Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 59, NWS Atlanta, GA

July 17, 2013Lumpkin County, Union County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 17, 2013, 9:48 PM EDT for Lumpkin County, Union County, Georgia. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 17, 2013, 9:48 PM EDT (01:48 UTC)
Expired: Jul 18, 2013, 3:45 AM EDT
In force: 6 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

Counties Lumpkin County, GA, Union County, GA

The radar

The Atlanta radar (KFFC), 150 km from the middle of the area, began a volume at 01:48 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, 1.8 hours before the alert went out and 147 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: 171 J/kg
Mixed-layer CIN: -219 J/kg
Mixed-layer LCL: 1542 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 105 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.

369 
WGUS52 KFFC 180148
FFWFFC
GAC187-291-180745-
/O.NEW.KFFC.FF.W.0059.130718T0148Z-130718T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
948 PM EDT WED JUL 17 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL LUMPKIN COUNTY IN NORTH CENTRAL GEORGIA
  SOUTHWESTERN UNION COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 345 AM EDT

* AT 939 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  3.5 TO 4 INCHES OF RAIN HAD FALLEN OVER SOUTHERN UNION AND NORTH   
  CENTRAL LUMPKIN COUNTIES SINCE 330 PM EDT...WITH LOCALLY HIGHER    
  AMOUNTS...RESULTING IN FLASH FLOODING. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GOOCH      
  MOUNTAIN SHELTER AND HAWK MOUNTAIN SHELTER...AND THOSE AREAS IN    
  THE OCOEE...YAHOOLA...WARD...AND WILDHOG CREEK BASINS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF UP TO 0.5 INCHES ARE POSSIBLE IN THE 
WARNED AREA THROUGH TONIGHT.

IN HILLY TERRAIN THERE ARE LOW WATER CROSSINGS WHICH ARE POTENTIALLY
DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED
ROADS...FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF SWIFTLY
FLOWING WATER TO CARRY VEHICLES AWAY.

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 3460 8398 3463 8415 3466 8415 3470 8410
      3466 8394

$$

1 follow-up statement

333 
WGUS72 KFFC 180547
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
147 AM EDT THU JUL 18 2013

GAC187-291-180557-
/O.CAN.KFFC.FF.W.0059.000000T0000Z-130718T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
UNION GA-LUMPKIN GA-
147 AM EDT THU JUL 18 2013

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL LUMPKIN AND
SOUTHWESTERN UNION 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 3460 8398 3463 8415 3466 8415 3470 8410
      3466 8394

$$

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	Twiggs	24 min
Jul 17, 8:12 PM EDT	Severe Thunderstorm Warning	FFC	Madison, Oglethorpe, Wilkes	48 min
Jul 17, 8:13 PM EDT	Special Weather Statement	FFC	Newton, Rockdale, Walton	32 min
Jul 17, 8:19 PM EDT	Special Weather Statement	FFC	Jones	26 min
Jul 17, 8:30 PM EDT	River Flood Warning	FFC	DeKalb, Fulton	8 hr
Jul 17, 8:34 PM EDT	Special Weather Statement	FFC	Marion, Taylor	26 min
Jul 17, 8:41 PM EDT	Severe Thunderstorm Warning	FFC	Greene, Taliaferro	49 min
Jul 17, 8:47 PM EDT	Special Weather Statement	FFC	Bibb, Butts, Jasper, Jones, Monroe, Newton	43 min
Jul 17, 8:47 PM EDT	Severe Thunderstorm Warning	FFC	Clarke, Oconee	43 min
Jul 17, 8:50 PM EDT	Special Weather Statement	FFC	Lumpkin, White	40 min
Jul 17, 9:03 PM EDT	Special Weather Statement	FFC	Marion, Taylor	27 min
Jul 17, 9:06 PM EDT	Severe Thunderstorm Warning	FFC	Morgan, Walton	39 min
Jul 17, 9:07 PM EDT	Severe Thunderstorm Warning	FFC	Butts, Jasper, Jones, Monroe	38 min
Jul 17, 9:15 PM EDT	Severe Thunderstorm Warning	FFC	Greene, Putnam	45 min
Jul 17, 9:20 PM EDT	Flash Flood Warning	FFC	Newton	6 hr
Jul 17, 9:30 PM EDT	Special Weather Statement	FFC	Glascock, Warren	45 min
Jul 17, 9:35 PM EDT	Special Weather Statement	FFC	Lamar, Pike, Spalding, Upson	25 min
Jul 17, 10:43 PM EDT	Special Weather Statement	FFC	Bleckley, Dooly, Houston, Macon, Pulaski, Twiggs	32 min
Jul 17, 11:12 PM EDT	Special Weather Statement	FFC	Dooly, Houston, Macon, Peach	33 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.