Alert archive / Georgia / Flash Flood Warnings in 2020

Flash Flood Warning 21, NWS Atlanta, GA

April 19, 20208 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Apr 19, 2020, 7:23 PM EDT for 8 counties in Georgia. It was in force for 11 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: Apr 19, 2020, 7:23 PM EDT (23:23 UTC)
Expired: Apr 20, 2020, 6:17 AM EDT
In force: 11 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

Counties Crawford County, GA, Houston County, GA, Macon County, GA, Marion County, GA, Peach County, GA, Schley County, GA, Talbot County, GA, Taylor County, GA

The radar

The Robins AFB radar (KJGX), 57 km from the middle of the area, began a volume at 23:26 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
Apr 19, 10:00 PM EDT	FLASH FLOOD	1 Wnw Bonaire, GA	COUNTY RD AND GAIL RD IN BONAIRE ARE BOTH CLOSED DUE TO FLOODING.
Apr 19, 10:16 PM EDT	FLASH FLOOD	3 Nw Perry, GA	IVERNESS DR IN PERRY IS CLOSED DUE TO WATER OVER THE ROADWAY. PERRY PARKWAY NEAR AIRPORT RD ALSO HAS ONE LANE CLOSED DUE TO WATER OVER THE ROADWAY.

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, 11.4 hours before the alert went out and 101 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: 1440 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

485 
WGUS52 KFFC 192323
FFWFFC
GAC079-153-193-197-225-249-263-269-200515-
/O.NEW.KFFC.FF.W.0021.200419T2323Z-200420T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
723 PM EDT Sun Apr 19 2020

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Macon County in west central Georgia...
  East central Marion County in west central Georgia...
  Peach County in central Georgia...
  Houston County in central Georgia...
  Crawford County in central Georgia...
  Schley County in west central Georgia...
  Southeastern Talbot County in west central Georgia...
  Taylor County in west central Georgia...

* Until 115 AM EDT.

* At 721 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Rainfall amounts of 2 to 3.5 
  inches have already fallen today, and an additional 1 to 3 inches 
  are possible over the next several hours. Flash flooding is 
  ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  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 flooding include...
  Perry, Fort Valley, Butler, Ellaville, Oglethorpe, Roberta, Warner
  Robins, Centerville, Byron, Montezuma, Marshallville, Reynolds,
  Ideal, Robins Air Force Base, Putnam, Hayneville, Houston Lake,
  Clearview, Howard and Moss Oak.

Additional rainfall amounts of 1 to 3 inches are possible in the 
warned area through 1 AM EDT. Locally higher amounts are possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3276 8441 3276 8430 3272 8426 3274 8424
      3272 8424 3269 8420 3276 8417 3276 8383
      3273 8381 3272 8376 3269 8374 3265 8355
      3253 8354 3249 8350 3240 8349 3239 8353
      3229 8362 3229 8390 3224 8397 3222 8443

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

2 follow-up statements

320 
WGUS52 KFFC 200423
FFWFFC
GAC079-153-193-197-225-249-263-269-201115-
/O.EXT.KFFC.FF.W.0021.000000T0000Z-200420T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
1223 AM EDT Mon Apr 20 2020

The National Weather Service in Peachtree City has extended the

* Flash Flood Warning for...
  Macon County in west central Georgia...
  East central Marion County in west central Georgia...
  Peach County in central Georgia...
  Houston County in central Georgia...
  Crawford County in central Georgia...
  Schley County in west central Georgia...
  Southeastern Talbot County in west central Georgia...
  Taylor County in west central Georgia...

* Until 715 AM EDT Monday.

* At 1222 AM EDT, the public reported thunderstorms producing heavy 
  rain across the warned area. 3 to 6.5 inches of rain have fallen. 
  Flash flooding is already occurring.

  HAZARD...Life threatening flash flooding. Heavy rain producing 
           flash flooding.

  SOURCE...Public.

  IMPACT...Life threatening flash flooding of creeks and streams, 
           urban areas, highways, streets and underpasses.

Additional rainfall amounts of 2 to 3 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.

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

&&

LAT...LON 3276 8441 3276 8430 3272 8426 3274 8424
      3272 8424 3269 8420 3276 8417 3276 8383
      3273 8381 3272 8376 3269 8374 3265 8355
      3253 8354 3249 8350 3240 8349 3239 8353
      3229 8362 3229 8390 3224 8397 3222 8443

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

887 
WGUS72 KFFC 201017
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
617 AM EDT Mon Apr 20 2020

GAC079-153-193-197-225-249-263-269-201027-
/O.CAN.KFFC.FF.W.0021.000000T0000Z-200420T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Macon GA-Marion GA-Peach GA-Houston GA-Crawford GA-Schley GA-
Talbot GA-Taylor GA-
617 AM EDT Mon Apr 20 2020

...THE FLASH FLOOD WARNING FOR MACON...EAST CENTRAL MARION...PEACH...
HOUSTON...CRAWFORD...SCHLEY...SOUTHEASTERN TALBOT AND TAYLOR COUNTIES
IS CANCELLED...

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

LAT...LON 3276 8441 3276 8430 3272 8426 3274 8424
      3272 8424 3269 8420 3276 8417 3276 8383
      3273 8381 3272 8376 3269 8374 3265 8355
      3253 8354 3249 8350 3240 8349 3239 8353
      3229 8362 3229 8390 3224 8397 3222 8443

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 7:28 AM EDT	Special Weather Statement	FFC	Coweta, Heard, Troup	32 min
Apr 19, 7:58 AM EDT	Special Weather Statement	FFC	Clayton, Coweta, Fayette, Henry, Spalding	47 min
Apr 19, 8:52 AM EDT	Special Weather Statement	FFC	Harris, Troup	38 min
Apr 19, 8:58 AM EDT	Special Weather Statement	FFC	Jasper, Morgan, Putnam	32 min
Apr 19, 9:03 AM EDT	Special Weather Statement	FFC	Baldwin, Washington	27 min
Apr 19, 9:08 AM EDT	Special Weather Statement	FFC	Chattahoochee, Marion	52 min
Apr 19, 9:28 AM EDT	Special Weather Statement	FFC	Webster	47 min
Apr 19, 9:30 AM EDT	Special Weather Statement	FFC	Wilkinson	45 min
Apr 19, 10:02 AM EDT	Special Weather Statement	FFC	Sumter	28 min
Apr 19, 10:29 AM EDT	Special Weather Statement	FFC	Crisp	31 min
Apr 19, 10:48 AM EDT	Special Weather Statement	FFC	Macon, Schley	42 min
Apr 19, 10:53 AM EDT	Severe Thunderstorm Warning	FFC	Macon, Schley, Taylor	37 min
Apr 19, 11:05 AM EDT	Special Weather Statement	FFC	Dodge	25 min
Apr 19, 11:14 AM EDT	Special Weather Statement	FFC	Telfair	31 min
Apr 19, 11:16 AM EDT	Severe Thunderstorm Warning	FFC	Dooly, Houston, Macon, Pulaski	29 min
Apr 19, 11:32 AM EDT	Special Weather Statement	FFC	Dodge, Wheeler	28 min
Apr 19, 11:41 AM EDT	Severe Thunderstorm Warning	FFC	Bleckley, Dodge, Laurens, Pulaski	34 min
Apr 19, 11:51 AM EDT	Special Weather Statement	FFC	Houston	24 min
Apr 19, 12:06 PM EDT	Severe Thunderstorm Warning	FFC	Dodge, Laurens, Montgomery, Treutlen, Wheeler	24 min
Apr 19, 12:15 PM EDT	Special Weather Statement	FFC	Bleckley, Pulaski	30 min
Apr 19, 12:30 PM EDT	Special Weather Statement	FFC	Montgomery, Toombs	30 min
Apr 19, 1:34 PM EDT	Special Weather Statement	FFC	Bleckley, Laurens	26 min
Apr 19, 2:00 PM EDT	Special Weather Statement	FFC	Laurens, Treutlen	30 min
Apr 19, 2:06 PM EDT	Special Weather Statement	FFC	Stewart, Webster	24 min
Apr 19, 2:36 PM EDT	Special Weather Statement	FFC	Webster	24 min
Apr 19, 2:58 PM EDT	Special Weather Statement	FFC	Dooly, Sumter	32 min
Apr 19, 6:38 PM EDT	Flash Flood Warning	FFC	Chattahoochee, Harris, Marion, Muscogee, Stewart, Talbot and 1 more	12 hr
Apr 19, 6:42 PM EDT	Special Weather Statement	FFC	Harris	33 min
Apr 19, 7:15 PM EDT	Special Weather Statement	FFC	Crawford, Harris, Muscogee, Talbot, Taylor	30 min

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.