Alert archive / Georgia / Flash Flood Warnings in 2020

Flash Flood Warning 61, NWS Atlanta, GA

September 17, 2020Glascock County, Jefferson County, Warren County, Georgia

NWS Atlanta, GA issued this flash flood warning at Sep 17, 2020, 6:42 AM EDT for Glascock County, Jefferson County, Warren County, Georgia. It was in force for 6 hr. 2 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: Sep 17, 2020, 6:42 AM EDT (10:42 UTC)
Expired: Sep 17, 2020, 12:45 PM EDT
In force: 6 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

Counties Glascock County, GA, Jefferson County, GA, Warren County, GA

The radar

The Robins AFB radar (KJGX), 93 km from the middle of the area, began a volume at 10:45 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

Time	Report	Where	Remark
Sep 17, 8:00 AM EDT	FLASH FLOOD	1 Sse Wrens, GA	FLOOD WATERS MADE THEIR WAY INTO AN APARTMENT BUILDING IN WRENS, DISPLACING 6 FAMILIES.
Sep 17, 8:30 AM EDT	FLASH FLOOD	Avera, GA	ROAD WASHED OUT DUE TO HIGH WATER NEAR CLARKS MILL ROAD AND HWY 102/88. TIME ESTIMATED.

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, 10.7 hours before the alert went out and 183 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 540 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 263 m²/s²
0-3 km storm-relative helicity: 345 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

270 
WGUS52 KFFC 171042
FFWFFC
GAC125-163-301-171645-
/O.NEW.KFFC.FF.W.0061.200917T1042Z-200917T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
642 AM EDT Thu Sep 17 2020

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Glascock County in east central Georgia...
  Jefferson County in east central Georgia...
  Warren County in east central Georgia...

* Until 1245 PM EDT Thursday.

* At 642 AM EDT, Doppler radar indicated heavy rain in the warned 
  area. Between 1 and 2 inches of rain have fallen. Flash flooding 
  is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by heavy rain.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Louisville, Warrenton, Gibson, Wrens, Wadley, Stapleton, Bartow, 
  Avera, Norwood, Mitchell, Camak, Edge Hill, Edgehill, Stapletons 
  Crossroads, Bastonville, Grange, Reese, Stellaville, Agricola and 
  Matthews.

Additional rainfall amounts of 2 to 4 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.

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

&&

LAT...LON 3343 8282 3347 8287 3352 8282 3351 8275
      3359 8270 3361 8265 3335 8255 3331 8233
      3323 8223 3306 8229 3292 8228 3284 8232
      3281 8242 3277 8241 3276 8243 3282 8252
      3292 8251 3302 8255 3317 8274

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2-4 INCHES IN 3 HOURS 

$$

1 follow-up statement

126 
WGUS72 KFFC 171650
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
1250 PM EDT Thu Sep 17 2020

GAC125-163-301-171700-
/O.EXP.KFFC.FF.W.0061.000000T0000Z-200917T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Glascock GA-Jefferson GA-Warren GA-
1250 PM EDT Thu Sep 17 2020

...FLASH FLOOD WARNING HAS EXPIRED FOR GLASCOCK, JEFFERSON AND 
WARREN COUNTIES...

The heavy rain has ended. Flash flooding is no longer expected to 
pose a threat. Please continue to heed remaining road closures and 
do not drive around barricades.

LAT...LON 3343 8282 3347 8287 3352 8282 3351 8275
      3359 8270 3361 8265 3335 8255 3331 8233
      3323 8223 3306 8229 3292 8228 3284 8232
      3281 8242 3277 8241 3276 8243 3282 8252
      3292 8251 3302 8255 3317 8274

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 16, 9:10 PM EDT	Flash Flood Warning	FFC	Chattahoochee, Marion, Muscogee, Schley, Stewart, Sumter and 1 more	6 hr
Sep 16, 11:25 PM EDT	Flash Flood Warning	FFC	Crisp, Dooly, Macon, Taylor	7 hr
Sep 17, 12:00 AM EDT	Flash Flood Warning	FFC	Bibb, Bleckley, Crawford, Houston, Peach, Pulaski and 2 more	11 hr
Sep 17, 12:45 AM EDT	Flash Flood Warning	FFC	Harris, Lamar, Monroe, Pike, Talbot, Upson	7 hr
Sep 17, 1:13 AM EDT	Flash Flood Warning	FFC	Meriwether, Troup	5 hr
Sep 17, 2:49 AM EDT	Flash Flood Warning	FFC	Butts, Clayton, Coweta, Fayette, Fulton, Henry and 1 more	7 hr
Sep 17, 2:59 AM EDT	Flash Flood Warning	FFC	Baldwin, Jones, Wilkinson	8 hr
Sep 17, 3:29 AM EDT	Flash Flood Warning	FFC	Chattahoochee, Marion, Muscogee, Schley, Stewart, Sumter and 1 more	3 hr
Sep 17, 3:34 AM EDT	Flash Flood Warning	FFC	DeKalb, Gwinnett, Newton, Rockdale	6 hr
Sep 17, 3:39 AM EDT	Flash Flood Warning	FFC	Cobb, Douglas, Fulton	6 hr
Sep 17, 4:29 AM EDT	River Flood Warning	FFC	DeKalb, Fulton	8 hr
Sep 17, 4:32 AM EDT	River Flood Warning	FFC	DeKalb	11 hr
Sep 17, 4:32 AM EDT	River Flood Warning	FFC	DeKalb, Fulton	10 hr
Sep 17, 4:35 AM EDT	River Flood Warning	FFC	DeKalb	6 hr
Sep 17, 4:42 AM EDT	River Flood Warning	FFC	Fulton, Gwinnett	7 hr
Sep 17, 4:45 AM EDT	River Flood Warning	FFC	Fayette, Spalding	55 hr
Sep 17, 4:45 AM EDT	River Flood Warning	FFC	Crawford, Talbot, Taylor, Upson	28 hr
Sep 17, 4:45 AM EDT	River Flood Warning	FFC	Clayton, Fayette, Spalding	32 hr
Sep 17, 4:50 AM EDT	River Flood Warning	FFC	Chattahoochee, Muscogee	17 hr
Sep 17, 5:04 AM EDT	River Flood Warning	FFC	Lamar, Spalding	9 hr
Sep 17, 5:07 AM EDT	River Flood Warning	FFC	DeKalb, Rockdale	38 hr
Sep 17, 5:07 AM EDT	River Flood Warning	FFC	Forsyth, Fulton	43 hr
Sep 17, 5:07 AM EDT	River Flood Warning	FFC	Gwinnett	25 hr
Sep 17, 5:07 AM EDT	River Flood Warning	FFC	Newton, Rockdale	47 hr
Sep 17, 5:13 AM EDT	Flash Flood Warning	FFC	Hancock, Jasper, Putnam, Washington	6 hr
Sep 17, 5:16 AM EDT	River Flood Warning	FFC	Pulaski	6 hr
Sep 17, 5:16 AM EDT	River Flood Warning	FFC	Bibb, Houston, Jones, Monroe, Twiggs	4 days
Sep 17, 5:36 AM EDT	River Flood Warning	FFC	Gwinnett	5 hr
Sep 17, 5:39 AM EDT	River Flood Warning	FFC	Barrow, Jackson	34 hr
Sep 17, 5:39 AM EDT	River Flood Warning	FFC	Johnson, Washington, Wilkinson	5 days
Sep 17, 5:39 AM EDT	River Flood Warning	FFC	Baldwin, Washington, Wilkinson	39 hr
Sep 17, 5:39 AM EDT	River Flood Warning	FFC	Clarke, Greene, Oconee	64 hr
Sep 17, 5:43 AM EDT	River Flood Warning	FFC	DeKalb, Fulton	10 hr
Sep 17, 6:00 AM EDT	River Flood Warning	FFC	DeKalb	4 hr
Sep 17, 6:44 AM EDT	River Flood Warning	FFC	Cobb	4 hr
Sep 17, 6:51 AM EDT	River Flood Warning	FFC	Gwinnett, Walton	12 hr
Sep 17, 6:54 AM EDT	River Flood Warning	FFC	Gwinnett	11 hr
Sep 17, 6:58 AM EDT	River Flood Warning	FFC	Cobb	7 hr
Sep 17, 7:09 AM EDT	River Flood Warning	FFC	Forsyth	16 hr
Sep 17, 7:18 AM EDT	River Flood Warning	FFC	DeKalb, Fulton	118 min
Sep 17, 7:22 AM EDT	River Flood Warning	FFC	Cobb	7 hr
Sep 17, 7:27 AM EDT	River Flood Warning	FFC	Gwinnett	8 hr
Sep 17, 7:31 AM EDT	River Flood Warning	FFC	Fulton	12 hr
Sep 17, 7:47 AM EDT	Flash Flood Warning	FFC	Greene, Taliaferro	5 hr
Sep 17, 9:23 AM EDT	River Flood Warning	FFC	Cherokee, Cobb	5 hr
Sep 17, 9:28 AM EDT	River Flood Warning	FFC	Cobb, Fulton	16 hr
Sep 17, 10:31 AM EDT	River Flood Warning	FFC	Cobb, Fulton	13 hr
Sep 17, 10:31 AM EDT	River Flood Warning	FFC	Cobb, Fulton	11 hr
Sep 17, 10:31 AM EDT	River Flood Warning	FFC	Carroll, Coweta, Heard	12 hr
Sep 17, 11:03 AM EDT	River Flood Warning	FFC	Jefferson, Washington	23 hr
Sep 17, 11:23 AM EDT	River Flood Warning	FFC	Jones	15 hr
Sep 17, 1:31 PM EDT	River Flood Warning	FFC	Johnson, Laurens, Washington, Wilkinson	44 hr
Sep 17, 2:25 PM EDT	River Flood Warning	FFC	Newton, Rockdale	6 hr
Sep 17, 2:40 PM EDT	River Flood Warning	FFC	Taliaferro, Wilkes	33 hr
Sep 17, 2:44 PM EDT	River Flood Warning	FFC	Jefferson	3 hr
Sep 17, 3:32 PM EDT	River Flood Warning	FFC	Coweta, Fayette, Spalding	11 hr
Sep 17, 6:42 PM EDT	River Flood Warning	FFC	Elbert, Madison, Oglethorpe	3 hr
Sep 17, 7:22 PM EDT	River Flood Warning	FFC	Dooly	4 hr

Nearby

Flash Flood Warnings in Georgia, 2020 Every flash flood warning in 2020

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.