Alert archive / Georgia / Flash Flood Warnings in 2019

Flash Flood Warning 26, NWS Atlanta, GA

August 1, 2019Banks County, Jackson County, Madison County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 1, 2019, 9:57 PM EDT for Banks County, Jackson County, Madison County, Georgia. It was in force for 6 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
Aug 1, 2019, 9:57 PM EDT (01:57 UTC)
Expired
Aug 2, 2019, 4:00 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Banks County, GA, Jackson County, GA, Madison County, GA

The radar

The Greer radar (KGSP), 123 km from the middle of the area, began a volume at 01:59 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 00:00Z, 2.0 hours before the alert went out and 146 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 00:00Z on 2019-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 559 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 00:00Z on 2019-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
559 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
1622 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
3 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

736 
WGUS52 KFFC 020157
FFWFFC
GAC011-157-195-020800-
/O.NEW.KFFC.FF.W.0026.190802T0157Z-190802T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
957 PM EDT Thu Aug 1 2019

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Southeastern Banks County in northeastern Georgia...
  Northeastern Jackson County in northeastern Georgia...
  Madison County in northeastern Georgia...

* Until 400 AM EDT Friday.

* At 956 PM EDT, Doppler radar indicated heavy rain across the 
  warned area. Three to four inches of rain have fallen. 
  Localized flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Commerce, Homer, Danielsville, Maysville, Nicholson, Comer,
  Colbert, Ila, Pocataligo, Diamond Hill, Neese and Banks Crossing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3432 8339 3426 8334 3424 8334 3426 8330
      3424 8324 3425 8320 3424 8317 3419 8312
      3405 8313 3403 8317 3407 8348 3433 8355
      3434 8339

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 8:17 PM EDTSpecial Weather StatementFFCMarion, Stewart, Talbot, Taylor, Webster28 min
Aug 1, 8:28 PM EDTSpecial Weather StatementFFCClayton32 min
Aug 1, 8:47 PM EDTSpecial Weather StatementFFCStewart28 min
Aug 1, 9:11 PM EDTSpecial Weather StatementFFCFayette34 min
Aug 1, 9:18 PM EDTSpecial Weather StatementFFCForsyth27 min
Aug 1, 9:56 PM EDTSpecial Weather StatementFFCCobb34 min
Aug 1, 11:10 PM EDTFlash Flood WarningFFCCobb, DeKalb, Fulton, Gwinnett6 hr
Aug 2, 3:40 PM EDTSpecial Weather StatementFFCGwinnett35 min
Aug 2, 3:44 PM EDTSpecial Weather StatementFFCPulaski31 min
Aug 2, 3:52 PM EDTSpecial Weather StatementFFCFannin23 min
Aug 2, 4:51 PM EDTSpecial Weather StatementFFCCherokee24 min
Aug 2, 5:11 PM EDTSpecial Weather StatementFFCClayton34 min
Aug 2, 5:28 PM EDTSpecial Weather StatementFFCCobb32 min
Aug 2, 5:34 PM EDTSpecial Weather StatementFFCMurray26 min
Aug 2, 5:35 PM EDTSpecial Weather StatementFFCCatoosa25 min
Aug 2, 6:23 PM EDTSpecial Weather StatementFFCCoweta37 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.