Alert archive / Georgia / Flash Flood Warnings in 2021

Flash Flood Warning 42, NWS Atlanta, GA

October 6, 20214 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Oct 6, 2021, 8:55 AM EDT for 4 counties in Georgia. It was in force for 9 hr. 4 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
Oct 6, 2021, 8:55 AM EDT (12:55 UTC)
Expired
Oct 6, 2021, 6:00 PM EDT
In force
9 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Bibb County, GA, Jasper County, GA, Jones County, GA, Twiggs County, GA

The radar

The Robins AFB radar (KJGX), 48 km from the middle of the area, began a volume at 12:56 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
Oct 6, 10:45 AM EDTFLASH FLOOD1 Wsw Bradley, GAWASH OUT IN THE 200 BLOCK OF WHEELER RD
Oct 6, 11:45 AM EDTFLASH FLOOD3 Ese Round Oak, GAA SMALL WOODEN BRIDGE WAS WASHED OUT ON JACKSON RD BETWEEN HUGERFORD RD AND OTIS REDDING RD.
Oct 6, 11:45 AM EDTFLASH FLOOD5 Nw Blountsville, GABRIDGE WASHED OUT ON UNION HILL CHURCH RD NEAR SHOAL CREEK, BELIEVED TO BE THE CEDAR CREEK BRIDGE.
Oct 6, 1:54 PM EDTFLASH FLOOD2 Sw Bradley, GAGREENE SETTLEMENT ROAD IS FLOODED AND CLOSED.

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 12:00Z, 0.9 hours before the alert went out and 88 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 12:00Z on 2021-10-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 468 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2021-10-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 154 square meters per square second.19395878Sfc1 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
468 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
623 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
154 m²/s²
0-3 km storm-relative helicity
163 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.7

Open this sounding in Storm Lab

The text

As transmitted.

205 
WGUS52 KFFC 061255
FFWFFC
GAC021-159-169-289-061900-
/O.NEW.KFFC.FF.W.0042.211006T1255Z-211006T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
855 AM EDT Wed Oct 6 2021

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Northeastern Bibb County in central Georgia...
  Southeastern Jasper County in central Georgia...
  Jones County in central Georgia...
  Western Twiggs County in central Georgia...

* Until 300 PM EDT Wednesday.

* At 855 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 3 inches of 
  rain have fallen. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Macon, Gray, Clinton, Postell, Bradley, Wayside, Cross Keys, 
  Griswoldville, Round Oak, Franklinton, Jarrell Plantation, Dry 
  Branch, Hillsboro, Huber, Adgateville and Bullard.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 3319 8373 3325 8368 3325 8357 3323 8354
      3317 8355 3317 8352 3278 8345 3252 8350
      3282 8362 3295 8371 3296 8371 3297 8372
      3300 8372 3301 8373 3302 8372 3307 8374

FLASH FLOOD...RADAR INDICATED

$$
1 follow-up statement
512 
WGUS52 KFFC 061738
FFWFFC
GAC021-159-169-289-062200-
/O.EXT.KFFC.FF.W.0042.000000T0000Z-211006T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
138 PM EDT Wed Oct 6 2021

The National Weather Service in Peachtree City has extended the

* Flash Flood Warning for...
  Northeastern Bibb County in central Georgia...
  Southeastern Jasper County in central Georgia...
  Jones County in central Georgia...
  Western Twiggs County in central Georgia...

* Until 600 PM EDT.

* At 138 PM EDT, emergency management reported several road closures 
  from previous heavy rain across the warned area. Between 4 and 6 
  inches of rain have fallen. Flash flooding is already occurring.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Emergency management reported.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Macon, Gray, Clinton, Postell, Bradley, Wayside, Cross Keys, 
  Griswoldville, Round Oak, Franklinton, Jarrell Plantation, Dry 
  Branch, Hillsboro, Huber, Adgateville and Bullard.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 3319 8373 3325 8368 3325 8357 3323 8354
      3317 8355 3317 8352 3278 8345 3252 8350
      3282 8362 3295 8371 3296 8371 3297 8372
      3300 8372 3301 8373 3302 8372 3307 8374

FLASH FLOOD...OBSERVED

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 5, 10:30 PM EDTRiver Flood WarningFFCBarrow, Jackson16 hr
Oct 5, 10:37 PM EDTRiver Flood WarningFFCDeKalb, Rockdale16 hr
Oct 5, 10:45 PM EDTRiver Flood WarningFFCNewton, Rockdale16 hr
Oct 5, 10:57 PM EDTSpecial Weather StatementFFCBleckley, Dodge, Pulaski33 min
Oct 5, 11:33 PM EDTSpecial Weather StatementFFCBleckley27 min
Oct 6, 12:01 AM EDTSpecial Weather StatementFFCBleckley29 min
Oct 6, 3:27 AM EDTSpecial Weather StatementFFCCrisp63 min
Oct 6, 4:20 AM EDTSpecial Weather StatementFFCCrisp, Dooly, Houston55 min
Oct 6, 5:00 AM EDTFlash Flood WarningFFCDooly, Houston6 hr
Oct 6, 5:30 AM EDTSpecial Weather StatementFFCBibb, Houston60 min
Oct 6, 6:14 AM EDTFlash Flood WarningFFCBibb, Houston, Peach, Twiggs6 hr
Oct 6, 7:06 AM EDTSpecial Weather StatementFFCBibb, Jones54 min
Oct 6, 7:55 AM EDTSpecial Weather StatementFFCJones65 min
Oct 6, 10:19 AM EDTSpecial Weather StatementFFCUpson56 min
Oct 6, 10:22 AM EDTSpecial Weather StatementFFCPutnam53 min
Oct 6, 10:31 AM EDTFlash Flood WarningFFCCrawford, Lamar, Monroe, Upson6 hr
Oct 6, 10:42 AM EDTFlash Flood WarningFFCJasper, Jones, Putnam7 hr
Oct 6, 11:42 AM EDTSpecial Weather StatementFFCPike63 min
Oct 6, 12:18 PM EDTFlash Flood WarningFFCPike, Talbot, Upson6 hr
Oct 6, 12:56 PM EDTSpecial Weather StatementFFCUpson34 min
Oct 6, 1:23 PM EDTFlash Flood WarningFFCCrawford, Lamar, Pike, Taylor, Upson4 hr
Oct 6, 1:30 PM EDTFlash Flood WarningFFCMorgan, Putnam5 hr
Oct 6, 1:59 PM EDTRiver Flood WarningFFCPutnam5 hr
Oct 6, 2:19 PM EDTTornado WarningFFCMonroe26 min
Oct 6, 2:45 PM EDTSpecial Weather StatementFFCTreutlen30 min
Oct 6, 2:57 PM EDTFlash Flood WarningFFCBibb, Crawford, Monroe, Peach5 hr
Oct 6, 3:38 PM EDTSpecial Weather StatementFFCLaurens37 min
Oct 6, 6:13 PM EDTFlash Flood WarningFFCJasper, Putnam3 hr

Nearby

Flash Flood Warnings in Georgia, 2021Every flash flood warning in 2021

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.