Alert archive / Georgia / Flash Flood Warnings in 2018

Flash Flood Warning 39, NWS Atlanta, GA

August 3, 2018Toombs County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 3, 2018, 8:07 PM EDT for Toombs County, Georgia. It was in force for 6 hr. 8 reports 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
Aug 3, 2018, 8:07 PM EDT (00:07 UTC)
Expired
Aug 4, 2018, 2:00 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

County Toombs County, GA

The radar

The Robins AFB radar (KJGX), 126 km from the middle of the area, began a volume at 00:09 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
Aug 3, 11:00 PM EDTFLASH FLOOD2 Se New Branch, GAROAD CLOSURES DUE TO FLOODING ON THE ROADWAYS ON JACK COLLINS RD AND LEVY CAVE RD, NEAR THE INTERSECTION OF THE TWO ROADS.
Aug 3, 11:00 PM EDTFLASH FLOOD3 E New Branch, GAROAD CLOSURE DUE TO FLOODING ON THE ROADWAY AT THE INTERSECTION OF HWY 56 AND ERNEST WEBBER RD.
Aug 3, 11:00 PM EDTFLASH FLOOD3 Se New Branch, GAROAD CLOSEURE DUE TO FLOODING ON ROADWAY AT MA BRADDY RD.
Aug 3, 11:00 PM EDTFLASH FLOOD3 Se New Branch, GAROAD CLOSURE DUE TO WATER ON THE ROADWAY ON BUD CLIFTON RD, JIM SHUMAN RD, AND BEN USHER RD.
Aug 3, 11:00 PM EDTFLASH FLOOD3 S Johnson Corner, GAROAD CLOSED DUE TO WATER ON THE ROADWAY ON MARVIN CHURCH RD.
Aug 3, 11:00 PM EDTFLASH FLOOD3 Sse Johnson Corner, GAROAD CLOSURE ON JOHN DASHER RD BETWEEN HAYDEN JONES RD AND CLIFFORD ROGERS RD DUE TO FLOODING ON THE ROADWAY.
Aug 3, 11:00 PM EDTFLASH FLOOD5 Sse New Branch, GAROAD CLOSURE DUE TO WATER ON THE ROADWAY AT THE INTERSECTION OF HWY 147 AND HWY 178.
Aug 3, 11:00 PM EDTFLASH FLOOD5 Sse New Branch, GAROAD CLOSURE ON JOHN DASHER RD BETWEEN HAYDEN JONES RD AND CLIFFORD ROGERS RD DUE TO FLOODING ON THE ROADWAY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 0.1 hours before the alert went out and 176 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, Jacksonville, FL at 00:00Z on 2018-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2382 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, Jacksonville, FL at 00:00Z on 2018-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 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
2382 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
920 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

315 
WGUS52 KFFC 040007
FFWFFC
GAC279-040600-
/O.NEW.KFFC.FF.W.0039.180804T0007Z-180804T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
807 PM EDT FRI AUG 3 2018

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Southeastern Toombs County in southeastern Georgia...

* Until 200 AM EDT.

* At 806 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  New Branch and Johnson Corner. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3199 8222 3194 8228 3194 8230 3195 8231
      3193 8231 3193 8233 3201 8233 3207 8232
      3214 8220 3213 8219

$$
1 follow-up statement
206 
WGUS72 KFFC 040600
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
200 AM EDT SAT AUG 4 2018

GAC279-040610-
/O.EXP.KFFC.FF.W.0039.000000T0000Z-180804T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Toombs GA-
200 AM EDT SAT AUG 4 2018

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN TOOMBS COUNTY HAS
EXPIRED...

Flood waters have receded. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 3199 8222 3194 8228 3194 8230 3195 8231
      3193 8231 3193 8233 3201 8233 3207 8232
      3214 8220 3213 8219

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 8:52 PM EDTRiver Flood WarningFFCClayton, Fayette, Spalding13 hr
Aug 3, 10:02 PM EDTSpecial Weather StatementFFCWheeler28 min
Aug 4, 12:17 PM EDTRiver Flood WarningFFCBibb, Houston, Jones, Monroe, Twiggs10 hr
Aug 4, 5:42 PM EDTSpecial Weather StatementFFCGwinnett48 min
Aug 4, 6:07 PM EDTRiver Flood WarningFFCFayette, Spalding15 hr

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.