Alert archive / Georgia / Flash Flood Warnings in 2018

Flash Flood Warning 31, NWS Atlanta, GA

July 31, 2018Wilkes County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 31, 2018, 5:31 PM EDT for Wilkes 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 31, 2018, 5:31 PM EDT (21:31 UTC)
Expired
Jul 31, 2018, 11:30 PM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

County Wilkes County, GA

The radar

The Greer radar (KGSP), 124 km from the middle of the area, began a volume at 21:33 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 31, 8:00 PM EDTFLASH FLOOD1 W Danburg, GAEMERGENCY MANAGEMENT REPORTED AREAS ALONG FLAT ROCK RD HAD AT LEAST 6 INCHES OF WATER RUNNING 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, 9.5 hours before the alert went out and 180 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 2018-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 735 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 2018-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 square meters per square second.193958Sfc1 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
735 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
581 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
52 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

771 
WGUS52 KFFC 312131
FFWFFC
GAC317-010330-
/O.NEW.KFFC.FF.W.0031.180731T2131Z-180801T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
531 PM EDT TUE JUL 31 2018

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Central Wilkes County in east central Georgia...

* Until 1130 PM EDT.

* At 531 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to three inches of rain have
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Washington, Tignall, Mallorysville, Newtown, Delhi, Norman,
  Danburg, Celeste, Metasville and Floral Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3369 8258 3369 8288 3394 8280 3395 8263
      3386 8261 3387 8258 3387 8257 3384 8258
      3383 8260 3376 8256

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 8:07 PM EDTSpecial Weather StatementFFCCherokee23 min
Jul 30, 8:17 PM EDTSpecial Weather StatementFFCJohnson28 min
Jul 30, 8:25 PM EDTSevere Thunderstorm WarningFFCEmanuel, Jefferson, Johnson, Washington35 min
Jul 31, 3:50 AM EDTFlash Flood WatchFFCBanks, Barrow, Bartow, Butts, Carroll, Catoosa and 56 more3 days
Jul 31, 12:49 PM EDTSpecial Weather StatementFFCBartow, Polk41 min
Jul 31, 1:13 PM EDTSpecial Weather StatementFFCMuscogee32 min
Jul 31, 1:32 PM EDTSpecial Weather StatementFFCCobb, Paulding, Polk28 min
Jul 31, 2:05 PM EDTSpecial Weather StatementFFCPolk40 min
Jul 31, 2:13 PM EDTFlash Flood WarningFFCPolk6 hr
Jul 31, 2:20 PM EDTSpecial Weather StatementFFCForsyth25 min
Jul 31, 2:30 PM EDTSpecial Weather StatementFFCStewart45 min
Jul 31, 2:37 PM EDTSpecial Weather StatementFFCClayton, Coweta, Fayette, Fulton38 min
Jul 31, 2:58 PM EDTSpecial Weather StatementFFCTroup32 min
Jul 31, 3:10 PM EDTSpecial Weather StatementFFCClayton, DeKalb, Fayette, Henry, Spalding50 min
Jul 31, 3:19 PM EDTSpecial Weather StatementFFCChattahoochee, Marion, Stewart, Taylor26 min
Jul 31, 3:22 PM EDTSpecial Weather StatementFFCGwinnett38 min
Jul 31, 3:27 PM EDTSpecial Weather StatementFFCWhitfield48 min
Jul 31, 3:38 PM EDTSpecial Weather StatementFFCDouglas52 min
Jul 31, 3:53 PM EDTSpecial Weather StatementFFCChattooga, Walker, Whitfield52 min
Jul 31, 3:56 PM EDTSpecial Weather StatementFFCHarris, Troup34 min
Jul 31, 3:59 PM EDTSpecial Weather StatementFFCWashington, Wilkinson31 min
Jul 31, 4:16 PM EDTSpecial Weather StatementFFCDouglas29 min
Jul 31, 4:19 PM EDTSpecial Weather StatementFFCBanks, Barrow, Gwinnett, Jackson, Newton, Rockdale41 min
Jul 31, 4:22 PM EDTSpecial Weather StatementFFCCoweta, Fayette38 min
Jul 31, 4:31 PM EDTSpecial Weather StatementFFCCarroll, Heard44 min
Jul 31, 4:32 PM EDTSpecial Weather StatementFFCHancock, Johnson, Washington28 min
Jul 31, 4:36 PM EDTSpecial Weather StatementFFCWilkes24 min
Jul 31, 4:43 PM EDTSpecial Weather StatementFFCGordon47 min
Jul 31, 5:01 PM EDTSpecial Weather StatementFFCCarroll, Haralson44 min
Jul 31, 5:03 PM EDTSpecial Weather StatementFFCGlascock, Hancock, Warren27 min
Jul 31, 5:07 PM EDTSpecial Weather StatementFFCWilkes23 min
Jul 31, 5:26 PM EDTRiver Flood WarningFFCGwinnett3 hr
Jul 31, 5:30 PM EDTSpecial Weather StatementFFCGilmer45 min
Jul 31, 5:36 PM EDTSpecial Weather StatementFFCBleckley, Dodge, Laurens, Pulaski, Wilcox24 min
Jul 31, 5:46 PM EDTSpecial Weather StatementFFCTaliaferro, Warren29 min
Jul 31, 6:12 PM EDTSpecial Weather StatementFFCClarke, Madison, Morgan, Oconee48 min
Jul 31, 6:24 PM EDTRiver Flood WarningFFCGwinnett72 min

Nearby

Flash Flood Warnings in Georgia, 2018Every flash flood warning in 2018

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.