Alert archive / Georgia / Flash Flood Warnings in 2018

Flash Flood Warning 15, NWS Atlanta, GA

May 31, 20184 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at May 31, 2018, 12:45 AM EDT for 4 counties in 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 31, 2018, 12:45 AM EDT (04:45 UTC)
Expired
May 31, 2018, 6:45 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Crawford County, GA, Talbot County, GA, Taylor County, GA, Upson County, GA

The radar

The Robins AFB radar (KJGX), 90 km from the middle of the area, began a volume at 04:48 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, 4.8 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 2018-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 231 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 2018-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.193958Sfc1 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
231 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1037 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
96 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

143 
WGUS52 KFFC 310445
FFWFFC
GAC079-263-269-293-311045-
/O.NEW.KFFC.FF.W.0015.180531T0445Z-180531T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
1245 AM EDT THU MAY 31 2018

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Southeastern Upson County in west central Georgia...
  West central Crawford County in central Georgia...
  Southeastern Talbot County in west central Georgia...
  Taylor County in west central Georgia...

* Until 645 AM EDT Thursday.

* At 1243 AM EDT, Doppler radar indicated heavy rain across the 
  warned area. Three to four inches of rain, with locally higher 
  amounts, have already fallen. Flash flooding is expected to begin 
  shortly.

* Some locations that will experience flooding include...
  Butler, Howard, Rupert, Charing, Salem, Prattsburg, Carsonville,
  Wesley Church and Fickling Mill.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

&&

LAT...LON 3240 8432 3240 8434 3238 8435 3243 8436
      3243 8438 3255 8444 3279 8440 3285 8429
      3281 8414 3256 8412 3241 8419 3240 8420
      3240 8425 3237 8425 3237 8432

$$
2 follow-up statements
727 
WGUS72 KFFC 310821
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
421 AM EDT THU MAY 31 2018

GAC079-263-269-293-311045-
/O.CON.KFFC.FF.W.0015.000000T0000Z-180531T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Upson GA-Crawford GA-Talbot GA-Taylor GA-
421 AM EDT THU MAY 31 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 AM EDT FOR
SOUTHEASTERN UPSON...WEST CENTRAL CRAWFORD...SOUTHEASTERN TALBOT AND
TAYLOR COUNTIES...

At 418 AM EDT, doppler radar showed the heavy rain has ended across 
the warned area. However, radar and gauge data indicates that 2 to 4 
inches of rain fell across the area, with locally higher amounts. 
Creeks and streams are likely still running quite high and roads, 
especially smaller, secondary roads, may still have areas of 
standing or running water over the roadway.

Some locations that may experience flooding include...
Butler, Howard, Rupert, Charing, Salem, Prattsburg, Carsonville,
Wesley Church and Fickling Mill.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

&&

LAT...LON 3240 8432 3240 8434 3238 8435 3243 8436
      3243 8438 3255 8444 3279 8440 3285 8429
      3281 8414 3256 8412 3241 8419 3240 8420
      3240 8425 3237 8425 3237 8432

$$
279 
WGUS72 KFFC 311036
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
636 AM EDT THU MAY 31 2018

GAC079-263-269-293-311045-
/O.EXP.KFFC.FF.W.0015.000000T0000Z-180531T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Upson GA-Crawford GA-Talbot GA-Taylor GA-
636 AM EDT THU MAY 31 2018

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN UPSON...WEST CENTRAL
CRAWFORD...SOUTHEASTERN TALBOT AND TAYLOR COUNTIES WILL EXPIRE AT 645
AM EDT...

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

LAT...LON 3240 8432 3240 8434 3238 8435 3243 8436
      3243 8438 3255 8444 3279 8440 3285 8429
      3281 8414 3256 8412 3241 8419 3240 8420
      3240 8425 3237 8425 3237 8432

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 8:43 PM EDTSpecial Weather StatementFFCDawson32 min
May 30, 9:20 PM EDTSpecial Weather StatementFFCWhite40 min
May 30, 10:39 PM EDTSpecial Weather StatementFFCCrawford, Macon36 min
May 30, 11:13 PM EDTSpecial Weather StatementFFCCrawford, Monroe, Schley, Taylor47 min
May 31, 12:07 AM EDTSpecial Weather StatementFFCButts, Crawford, Jasper, Lamar, Macon, Monroe and 5 more53 min
May 31, 1:54 AM EDTSpecial Weather StatementFFCHouston, Pulaski66 min
May 31, 1:45 PM EDTSpecial Weather StatementFFCWhite30 min
May 31, 2:09 PM EDTFlash Flood WarningFFCWhite6 hr
May 31, 2:17 PM EDTSpecial Weather StatementFFCCarroll28 min
May 31, 2:43 PM EDTSpecial Weather StatementFFCWhite32 min
May 31, 2:51 PM EDTFlash Flood WarningFFCWhite6 hr
May 31, 3:07 PM EDTSpecial Weather StatementFFCWhitfield38 min
May 31, 3:12 PM EDTSpecial Weather StatementFFCFannin, Towns, Union33 min
May 31, 3:20 PM EDTSevere Thunderstorm WarningFFCCatoosa, Whitfield40 min
May 31, 3:33 PM EDTSpecial Weather StatementFFCWhite27 min
May 31, 3:46 PM EDTSpecial Weather StatementFFCFannin, Union29 min
May 31, 3:58 PM EDTSevere Thunderstorm WarningFFCCatoosa, Whitfield47 min
May 31, 4:07 PM EDTSpecial Weather StatementFFCWhite38 min
May 31, 4:09 PM EDTFlash Flood Warning EmergencyFFCWhite6 hr
May 31, 4:16 PM EDTSpecial Weather StatementFFCGilmer, Union29 min
May 31, 4:36 PM EDTSevere Thunderstorm WarningFFCWhite39 min
May 31, 4:52 PM EDTSpecial Weather StatementFFCDawson, Gordon, Lumpkin, Pickens38 min
May 31, 4:59 PM EDTSpecial Weather StatementFFCGwinnett31 min
May 31, 5:38 PM EDTSpecial Weather StatementFFCBanks, Cherokee, Dawson, Gordon, Hall, Pickens22 min
May 31, 5:54 PM EDTSevere Thunderstorm WarningFFCCherokee, Dawson, Forsyth, Pickens24 min
May 31, 6:02 PM EDTSevere Thunderstorm WarningFFCBanks, Hall, Jackson20 min
May 31, 6:19 PM EDTSpecial Weather StatementFFCHeard26 min
May 31, 6:24 PM EDTSpecial Weather StatementFFCMadison36 min
May 31, 6:53 PM EDTSpecial Weather StatementFFCOglethorpe37 min
May 31, 7:00 PM EDTSpecial Weather StatementFFCWilkes30 min
May 31, 7:10 PM EDTSpecial Weather StatementFFCWalton35 min
May 31, 7:51 PM EDTSpecial Weather StatementFFCGreene, Jasper, Morgan, Newton, Rockdale24 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.