Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 40, NWS Atlanta, GA

July 4, 2013Johnson County, Laurens County, Washington County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 4, 2013, 5:55 PM EDT for Johnson County, Laurens County, Washington County, Georgia. It was in force for 4 hr. 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 4, 2013, 5:55 PM EDT (21:55 UTC)
Expired: Jul 4, 2013, 10:00 PM EDT
In force: 4 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

Counties Johnson County, GA, Laurens County, GA, Washington County, GA

The radar

The Robins AFB radar (KJGX), 53 km from the middle of the area, began a volume at 21:56 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 4, 5:57 PM EDT	FLASH FLOOD	Wrightsville, GA	SEVERAL ROADS WASHED OUT IN AND AROUND THE CITY. A COUPLE HOMES ALSO HAVE WATER IN THEM

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, 9.9 hours before the alert went out and 173 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: 430 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 453 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 153 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

931 
WGUS52 KFFC 042155
FFWFFC
GAC167-175-303-050200-
/O.NEW.KFFC.FF.W.0040.130704T2155Z-130705T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
555 PM EDT THU JUL 4 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN LAURENS COUNTY IN CENTRAL GEORGIA
  WESTERN JOHNSON COUNTY IN EAST CENTRAL GEORGIA
  SOUTHERN WASHINGTON COUNTY IN EAST CENTRAL GEORGIA

* UNTIL 1000 PM EDT

* AT 550 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH   
FLOODING FROM A SERIES OF THUNDERSTORMS MOVING ACROSS THE AREA.  
ADDITIONAL STORMS LOCATED 12 MILES SOUTHEAST OF EAST   
DUBLIN..MOVING NORTH AT 10 MPH WILL BE IMPACTING THE SAME AREAS.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WRIGHTSVILLE AND HARRISON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE WARNED 
AREA.

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...
EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER
GROUND.

&&

LAT...LON 3289 8291 3290 8262 3255 8263 3254 8290

$$
30

2 follow-up statements

810 
WGUS72 KFFC 042350
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
750 PM EDT THU JUL 4 2013

GAC167-175-303-050200-
/O.CON.KFFC.FF.W.0040.000000T0000Z-130705T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON GA-LAURENS GA-JOHNSON GA-
750 PM EDT THU JUL 4 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT FOR
WESTERN JOHNSON...NORTHEASTERN LAURENS AND SOUTH CENTRAL WASHINGTON
COUNTIES...

AT 741 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS CONTINUED TO REPORT 
FLASH FLOODING INCLUDING SEVERAL ROADS WASHED OUT AND OR CLOSED IN THE 
WRIGHTSVILLE AREA.  DOPPLER RADAR ESTIMATES THAT 2 TO 3 INCHES OF 
RAIN HAS FALLEN IN THE PAST 3 HOURS OVER THE WARNED AREA WITH AN 
ADDITIONAL 0.25 TO 0.50 INCHES POSSIBLE OVER THE NEXT FEW HOURS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 3289 8291 3290 8262 3255 8263 3254 8290

$$
30

991 
WGUS72 KFFC 050152
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
952 PM EDT THU JUL 4 2013

GAC167-175-303-050202-
/O.EXP.KFFC.FF.W.0040.000000T0000Z-130705T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON GA-LAURENS GA-JOHNSON GA-
952 PM EDT THU JUL 4 2013

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1000 PM EDT FOR WESTERN
JOHNSON...NORTHEASTERN LAURENS AND SOUTH CENTRAL WASHINGTON
COUNTIES...

IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6. YOU CAN ALSO TWEET YOUR REPORT
USING HASHTAG GAWX.

LAT...LON 3289 8291 3290 8262 3255 8263 3254 8290

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 8:12 PM EDT	Flash Flood Warning	FFC	Union	3 hr
Jul 3, 9:30 PM EDT	Special Weather Statement	FFC	Macon, Schley, Taylor	30 min
Jul 3, 9:33 PM EDT	Special Weather Statement	FFC	Dodge, Laurens, Wheeler	27 min
Jul 3, 9:37 PM EDT	Special Weather Statement	FFC	Glascock, Warren	23 min
Jul 3, 9:55 PM EDT	Special Weather Statement	FFC	Macon, Talbot, Taylor	35 min
Jul 3, 9:56 PM EDT	Special Weather Statement	FFC	Laurens	34 min
Jul 3, 10:00 PM EDT	Severe Thunderstorm Warning	FFC	Talbot, Taylor, Upson	30 min
Jul 3, 10:25 PM EDT	Severe Thunderstorm Warning	FFC	Meriwether, Pike, Talbot, Upson	50 min
Jul 3, 11:05 PM EDT	Special Weather Statement	FFC	Coweta, Meriwether, Pike	40 min
Jul 3, 11:10 PM EDT	Special Weather Statement	FFC	Baldwin, Greene, Hancock	35 min
Jul 4, 1:33 AM EDT	River Flood Warning	FFC	Dawson, Forsyth	4 hr
Jul 4, 9:43 AM EDT	River Flood Warning	FFC	Coweta, Fayette, Spalding	15 hr
Jul 4, 2:25 PM EDT	Special Weather Statement	FFC	Hall	35 min
Jul 4, 2:40 PM EDT	Special Weather Statement	FFC	Taliaferro, Warren	35 min
Jul 4, 3:00 PM EDT	Special Weather Statement	FFC	Towns, Union, White	45 min
Jul 4, 3:11 PM EDT	Special Weather Statement	FFC	Clarke, Greene, Morgan, Oconee, Putnam	49 min
Jul 4, 4:43 PM EDT	Special Weather Statement	FFC	Johnson, Treutlen, Washington	47 min
Jul 4, 4:49 PM EDT	Special Weather Statement	FFC	Butts, Clayton, Fayette, Henry, Jasper, Lamar and 3 more	41 min
Jul 4, 6:27 PM EDT	Special Weather Statement	FFC	Bartow, Cherokee, Forsyth, Gordon, Pickens	33 min
Jul 4, 7:16 PM EDT	Special Weather Statement	FFC	Catoosa, Whitfield	44 min

Nearby

Flash Flood Warnings in Georgia, 2013 Every flash flood warning in 2013

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.