Alert archive / Georgia / Flash Flood Warnings in 2018

Flash Flood Warning 6, NWS Atlanta, GA

May 23, 2018Harris County, Muscogee County, Georgia

NWS Atlanta, GA issued this flash flood warning at May 23, 2018, 2:22 AM EDT for Harris County, Muscogee 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
May 23, 2018, 2:22 AM EDT (06:22 UTC)
Expired
May 23, 2018, 8:15 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Harris County, GA, Muscogee County, GA

The radar

The Maxwell AFB radar (KMXX), 70 km from the middle of the area, began a volume at 06:21 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, 6.4 hours before the alert went out and 99 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 00:00Z on 2018-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 183 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2018-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -40 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
183 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
590 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-40 m²/s²
0-3 km storm-relative helicity
-14 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

714 
WGUS52 KFFC 230622
FFWFFC
GAC145-215-231215-
/O.NEW.KFFC.FF.W.0006.180523T0622Z-180523T1215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
222 AM EDT WED MAY 23 2018

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Northwestern Muscogee County in west central Georgia...
  Southwestern Harris County in west central Georgia...

* Until 815 AM EDT.

* At 218 AM EDT, Doppler radar indicates that heavy rain has 
  expanded over western portions of Muscogee and Harris counties. 
  Around 2 to 3 inches of rain has fallen from just south of Lake 
  Harding to Green Island Hills. This area of heavy rainfall is 
  expected to continue expanding eastward into the central areas of 
  both counties over the next few hours. Flash flooding is expected 
  to begin shortly.

* Some locations that will experience flooding include...
  Columbus, Bibb City, Goat Rock Lake, Edgewood, Highland Park,
  Laurel Hills, Green Island Hills, Columbus Metropolitan Airport,
  Rose Hill, Kenwood, Avondale, Bartletts Ferry Dam, Fortson and
  Mulberry Grove.

LAT...LON 3266 8509 3268 8510 3268 8490 3246 8489
      3246 8500 3252 8500 3258 8507 3262 8509
      3263 8508 3264 8510 3264 8511

$$
1 follow-up statement
579 
WGUS72 KFFC 230922
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
522 AM EDT WED MAY 23 2018

GAC145-215-231215-
/O.CON.KFFC.FF.W.0006.000000T0000Z-180523T1215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Muscogee GA-Harris GA-
522 AM EDT WED MAY 23 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 AM EDT FOR
NORTHWESTERN MUSCOGEE AND SOUTHWESTERN HARRIS COUNTIES...

At 519 AM EDT, Doppler radar indicated that three to four inches of 
rain has fallen in western Muscogee and Harries Counties this 
morning...mainly along and west of a line from Mulberry Grove to 
Fortson to Laurel Hills. Additional rainfall amounts around an inch 
continue possible. 

Some locations that will experience flooding include...
Columbus, Bibb City, Goat Rock Lake, Edgewood, Highland Park, Laurel
Hills, Green Island Hills, Columbus Metropolitan Airport, Rose Hill,
Kenwood, Avondale, Bartletts Ferry Dam, Fortson and Mulberry Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3266 8509 3268 8510 3268 8490 3246 8489
      3246 8500 3252 8500 3258 8507 3262 8509
      3263 8508 3264 8510 3264 8511

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 23, 12:54 AM EDTSpecial Weather StatementFFCHarris, Muscogee36 min
May 23, 1:38 AM EDTSpecial Weather StatementFFCMuscogee37 min
May 23, 3:10 AM EDTSpecial Weather StatementFFCTalbot, Upson35 min
May 23, 3:48 AM EDTSpecial Weather StatementFFCTalbot, Upson27 min
May 23, 4:22 AM EDTSpecial Weather StatementFFCUpson23 min
May 23, 4:23 AM EDTSpecial Weather StatementFFCTalbot37 min
May 23, 5:17 AM EDTFlash Flood WarningFFCTalbot9 hr
May 23, 5:37 AM EDTRiver Flood WarningFFCGwinnett10 hr
May 23, 6:37 AM EDTFlash Flood WarningFFCHarris, Muscogee, Talbot8 hr
May 23, 6:57 AM EDTFlash Flood WarningFFCTalbot, Upson6 hr
May 23, 7:27 AM EDTRiver Flood WarningFFCChattahoochee, Muscogee7 hr
May 23, 8:28 AM EDTSpecial Weather StatementFFCChattahoochee, Marion, Muscogee, Schley, Taylor62 min
May 23, 8:50 AM EDTSpecial Weather StatementFFCClarke, Jackson, Madison55 min
May 23, 9:09 AM EDTFlash Flood WarningFFCChattahoochee, Marion, Muscogee, Talbot, Taylor6 hr
May 23, 10:23 AM EDTSpecial Weather StatementFFCChattahoochee, Marion, Schley67 min
May 23, 10:33 AM EDTRiver Flood WarningFFCCrawford, Talbot, Taylor, Upson42 hr
May 23, 10:39 AM EDTRiver Flood WarningFFCGwinnett2 hr
May 23, 11:27 AM EDTSpecial Weather StatementFFCMarion, Schley, Stewart, Webster48 min
May 23, 12:09 PM EDTSpecial Weather StatementFFCSumter51 min
May 23, 1:23 PM EDTSpecial Weather StatementFFCDodge, Laurens, Washington52 min
May 23, 2:31 PM EDTFlash Flood WatchFFCBaldwin, Bibb, Bleckley, Chattahoochee, Crawford, Crisp and 34 more20 hr
May 23, 2:47 PM EDTSpecial Weather StatementFFCWilcox43 min
May 23, 3:17 PM EDTSpecial Weather StatementFFCOglethorpe43 min
May 23, 3:27 PM EDTSpecial Weather StatementFFCJones48 min
May 23, 3:44 PM EDTSpecial Weather StatementFFCDodge31 min
May 23, 5:19 PM EDTSpecial Weather StatementFFCTalbot26 min
May 23, 6:44 PM EDTSpecial Weather StatementFFCTaliaferro31 min

Nearby

Flash Flood Warnings in Georgia, 2018Every flash flood warning in 2018

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.