Alert archive / Georgia / Flash Flood Warnings in 2021

Flash Flood Warning 25, NWS Atlanta, GA

August 19, 2021Polk County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 19, 2021, 3:33 PM EDT for Polk County, Georgia. It was in force for 3 hr. 10 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
Aug 19, 2021, 3:33 PM EDT (19:33 UTC)
Expired
Aug 19, 2021, 6:30 PM EDT
In force
3 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

County Polk County, GA

The radar

The Atlanta radar (KFFC), 88 km from the middle of the area, began a volume at 19:37 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
Aug 19, 3:39 PM EDTFLASH FLOOD2 Nw Fish Creek, GAA POND DAM WASHED OUT ON RICHARD PULLEN ROAD WASHING OUT THE ROADWAY
Aug 19, 3:57 PM EDTFLASH FLOOD3 Nw Fish Creek, GAWATER WAS UP TO THE MAILBOXES IN THE 700 BLOCK OF FISH CREEK ROAD
Aug 19, 4:27 PM EDTFLASH FLOOD3 Sw Cedartown, GAHIGH WATER CLOSED THE ROAD AROUND THE INTERSECTION OF JUDKIN MILL ROAD AND JOHNSON LAKE ROAD
Aug 19, 5:00 PM EDTFLASH FLOOD2 W Van Wert, GAPART OF THE ROAD WAS WASHED AWAY ON MORGAN VALLEY ROAD AT HILLSIDE DRIVE
Aug 19, 5:05 PM EDTFLASH FLOOD3 Nw Fish Creek, GAWATER OVER VEHICLES AT COLLARD VALLEY ROAD AND FISH CREEK ROAD
Aug 19, 5:10 PM EDTFLASH FLOOD3 E Cedartown, GAVEHICLES FLOODED IN THE PARKING LOT OF THE POLK COUNTY MEDICAL CENTER
Aug 19, 5:12 PM EDTFLASH FLOOD5 Ese Esom Hill, GAROAD WASHED AWAY AROUND THE INTERSECTION OF CULP LAKE ROAD AND FULLMER SPRING/JOHNSON LAKE ROAD
Aug 19, 5:17 PM EDTFLASH FLOOD1 Nne Fish Creek, GAHIGH WATER CLOSED THE ROAD AT BELLVIEW ROAD AND ANDERSON ROAD
Aug 19, 5:44 PM EDTFLASH FLOOD2 Nw Fish Creek, GACULVERT WASHED OUT ON DAVID PRICE ROAD
Aug 19, 6:09 PM EDTFLASH FLOOD2 Ese Cedartown, GAROAD WASHED OUT AT JLG ROAD AND HUTTO ROAD

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, 7.6 hours before the alert went out and 91 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 2021-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 603 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°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 2021-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.1939Sfc1 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
603 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
921 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
13 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

573 
WGUS52 KFFC 191933
FFWFFC
GAC233-192230-
/O.NEW.KFFC.FF.W.0025.210819T1933Z-210819T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
333 PM EDT Thu Aug 19 2021

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Polk County in northwestern Georgia...

* Until 630 PM EDT.

* At 333 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. The expected rainfall rate is 1.5 to 2 inches in 1 
  hour. Additional rainfall amounts up to 1 inch 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...
  Cedartown, Rockmart, Tallapoosa, Aragon, Antioch, Fish Creek, Van 
  Wert, Esom Hill and Etna.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3403 8541 3408 8505 3408 8492 3395 8498
      3395 8505 3393 8506 3391 8513 3390 8539

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1.5-2 INCHES IN 1 HOUR

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 8:13 PM EDTRiver Flood WarningFFCBibb, Houston, Jones, Monroe, Twiggs16 hr
Aug 19, 1:54 PM EDTSpecial Weather StatementFFCBartow36 min
Aug 19, 2:21 PM EDTSpecial Weather StatementFFCTwiggs24 min
Aug 19, 2:23 PM EDTSpecial Weather StatementFFCWhite22 min
Aug 19, 2:32 PM EDTSpecial Weather StatementFFCHaralson28 min
Aug 19, 3:07 PM EDTSpecial Weather StatementFFCPolk23 min
Aug 19, 3:12 PM EDTSpecial Weather StatementFFCHall33 min
Aug 19, 3:24 PM EDTSpecial Weather StatementFFCFulton36 min
Aug 19, 3:38 PM EDTSpecial Weather StatementFFCBanks22 min
Aug 19, 4:04 PM EDTSpecial Weather StatementFFCDeKalb, Gwinnett26 min
Aug 19, 4:35 PM EDTSpecial Weather StatementFFCGwinnett25 min
Aug 19, 4:41 PM EDTRiver Flood WarningFFCPolk6 hr
Aug 19, 5:01 PM EDTSpecial Weather StatementFFCBarrow, Walton29 min
Aug 19, 5:04 PM EDTSpecial Weather StatementFFCJasper, Newton26 min
Aug 19, 5:13 PM EDTSpecial Weather StatementFFCMeriwether32 min
Aug 19, 5:32 PM EDTRiver Flood WarningFFCGwinnett112 min
Aug 19, 5:36 PM EDTSpecial Weather StatementFFCMorgan24 min
Aug 19, 6:11 PM EDTSpecial Weather StatementFFCUpson34 min

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.