Alert archive / Georgia / Flash Flood Warnings in 2019

Flash Flood Warning 30, NWS Atlanta, GA

August 23, 2019Dawson County, Pickens County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 23, 2019, 5:01 PM EDT for Dawson County, Pickens County, Georgia. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 23, 2019, 5:01 PM EDT (21:01 UTC)
Expired
Aug 23, 2019, 6:02 PM EDT
In force
61 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Dawson County, GA, Pickens County, GA

The radar

The Atlanta radar (KFFC), 132 km from the middle of the area, began a volume at 21:05 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.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.0 hours before the alert went out and 130 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 2019-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 894 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 2019-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 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
894 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
959 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-22 m²/s²
0-3 km storm-relative helicity
-11 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

383 
WGUS52 KFFC 232101
FFWFFC
GAC085-227-240300-
/O.NEW.KFFC.FF.W.0030.190823T2101Z-190824T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
501 PM EDT Fri Aug 23 2019

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Western Dawson County in north central Georgia...
  East central Pickens County in north central Georgia...

* Until 1100 PM EDT.

* At 501 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to two and a half inches of 
  rain have already fallen. Flash flooding is expected to begin 
  shortly.

* Some locations that will experience flooding include...
  Amicalola Falls State Park, Juno and Fausett Lake. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3457 8419 3454 8419 3450 8415 3438 8413
      3442 8432 3451 8434 3460 8422

$$
1 follow-up statement
675 
WGUS72 KFFC 232202
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
602 PM EDT Fri Aug 23 2019

GAC085-227-232211-
/O.CAN.KFFC.FF.W.0030.000000T0000Z-190824T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dawson GA-Pickens GA-
602 PM EDT Fri Aug 23 2019

...THE FLASH FLOOD WARNING FOR WESTERN DAWSON AND EAST CENTRAL
PICKENS 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 3457 8419 3454 8419 3450 8415 3438 8413
      3442 8432 3451 8434 3460 8422

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 22, 9:16 PM EDTSpecial Weather StatementFFCSumter29 min
Aug 23, 1:56 PM EDTSpecial Weather StatementFFCLumpkin, White49 min
Aug 23, 3:06 PM EDTSpecial Weather StatementFFCPaulding39 min
Aug 23, 3:14 PM EDTSevere Thunderstorm WarningFFCBartow, Floyd, Gordon46 min
Aug 23, 3:48 PM EDTSevere Thunderstorm WarningFFCCatoosa, Walker, Whitfield42 min
Aug 23, 4:03 PM EDTSpecial Weather StatementFFCWarren27 min
Aug 23, 4:15 PM EDTSpecial Weather StatementFFCDawson, Lumpkin, Pickens30 min
Aug 23, 5:25 PM EDTSpecial Weather StatementFFCTaliaferro50 min
Aug 23, 5:37 PM EDTSpecial Weather StatementFFCUnion23 min
Aug 23, 5:53 PM EDTSevere Thunderstorm WarningFFCWilkes37 min
Aug 23, 6:09 PM EDTSpecial Weather StatementFFCBarrow, Clarke, Jackson, Madison, Oconee, Oglethorpe51 min
Aug 23, 6:18 PM EDTSevere Thunderstorm WarningFFCGreene, Morgan, Oconee, Oglethorpe42 min
Aug 23, 6:25 PM EDTSpecial Weather StatementFFCHancock35 min
Aug 23, 6:28 PM EDTFlash Flood WarningFFCTaliaferro6 hr
Aug 23, 6:36 PM EDTSevere Thunderstorm WarningFFCClarke, Jackson, Madison, Oconee, Oglethorpe39 min
Aug 23, 7:05 PM EDTSevere Thunderstorm WarningFFCJefferson, Washington40 min
Aug 23, 7:14 PM EDTSevere Thunderstorm WarningFFCGlascock, Jefferson, Warren, Washington31 min
Aug 23, 7:18 PM EDTSevere Thunderstorm WarningFFCWashington27 min
Aug 23, 7:30 PM EDTSpecial Weather StatementFFCJohnson45 min
Aug 23, 7:32 PM EDTSpecial Weather StatementFFCGreene28 min
Aug 23, 7:45 PM EDTSpecial Weather StatementFFCGlascock, Jefferson30 min

Nearby

Flash Flood Warnings in Georgia, 2019Every flash flood warning in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.