Alert archive / Georgia / Flash Flood Warnings in 2022

Flash Flood Warning 19, NWS Atlanta, GA

July 30, 2022Floyd County, Polk County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 30, 2022, 6:58 PM EDT for Floyd County, Polk County, Georgia. It was in force for 6 hr. 1 report 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 30, 2022, 6:58 PM EDT (22:58 UTC)
Expired
Jul 31, 2022, 1:00 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Floyd County, GA, Polk County, GA

The radar

The Atlanta radar (KFFC), 112 km from the middle of the area, began a volume at 23:00 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
Jul 30, 7:32 PM EDTFLASH FLOODCave Spring, GASTANDING WATER IN DOWNTOWN CAVE SPRING.

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, 11.0 hours before the alert went out and 115 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 2022-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1594 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 2022-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
1594 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
864 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
26 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

339 
WGUS52 KFFC 302258
FFWFFC
GAC115-233-310500-
/O.NEW.KFFC.FF.W.0019.220730T2258Z-220731T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
658 PM EDT Sat Jul 30 2022

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Southwestern Floyd County in northwestern Georgia...
  Northwestern Polk County in northwestern Georgia...

* Until 100 AM EDT Sunday.

* At 658 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 2.5 inches of 
  rain have fallen. Additional rainfall of 1 to 2 inches is 
  possible. 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...
  Cave Spring.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3415 8543 3420 8534 3419 8521 3410 8522
      3408 8522 3401 8541 3406 8542 3407 8542
      3408 8542 3411 8543 3413 8543 3414 8543

FLASH FLOOD...RADAR INDICATED

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 29, 8:06 PM EDTSpecial Weather StatementFFCTroup24 min
Jul 29, 9:00 PM EDTSpecial Weather StatementFFCChattooga45 min
Jul 29, 10:01 PM EDTSpecial Weather StatementFFCFloyd29 min
Jul 29, 10:47 PM EDTSpecial Weather StatementFFCFloyd43 min
Jul 30, 1:25 AM EDTSpecial Weather StatementFFCGreene35 min
Jul 30, 1:55 AM EDTSpecial Weather StatementFFCDeKalb35 min
Jul 30, 2:02 AM EDTSpecial Weather StatementFFCWalton28 min
Jul 30, 2:26 AM EDTFlash Flood WarningFFCDeKalb, Fulton, Gwinnett4 hr
Jul 30, 2:31 AM EDTSpecial Weather StatementFFCHenry, Rockdale, Walton29 min
Jul 30, 2:49 PM EDTSpecial Weather StatementFFCHenry26 min
Jul 30, 3:07 PM EDTSpecial Weather StatementFFCRockdale38 min
Jul 30, 3:40 PM EDTSpecial Weather StatementFFCWarren35 min
Jul 30, 3:47 PM EDTSpecial Weather StatementFFCCoweta28 min
Jul 30, 3:56 PM EDTSpecial Weather StatementFFCDeKalb34 min
Jul 30, 3:59 PM EDTSpecial Weather StatementFFCPutnam31 min
Jul 30, 4:08 PM EDTSpecial Weather StatementFFCFulton37 min
Jul 30, 4:28 PM EDTSpecial Weather StatementFFCGreene32 min
Jul 30, 4:46 PM EDTSpecial Weather StatementFFCCobb, DeKalb, Douglas, Fulton, Gwinnett44 min
Jul 30, 4:52 PM EDTSpecial Weather StatementFFCBarrow23 min
Jul 30, 5:20 PM EDTSevere Thunderstorm WarningFFCClarke, Madison, Oglethorpe40 min
Jul 30, 6:00 PM EDTSpecial Weather StatementFFCOglethorpe30 min
Jul 30, 6:07 PM EDTSpecial Weather StatementFFCFloyd23 min
Jul 30, 6:17 PM EDTSpecial Weather StatementFFCMadison28 min
Jul 30, 6:21 PM EDTSpecial Weather StatementFFCBanks24 min
Jul 30, 6:22 PM EDTSpecial Weather StatementFFCBanks38 min

Nearby

Flash Flood Warnings in Georgia, 2022Every flash flood warning in 2022

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.