
TIME...MOT...LOC 2028Z 051DEG 16KT 3270 8343 

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 8:32 PM EDT	Special Weather Statement	FFC	Baldwin, Jones	43 min
Jul 31, 12:40 PM EDT	Special Weather Statement	FFC	Montgomery	35 min
Jul 31, 1:31 PM EDT	Special Weather Statement	FFC	Dodge	29 min
Jul 31, 1:44 PM EDT	Special Weather Statement	FFC	Marion	31 min
Jul 31, 2:13 PM EDT	Special Weather Statement	FFC	Treutlen	32 min
Jul 31, 2:25 PM EDT	Special Weather Statement	FFC	Marion	35 min
Jul 31, 2:32 PM EDT	Special Weather Statement	FFC	Stewart	13 min
Jul 31, 2:42 PM EDT	Severe Thunderstorm Warning	FFC	Johnson, Laurens	48 min
Jul 31, 2:58 PM EDT	Special Weather Statement	FFC	Laurens	32 min
Jul 31, 3:16 PM EDT	Special Weather Statement	FFC	Schley	29 min
Jul 31, 3:33 PM EDT	Special Weather Statement	FFC	Laurens	27 min
Jul 31, 3:52 PM EDT	Severe Thunderstorm Warning	FFC	Bleckley, Laurens, Twiggs, Wilkinson	38 min
Jul 31, 3:56 PM EDT	Severe Thunderstorm Warning	FFC	Harris	49 min
Jul 31, 4:05 PM EDT	Special Weather Statement	FFC	Dodge	25 min
Jul 31, 4:09 PM EDT	Special Weather Statement	FFC	Peach	36 min
Jul 31, 4:53 PM EDT	Special Weather Statement	FFC	Upson	37 min
Jul 31, 4:56 PM EDT	Severe Thunderstorm Warning	FFC	Bleckley, Dooly, Houston, Pulaski	34 min
Jul 31, 5:33 PM EDT	Special Weather Statement	FFC	Dooly, Wilcox	27 min
Jul 31, 5:45 PM EDT	Severe Thunderstorm Warning	FFC	Crisp, Dooly, Wilcox	45 min
Jul 31, 6:14 PM EDT	Special Weather Statement	FFC	Crisp	31 min
Jul 31, 6:23 PM EDT	Special Weather Statement	FFC	Crisp	37 min
Jul 31, 6:33 PM EDT	Special Weather Statement	FFC	Schley	27 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2015 Every severe thunderstorm warning in 2015

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.