Alert archive / Georgia / Flash Flood Warnings in 2020

Flash Flood Warning 5, NWS Atlanta, GA

January 13, 20204 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Jan 13, 2020, 8:59 AM EST for 4 counties in Georgia. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jan 13, 2020, 8:59 AM EST (13:59 UTC)
Expired
Jan 13, 2020, 12:17 PM EST
In force
3 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Greene County, GA, Oglethorpe County, GA, Taliaferro County, GA, Wilkes County, GA

The radar

The Greer radar (KGSP), 132 km from the middle of the area, began a volume at 13:58 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, 2.0 hours before the alert went out and 170 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 2020-01-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 56 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 2020-01-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 square meters per square second.19395878Sfc1 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
56 J/kg
Mixed-layer CIN
-108 J/kg
Mixed-layer LCL
445 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
142 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

385 
WGUS52 KFFC 131359
FFWFFC
GAC133-221-265-317-132000-
/O.NEW.KFFC.FF.W.0005.200113T1359Z-200113T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
859 AM EST Mon Jan 13 2020

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Northeastern Greene County in east central Georgia...
  Northern Taliaferro County in east central Georgia...
  Wilkes County in east central Georgia...
  Southern Oglethorpe County in northeastern Georgia...

* Until 300 PM EST Monday.

* At 857 AM EST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Rainfall amounts of 2 to 3 
  inches of rain have fallen since early this morning. Flash 
  flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flooding of small creeks and streams, urban areas, 
           highways, streets and underpasses as well as other 
           drainage and low lying areas.

* Some locations that will experience flooding include...
  Washington, Crawfordville, Union Point, Tignall, Woodville, Maxeys,
  Rayle, Stephens, Delhi, Newtown, Danburg, Lyneville, Carters Grove,
  Jacksons Crossroads, Ficklin, Mallorysville, Lundberg, Robinson,
  Norman and Metasville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3352 8303 3381 8320 3399 8265 3386 8261
      3387 8258 3387 8257 3384 8258 3383 8260
      3369 8251

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...UP TO 1 INCH IN 1 HOUR

$$
1 follow-up statement
649 
WGUS72 KFFC 131717 RRA
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
1217 PM EST Mon Jan 13 2020

GAC133-221-265-317-131727-
/O.CAN.KFFC.FF.W.0005.000000T0000Z-200113T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Greene GA-Taliaferro GA-Wilkes GA-Oglethorpe GA-
1217 PM EST Mon Jan 13 2020

...THE FLASH FLOOD WARNING FOR NORTHEASTERN GREENE...NORTHERN
TALIAFERRO...WILKES AND SOUTHERN OGLETHORPE COUNTIES IS CANCELLED...

The heavy rain has ended. Although small creeks and streams may 
still be responding to the rainfall, the threat of flash flooding 
has passed. Please continue to heed any remaining road closures.

LAT...LON 3352 8303 3381 8320 3399 8265 3386 8261
      3387 8258 3387 8257 3384 8258 3383 8260
      3369 8251

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 12, 10:07 PM ESTSpecial Weather StatementFFCHancock23 min
Jan 12, 11:10 PM ESTSpecial Weather StatementFFCLamar, Meriwether, Pike35 min
Jan 12, 11:44 PM ESTSpecial Weather StatementFFCLamar, Pike, Spalding46 min
Jan 13, 12:16 AM ESTSpecial Weather StatementFFCButts, Jasper44 min
Jan 13, 12:53 AM ESTSpecial Weather StatementFFCJasper, Morgan52 min
Jan 13, 1:34 AM ESTDense Fog AdvisoryFFCBleckley, Chattahoochee, Crisp, Dodge, Dooly, Emanuel and 16 more7 hr
Jan 13, 1:51 AM ESTSpecial Weather StatementFFCGreene, Taliaferro, Wilkes39 min
Jan 13, 2:41 AM ESTFlash Flood WarningFFCGreene, Taliaferro, Wilkes6 hr
Jan 13, 5:21 AM ESTSpecial Weather StatementFFCLamar, Upson39 min
Jan 13, 7:59 AM ESTFlash Flood WarningFFCCoweta, Fayette, Meriwether, Pike, Spalding, Troup4 hr
Jan 13, 10:12 AM ESTFlash Flood WatchFFCBanks, Barrow, Bartow, Butts, Carroll, Catoosa and 50 more36 hr
Jan 13, 10:29 AM ESTRiver Flood WarningFFCBaldwin, Washington, Wilkinson20 hr
Jan 13, 10:36 AM ESTRiver Flood WarningFFCFayette, Spalding70 hr
Jan 13, 2:23 PM ESTRiver Flood WarningFFCBibb, Houston, Jones, Monroe, Twiggs4 days
Jan 13, 2:23 PM ESTRiver Flood WarningFFCTaliaferro, Wilkes43 hr

Nearby

Flash Flood Warnings in Georgia, 2020Every flash flood warning in 2020

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.