Alert archive / Georgia / Flash Flood Warnings in 2021

Flash Flood Warning 8, NWS Atlanta, GA

March 31, 202113 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Mar 31, 2021, 8:16 AM EDT for 13 counties in Georgia. It was in force for 6 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: Mar 31, 2021, 8:16 AM EDT (12:16 UTC)
Expired: Mar 31, 2021, 2:00 PM EDT
In force: 6 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

Counties Bartow County, GA, Chattooga County, GA, Fannin County, GA, Floyd County, GA, Gilmer County, GA, Gordon County, GA, Murray County, GA, Pickens County, GA, Polk County, GA, Towns County, GA, Union County, GA, Walker County, GA, Whitfield County, GA

The radar

The Atlanta radar (KFFC), 133 km from the middle of the area, began a volume at 12:16 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
Mar 31, 8:18 AM EDT	FLASH FLOOD	3 S Varnell, GA	A WATER RESCUE WAS REPORTED NEAR THE INTERSECTION OF WARING RD AND SCARLET DR.
Mar 31, 8:30 AM EDT	FLASH FLOOD	2 Nw Ellijay, GA	ROAD CLOSED DUE TO FLOODING NEAR THE INTERSECTION OF CHATSWORTH HWY AND SANFORD LN.
Mar 31, 8:30 AM EDT	FLASH FLOOD	3 E Dalton, GA	WATER RESCUE PERFORMED NEAR THE INTERSECTION OF OLD GRADE ADN BYPASS CLOSE TO JEFF ROAD.
Mar 31, 8:43 AM EDT	FLASH FLOOD	2 Nnw Dalton, GA	NUMEROUS REPORTS OF CLOSED ROADS DUE TO FLASH FLOODING THROUGHOUT THE COUNTY.

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, 0.3 hours before the alert went out and 133 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: 111 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 562 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 205 m²/s²
0-3 km storm-relative helicity: 296 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

078 
WGUS52 KFFC 311216
FFWFFC
GAC015-055-111-115-123-129-213-227-233-281-291-295-313-311815-
/O.NEW.KFFC.FF.W.0008.210331T1216Z-210331T1815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
816 AM EDT Wed Mar 31 2021

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Fannin County in north central Georgia...
  Gilmer County in north central Georgia...
  Pickens County in north central Georgia...
  Union County in north central Georgia...
  Towns County in northeastern Georgia...
  Bartow County in northwestern Georgia...
  Chattooga County in northwestern Georgia...
  Floyd County in northwestern Georgia...
  Gordon County in northwestern Georgia...
  Murray County in northwestern Georgia...
  Polk County in northwestern Georgia...
  Southeastern Walker County in northwestern Georgia...
  Whitfield County in northwestern Georgia...

* Until 215 PM EDT.

* At 816 AM EDT, local law enforcement reported thunderstorms 
  producing heavy rain across the warned area. Up to 1 inch of rain 
  has fallen. Flash flooding is already occurring.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Law enforcement.

  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...
  Rome, Dalton, Cartersville, Calhoun, Cedartown, Summerville, 
  Chatsworth, Jasper, Ellijay, Blue Ridge, Hiawassee, Blairsville, 
  Adairsville, Rockmart, Euharlee, Tallapoosa, Trion, Varnell, 
  Emerson and Nelson.

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 3458 8552 3472 8517 3482 8513 3488 8501
      3499 8498 3499 8355 3481 8367 3478 8382
      3472 8384 3474 8395 3464 8404 3465 8413
      3458 8434 3438 8426 3440 8465 3408 8466
      3408 8492 3390 8505 3390 8539

FLASH FLOOD...OBSERVED

$$

1 follow-up statement

074 
WGUS72 KFFC 311800
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
200 PM EDT Wed Mar 31 2021

GAC015-055-111-115-123-129-213-227-233-281-291-295-313-311810-
/O.CAN.KFFC.FF.W.0008.000000T0000Z-210331T1815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bartow GA-Chattooga GA-Fannin GA-Floyd GA-Gilmer GA-Gordon GA-Murray
GA-Pickens GA-Polk GA-Towns GA-Union GA-Walker GA-Whitfield GA-
200 PM EDT Wed Mar 31 2021

...FLASH FLOOD WARNING IS CANCELLED FOR FANNIN, GILMER, PICKENS, 
UNION, TOWNS, BARTOW, CHATTOOGA, FLOYD, GORDON, MURRAY, POLK, 
SOUTHEASTERN WALKER AND WHITFIELD COUNTIES...

The heavy rain has ended. River flooding will continue to pose a 
threat to some areas. Please continue to heed remaining road 
closures.

The Flash Flood Watch has been cancelled. 

LAT...LON 3458 8552 3472 8517 3482 8513 3488 8501
      3499 8498 3499 8355 3481 8367 3478 8382
      3472 8384 3474 8395 3464 8404 3465 8413
      3458 8434 3438 8426 3440 8465 3408 8466
      3408 8492 3390 8505 3390 8539

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 7:04 AM EDT	Special Weather Statement	FFC	Catoosa, Chattooga, Dade, Walker	41 min
Mar 31, 7:46 AM EDT	Flash Flood Warning	FFC	Catoosa, Dade, Walker	5 hr
Mar 31, 8:19 AM EDT	Special Weather Statement	FFC	Paulding	26 min
Mar 31, 9:07 AM EDT	River Flood Warning	FFC	Dade	29 hr
Mar 31, 9:08 AM EDT	River Flood Warning	FFC	Whitfield	5 hr
Mar 31, 9:09 AM EDT	Special Weather Statement	FFC	Cobb, Douglas, Fulton	36 min
Mar 31, 9:15 AM EDT	River Flood Warning	FFC	Chattooga	27 hr
Mar 31, 9:15 AM EDT	River Flood Warning	FFC	Floyd	45 hr
Mar 31, 9:15 AM EDT	River Flood Warning	FFC	Gordon, Murray, Whitfield	4 days
Mar 31, 9:15 AM EDT	River Flood Warning	FFC	Floyd, Gordon	4 days
Mar 31, 9:23 AM EDT	River Flood Warning	FFC	Catoosa	49 hr
Mar 31, 9:38 AM EDT	Special Weather Statement	FFC	Gwinnett	37 min
Mar 31, 9:44 AM EDT	River Flood Warning	FFC	Whitfield	71 hr
Mar 31, 9:53 AM EDT	Special Weather Statement	FFC	Douglas, Fulton	22 min
Mar 31, 9:54 AM EDT	River Flood Warning	FFC	Murray, Whitfield	44 hr
Mar 31, 11:26 AM EDT	Special Weather Statement	FFC	Haralson, Paulding	34 min
Mar 31, 11:58 AM EDT	Special Weather Statement	FFC	Carroll, Cobb, Douglas	32 min
Mar 31, 1:12 PM EDT	Special Weather Statement	FFC	Fayette	33 min
Mar 31, 1:31 PM EDT	River Flood Warning	FFC	Cobb	21 days
Mar 31, 2:00 PM EDT	River Flood Warning	FFC	Catoosa	19 hr
Mar 31, 2:21 PM EDT	River Flood Warning	FFC	Forsyth, Fulton	21 hr
Mar 31, 3:00 PM EDT	Special Weather Statement	FFC	Oglethorpe	30 min
Mar 31, 3:03 PM EDT	Special Weather Statement	FFC	Greene	27 min
Mar 31, 3:44 PM EDT	Special Weather Statement	FFC	Chattahoochee, Marion, Stewart	31 min
Mar 31, 3:59 PM EDT	Special Weather Statement	FFC	Wilkes	31 min
Mar 31, 4:22 PM EDT	Freeze Watch	FFC	Banks, Barrow, Bartow, Butts, Carroll, Catoosa and 44 more	11 hr
Mar 31, 4:22 PM EDT	Wind Advisory	FFC	Banks, Barrow, Bartow, Bibb, Butts, Carroll and 64 more	27 hr
Mar 31, 5:08 PM EDT	Special Weather Statement	FFC	Bleckley, Dooly, Houston, Pulaski, Twiggs, Wilkinson	37 min
Mar 31, 5:23 PM EDT	Special Weather Statement	FFC	Glascock, Washington	37 min
Mar 31, 5:35 PM EDT	Special Weather Statement	FFC	Bleckley, Dodge, Pulaski, Wilcox	25 min
Mar 31, 5:44 PM EDT	Severe Thunderstorm Warning	FFC	Laurens	31 min
Mar 31, 6:05 PM EDT	Special Weather Statement	FFC	Emanuel, Treutlen, Wheeler	25 min
Mar 31, 6:22 PM EDT	River Flood Warning	FFC	Murray	7 hr
Mar 31, 6:30 PM EDT	Special Weather Statement	FFC	Emanuel, Montgomery, Telfair, Treutlen, Wheeler	30 min
Mar 31, 7:00 PM EDT	Special Weather Statement	FFC	Emanuel, Montgomery, Telfair, Toombs	30 min

Nearby

Flash Flood Warnings in Georgia, 2021 Every 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.