Alert archive / Georgia / Flash Flood Warnings in 2018

Flash Flood Warning 8, NWS Atlanta, GA

May 23, 2018Harris County, Muscogee County, Talbot County, Georgia

NWS Atlanta, GA issued this flash flood warning at May 23, 2018, 6:37 AM EDT for Harris County, Muscogee County, Talbot County, Georgia. It was in force for 8 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
May 23, 2018, 6:37 AM EDT (10:37 UTC)
Expired
May 23, 2018, 2:30 PM EDT
In force
8 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Harris County, GA, Muscogee County, GA, Talbot County, GA

The radar

The Atlanta radar (KFFC), 81 km from the middle of the area, began a volume at 10:41 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

TimeReportWhereRemark
May 23, 9:14 AM EDTFLASH FLOODEllerslie, GAEMERGENCY MANAGER REPORTING AT LEAST 8 COUNTY ROADS CLOSES IN THE SOUTHEAST PORTION OF HARRIS COUNTY. HWY 27 REPORTED TO HAVE SOME WATER RUNNING OVER IT. NUMEROUS TREES DOWNED ON ROADWAYS AS WELL.

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 00:00Z, 10.6 hours before the alert went out and 83 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.

782 
WGUS52 KFFC 231037
FFWFFC
GAC145-215-263-231630-
/O.NEW.KFFC.FF.W.0008.180523T1037Z-180523T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Northeastern Muscogee County in west central Georgia...
  Northwestern Talbot County in west central Georgia...
  Southeastern Harris County in west central Georgia...

* Until 1230 PM EDT.

* At 635 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between two to three inches of 
  rain has already fallen. Additional rainfall amounts of one to two 
  inches is possible.

* Some locations that will experience flooding include...
  Waverly Hall, Ellerslie, Flat Rock, Baughville, Midland and
  Cataula.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3259 8466 3283 8455 3269 8490 3254 8489

$$
3 follow-up statements
758 
WGUS72 KFFC 231403
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
1003 AM EDT WED MAY 23 2018

GAC145-215-263-231630-
/O.CON.KFFC.FF.W.0008.000000T0000Z-180523T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Muscogee GA-Talbot GA-Harris GA-
1003 AM EDT WED MAY 23 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 PM EDT FOR
NORTHEASTERN MUSCOGEE...NORTHWESTERN TALBOT AND SOUTHEASTERN HARRIS
COUNTIES...

At 1000 AM EDT, local law enforcement reported flash flooding in 
reported multiple roads closed  in the southeast portion of Harris 
County due to flash flooding along with water over Highway 27. 
Numerous trees are downed on roadways as well. Five to eight inches 
of rain have fallen across the warned area.

Some locations that will experience flooding include...
Waverly Hall, Ellerslie, Flat Rock, Baughville, Midland and Cataula. 

Additional rainfall amounts of one to two inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 3259 8466 3283 8455 3269 8490 3254 8489

$$
348 
WGUS52 KFFC 231628
FFWFFC
GAC145-215-263-231830-
/O.EXT.KFFC.FF.W.0008.000000T0000Z-180523T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
1228 PM EDT WED MAY 23 2018

The National Weather Service in Peachtree City has extended the

* Flash Flood Warning for...
  Northeastern Muscogee County in west central Georgia...
  Northwestern Talbot County in west central Georgia...
  Southeastern Harris County in west central Georgia...

* Until 230 PM EDT.

* At 1228 PM EDT, flash flooding is expected to continue across 
  portions of Muscogee, northwest Talbot and southeast Harris 
  county, prompting an extension to the Flash Flood warning. 
  Earlier, emergency management reported numerous roads and portions 
  of Highway 27 had been closed due to the excessive rainfall. Some 
  roads remain closed as of midday. Five to as much as eight inches 
  of rain has fallen since early this morning.

* Some locations that will experience flooding include...
  Waverly Hall, Ellerslie, Flat Rock, Baughville, Midland and
  Cataula.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 3259 8466 3283 8455 3269 8490 3254 8489

$$
543 
WGUS72 KFFC 231827
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
227 PM EDT WED MAY 23 2018

GAC145-215-263-231836-
/O.EXP.KFFC.FF.W.0008.000000T0000Z-180523T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Muscogee GA-Talbot GA-Harris GA-
227 PM EDT WED MAY 23 2018

...THE FLASH FLOOD WARNING FOR NORTHEASTERN MUSCOGEE...NORTHWESTERN
TALBOT AND SOUTHEASTERN HARRIS COUNTIES WILL EXPIRE AT 230 PM EDT...

The heavy rain has ended. Flood waters have begun to recede. 
Flooding is no longer expected to pose a threat. Please continue to 
heed any remaining road closures.

LAT...LON 3259 8466 3283 8455 3269 8490 3254 8489

$$

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, 2:22 AM EDTFlash Flood WarningFFCHarris, Muscogee6 hr
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, 6:57 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.