Alert archive / Georgia / Flash Flood Warnings in 2016

Flash Flood Warning 13, NWS Atlanta, GA

September 1, 20164 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Sep 1, 2016, 8:19 PM EDT for 4 counties in 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
Sep 1, 2016, 8:19 PM EDT (00:19 UTC)
Expired
Sep 2, 2016, 2:15 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Bartow County, GA, Cherokee County, GA, Gordon County, GA, Pickens County, GA

The radar

The Atlanta radar (KFFC), 116 km from the middle of the area, began a volume at 00:20 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, 0.3 hours before the alert went out and 117 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 2016-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 393 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 2016-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
393 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
1536 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
36 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

841 
WGUS52 KFFC 020019
FFWFFC
GAC015-057-129-227-020615-
/O.NEW.KFFC.FF.W.0013.160902T0019Z-160902T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
819 PM EDT THU SEP 1 2016

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN GORDON COUNTY IN NORTHWESTERN GEORGIA...
  SOUTHWESTERN PICKENS COUNTY IN NORTH CENTRAL GEORGIA...
  NORTHWESTERN CHEROKEE COUNTY IN NORTH CENTRAL GEORGIA...
  BARTOW COUNTY IN NORTHWESTERN GEORGIA...

* UNTIL 215 AM EDT

* AT 817 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. ONE TO THREE INCHES OF RAIN
  HAVE ALREADY FALLEN. AN ADDITIONAL ONE TO TWO INCHES ARE POSSIBLE.
  FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CARTERSVILLE...CALHOUN...ADAIRSVILLE...EUHARLEE...WHITE...
  WALESKA...KINGSTON...PLAINVILLE...CASSVILLE...FAIRMOUNT...
  PINE LOG...FUNKHOUSER...SALACOA VALLEY...TALMADGE...
  LAKE ARROWHEAD...STILESBORO...HINTON...FOLSOM...
  SONORAVILLE AND OOSTANAULA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6 OR TWEET US YOUR REPORT AT
NWSATLANTA.

&&

LAT...LON 3449 8459 3434 8445 3408 8495 3435 8502
      3435 8501 3439 8501 3439 8502 3440 8503
      3448 8505

$$
1 follow-up statement
505 
WGUS72 KFFC 020234
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1034 PM EDT THU SEP 1 2016

GAC015-057-129-227-020244-
/O.CAN.KFFC.FF.W.0013.000000T0000Z-160902T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GORDON GA-PICKENS GA-CHEROKEE GA-BARTOW GA-
1034 PM EDT THU SEP 1 2016

...THE FLASH FLOOD WARNING FOR SOUTHERN GORDON...SOUTHWESTERN
PICKENS...NORTHWESTERN CHEROKEE AND BARTOW 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 3449 8459 3434 8445 3408 8495 3435 8502
      3435 8501 3439 8501 3439 8502 3440 8503
      3448 8505

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 2:48 AM EDTSpecial Weather StatementFFCDeKalb42 min
Sep 2, 3:35 AM EDTSpecial Weather StatementFFCDeKalb55 min
Sep 2, 8:58 AM EDTAreal Flood WarningFFCDodge, Laurens, Montgomery, Pulaski, Telfair, Toombs and 3 more9 hr
Sep 2, 10:12 AM EDTAreal Flood WarningFFCBleckley, Dodge, Emanuel, Jefferson, Johnson, Laurens and 4 more9 hr

Nearby

Flash Flood Warnings in Georgia, 2016Every flash flood warning in 2016

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.