Alert archive / Georgia / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 207, NWS Atlanta, GA

July 18, 20164 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 18, 2016, 4:25 PM EDT for 4 counties in Georgia. It was in force for 50 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 18, 2016, 4:25 PM EDT (20:25 UTC)
Expired: Jul 18, 2016, 5:15 PM EDT
In force: 50 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Barrow County, GA, Gwinnett County, GA, Rockdale County, GA, Walton County, GA

The radar

The Atlanta radar (KFFC), 84 km from the middle of the area, began a volume at 20:25 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 18, 4:46 PM EDT	TSTM WND DMG	Bold Springs, GA	SOME TREES DOWN ON HWY 81 NORTH NEAR BOLD SPRINGS. TIME ESTIMATED FROM RADAR

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, 8.4 hours before the alert went out and 79 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: 124 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 1308 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: -24 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

770 
WUUS52 KFFC 182025
SVRFFC
GAC013-135-247-297-182115-
/O.NEW.KFFC.SV.W.0207.160718T2025Z-160718T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
425 PM EDT MON JUL 18 2016

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN WALTON COUNTY IN NORTH CENTRAL GEORGIA...
  SOUTHEASTERN GWINNETT COUNTY IN NORTH CENTRAL GEORGIA...
  NORTHEASTERN ROCKDALE COUNTY IN NORTH CENTRAL GEORGIA...
  SOUTHWESTERN BARROW COUNTY IN NORTH CENTRAL GEORGIA...

* UNTIL 515 PM EDT

* AT 424 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
  LOGANVILLE...MOVING SOUTHEAST AT 10 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. 

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  LAWRENCEVILLE...WINDER...MONROE...SNELLVILLE...LOGANVILLE...
  AUBURN...DACULA...GRAYSON...WALNUT GROVE...BETHLEHEM...BETWEEN...
  CARL...JERSEY...NICHOLASVILLE...GRATIS...CAMPTON...BOLD SPRINGS...
  FORT YARGO STATE PARK...BIG HAYNES CREEK PARK AND HARBIN.

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 3386 8362 3370 8376 3372 8388 3374 8391
      3373 8392 3374 8398 3391 8403 3402 8376
TIME...MOT...LOC 2024Z 336DEG 8KT 3389 8386 

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

2 follow-up statements

262 
WWUS52 KFFC 182042
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
442 PM EDT MON JUL 18 2016

GAC013-135-247-297-182115-
/O.CON.KFFC.SV.W.0207.000000T0000Z-160718T2115Z/
WALTON GA-GWINNETT GA-ROCKDALE GA-BARROW GA-
442 PM EDT MON JUL 18 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHWESTERN WALTON...SOUTHEASTERN GWINNETT...NORTHEASTERN
ROCKDALE AND SOUTHWESTERN BARROW COUNTIES...

AT 441 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED FROM AROUND
SNELLVILLE TO LOGANVILLE AND CAMPTON...MOVING SOUTH AT 10 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. 

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WINDER...MONROE...SNELLVILLE...LOGANVILLE...GRAYSON...WALNUT
GROVE...BETHLEHEM...BETWEEN...JERSEY...NICHOLASVILLE...GRATIS...
CAMPTON...BOLD SPRINGS...FORT YARGO STATE PARK...BIG HAYNES CREEK
PARK...ROSEBUD...YOUTH AND WINDSOR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

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 3386 8362 3370 8376 3372 8388 3374 8391
      3373 8392 3374 8398 3386 8402 3398 8373
TIME...MOT...LOC 2041Z 339DEG 10KT 3382 8384 

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

620 
WWUS52 KFFC 182107
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
507 PM EDT MON JUL 18 2016

GAC013-135-247-297-182116-
/O.EXP.KFFC.SV.W.0207.000000T0000Z-160718T2115Z/
WALTON GA-GWINNETT GA-ROCKDALE GA-BARROW GA-
507 PM EDT MON JUL 18 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WALTON...
SOUTHEASTERN GWINNETT...NORTHEASTERN ROCKDALE AND SOUTHWESTERN BARROW
COUNTIES WILL EXPIRE AT 515 PM EDT...
                
THE STORM WHICH PROMPTED THE WARNING IS WEAKENING BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER GUSTY WINDS
UP TO 40 MPH AND HEAVY RAIN ARE STILL LIKELY WITH THIS THUNDERSTORM.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
PEACHTREE CITY.

LAT...LON 3386 8362 3370 8376 3372 8388 3374 8391
      3373 8392 3374 8398 3386 8402 3398 8373
TIME...MOT...LOC 2104Z 336DEG 8KT 3382 8384 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 8:06 PM EDT	Special Weather Statement	FFC	Towns	24 min
Jul 17, 8:15 PM EDT	Special Weather Statement	FFC	Walton	30 min
Jul 17, 8:19 PM EDT	Special Weather Statement	FFC	Laurens	41 min
Jul 17, 8:22 PM EDT	Special Weather Statement	FFC	Crisp, Wilcox	38 min
Jul 17, 8:43 PM EDT	Special Weather Statement	FFC	Morgan, Walton	32 min
Jul 17, 8:59 PM EDT	Special Weather Statement	FFC	Dooly	46 min
Jul 17, 9:18 PM EDT	Special Weather Statement	FFC	Fayette	27 min
Jul 17, 9:31 PM EDT	Special Weather Statement	FFC	Butts	29 min
Jul 17, 9:42 PM EDT	Special Weather Statement	FFC	Morgan, Newton, Walton	33 min
Jul 17, 9:49 PM EDT	Special Weather Statement	FFC	Fayette, Spalding	26 min
Jul 18, 12:38 PM EDT	Special Weather Statement	FFC	Banks	37 min
Jul 18, 2:22 PM EDT	Special Weather Statement	FFC	Clarke, Oconee	38 min
Jul 18, 2:25 PM EDT	Special Weather Statement	FFC	Putnam	50 min
Jul 18, 2:27 PM EDT	Special Weather Statement	FFC	Hall	48 min
Jul 18, 2:43 PM EDT	Special Weather Statement	FFC	Oglethorpe	47 min
Jul 18, 2:46 PM EDT	Special Weather Statement	FFC	Gilmer	44 min
Jul 18, 2:52 PM EDT	Special Weather Statement	FFC	Baldwin, Hancock	38 min
Jul 18, 2:53 PM EDT	Special Weather Statement	FFC	Wilkes	37 min
Jul 18, 2:55 PM EDT	Special Weather Statement	FFC	White	35 min
Jul 18, 3:13 PM EDT	Special Weather Statement	FFC	Wilkes	47 min
Jul 18, 3:35 PM EDT	Special Weather Statement	FFC	Cherokee	25 min
Jul 18, 3:52 PM EDT	Special Weather Statement	FFC	Wilkes	38 min
Jul 18, 4:01 PM EDT	Special Weather Statement	FFC	Barrow, Gwinnett, Walton	44 min
Jul 18, 4:05 PM EDT	Special Weather Statement	FFC	Forsyth	40 min
Jul 18, 4:20 PM EDT	Special Weather Statement	FFC	Catoosa	40 min
Jul 18, 4:23 PM EDT	Special Weather Statement	FFC	Glascock, Jefferson	37 min
Jul 18, 4:30 PM EDT	Special Weather Statement	FFC	Fannin, Lumpkin	45 min
Jul 18, 4:55 PM EDT	Special Weather Statement	FFC	DeKalb	35 min
Jul 18, 5:01 PM EDT	Special Weather Statement	FFC	Wilcox	44 min
Jul 18, 5:13 PM EDT	Special Weather Statement	FFC	Gwinnett, Morgan, Newton, Rockdale, Walton	47 min
Jul 18, 5:15 PM EDT	Special Weather Statement	FFC	Johnson	45 min
Jul 18, 5:35 PM EDT	Severe Thunderstorm Warning	FFC	Johnson, Laurens, Washington	40 min
Jul 18, 5:42 PM EDT	Special Weather Statement	FFC	DeKalb	33 min
Jul 18, 5:45 PM EDT	Special Weather Statement	FFC	Towns	45 min
Jul 18, 5:50 PM EDT	Special Weather Statement	FFC	Gilmer	25 min
Jul 18, 5:52 PM EDT	Special Weather Statement	FFC	Laurens	38 min
Jul 18, 6:09 PM EDT	Special Weather Statement	FFC	Johnson	51 min
Jul 18, 6:16 PM EDT	Special Weather Statement	FFC	Bleckley, Dodge, Pulaski	44 min
Jul 18, 6:21 PM EDT	Special Weather Statement	FFC	Towns, Union	39 min
Jul 18, 6:29 PM EDT	Special Weather Statement	FFC	Bleckley, Dodge, Laurens, Pulaski	31 min
Jul 18, 6:36 PM EDT	Severe Thunderstorm Warning	FFC	Bleckley, Dodge, Laurens	39 min
Jul 18, 6:59 PM EDT	Special Weather Statement	FFC	Towns, White	31 min
Jul 18, 7:03 PM EDT	Special Weather Statement	FFC	Bleckley, Houston, Laurens, Pulaski	42 min
Jul 18, 7:10 PM EDT	Special Weather Statement	FFC	Floyd	35 min
Jul 18, 7:38 PM EDT	Special Weather Statement	FFC	Dooly	22 min
Jul 18, 7:45 PM EDT	Special Weather Statement	FFC	Houston, Peach	30 min
Jul 18, 7:48 PM EDT	Special Weather Statement	FFC	Muscogee	27 min
Jul 18, 7:55 PM EDT	Severe Thunderstorm Warning	FFC	Dooly, Sumter	35 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2016 Every severe thunderstorm warning in 2016

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.