Alert archive / Georgia / Flash Flood Warnings in 2021

Flash Flood Warning 18, NWS Tallahassee, FL

July 15, 20216 counties in Georgia

NWS Tallahassee, FL issued this flash flood warning at Jul 15, 2021, 5:48 PM EDT for 6 counties in Georgia. It was in force for 117 min. 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: Jul 15, 2021, 5:48 PM EDT (21:48 UTC)
Expired: Jul 15, 2021, 7:45 PM EDT
In force: 117 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Flood severity: None

Counties Baker County, GA, Decatur County, GA, Early County, GA, Miller County, GA, Mitchell County, GA, Seminole County, GA

The radar

The Ft Rucker radar (KEOX), 69 km from the middle of the area, began a volume at 21:48 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
Jul 15, 6:10 PM EDT	FLASH FLOOD	Donalsonville, GA
Jul 15, 6:44 PM EDT	FLASH FLOOD	Colquitt, GA	ROADS CLOSED DUE TO FLOODING IN THE COLQUITT AREA.

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

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 9.8 hours before the alert went out and 93 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: 977 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 911 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

964 
WGUS52 KTAE 152148
FFWTAE
GAC007-087-099-201-205-253-152345-
/O.NEW.KTAE.FF.W.0018.210715T2148Z-210715T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tallahassee FL
548 PM EDT Thu Jul 15 2021

The National Weather Service in Tallahassee has issued a

* Flash Flood Warning for...
  Southwestern Baker County in southwestern Georgia...
  Eastern Decatur County in southwestern Georgia...
  South Central Early County in southwestern Georgia...
  Miller County in southwestern Georgia...
  Southwestern Mitchell County in southwestern Georgia...
  Northeastern Seminole County in southwestern Georgia...

* Until 745 PM EDT.

* At 548 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across 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...
  Colquitt, Donalsonville, Iron City, Brinson, Jakin, Boykin, 
  Babcock, Eldorendo, Ausmac, Bellview, Cyrene, Decatur Co A/P, 
  Enterprise, Harmony Church Rd/hwy 45, Sharphagen, Jeterville, 
  Steinham Store, Cooktown, Davis Park and Lela.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3112 8505 3125 8476 3119 8430 3096 8445
      3093 8497 3094 8498 3096 8498 3097 8498
      3098 8501 3101 8500 3103 8501 3105 8501
      3107 8503 3108 8503 3111 8504

FLASH FLOOD...RADAR INDICATED

$$

42-DVD

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 15, 2:18 PM EDT	Special Weather Statement	TAE	Clay	27 min
Jul 15, 3:29 PM EDT	Special Weather Statement	TAE	Turner	46 min
Jul 15, 3:36 PM EDT	Severe Thunderstorm Warning	TAE	Turner	39 min
Jul 15, 3:41 PM EDT	Special Weather Statement	TAE	Early	34 min
Jul 15, 4:12 PM EDT	Special Weather Statement	TAE	Worth	33 min
Jul 15, 4:12 PM EDT	Special Weather Statement	TAE	Worth	33 min
Jul 15, 4:18 PM EDT	Special Weather Statement	TAE	Calhoun, Early	42 min
Jul 15, 4:35 PM EDT	Special Weather Statement	TAE	Mitchell	40 min
Jul 15, 5:01 PM EDT	Special Weather Statement	TAE	Miller, Mitchell	44 min
Jul 15, 5:04 PM EDT	Areal Flood Advisory	TAE	Worth	56 min
Jul 15, 5:23 PM EDT	Areal Flood Advisory	TAE	Baker, Decatur, Early, Miller, Mitchell, Seminole	112 min
Jul 15, 5:57 PM EDT	Special Weather Statement	TAE	Colquitt, Thomas	48 min
Jul 15, 6:08 PM EDT	Severe Thunderstorm Warning	TAE	Decatur, Seminole	21 min
Jul 15, 6:49 PM EDT	Special Weather Statement	TAE	Grady	41 min
Jul 15, 7:32 PM EDT	Areal Flood Advisory	TAE	Grady	118 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.