Alert archive / Georgia / Flash Flood Warnings in 2004

Flash Flood Warning 35, NWS Atlanta, GA

September 16, 2004White County, Georgia

NWS Atlanta, GA issued this flash flood warning at Sep 16, 2004, 11:15 PM EDT for White 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
Sep 16, 2004, 11:15 PM EDT (03:15 UTC)
Expired
Sep 17, 2004, 5:15 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Counties, with a storm outline in the text

County White County, GA

The radar

The Greer radar (KGSP), 144 km from the middle of the area, began a volume at 03:18 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

Nashville Metro, TN (KBNA), launched 00:00Z, 3.3 hours before the alert went out and 306 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, Nashville Metro, TN at 00:00Z on 2004-09-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 28 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, Nashville Metro, TN at 00:00Z on 2004-09-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
28 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
691 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS52 KFFC 170321
FFWATL
GAC311-170915-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1115 PM EDT THU SEP 16 2004

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR THE CHATTAHOCHEE RIVER AT HELEN IN...
  WHITE COUNTY IN NORTHEAST GEORGIA

* UNTIL 515 AM EDT

* FOR THE CHATTAHOOCHEE RIVER NEAR HELEN...
  THE LATEST STAGE WAS 6.0 FEET AT 10 PM THURSDAY.
  FLOOD STAGE IS 6.0 FEET.
   THE FORECAST FOR THE CHATTAHOOCHEE RIVER NEAR HELEN...
      THE RIVER WILL CREST BETWEEN 7 AND 8 FEET AROUND 6 AM FRIDAY.
      THE RIVER WILL FALL BELOW FLOOD STAGE MIDDAY FRIDAY.

AT 8.0 FEET...FLOOR OF RED BRICK HOUSES WHICH ARE LOCATED DOWN 
STREAM ON LEFT BANK WILL FLOOD. FLOOR OF HELENDORF MOTEL DOWN STREAM 
ON RIGHT BANK IS ALSO AT AN ELEVATION OF 8 FEET.  

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

LAT...LON 3455 8384 3454 8366 3477 8367 3476 8380

IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 16, 8:37 PM EDTFlash Flood WarningFFCBartow, Chattooga, Dade, Floyd, Gordon, Walker5 hr
Sep 16, 8:40 PM EDTFlash Flood WarningFFCClayton5 hr
Sep 16, 9:10 PM EDTFlash Flood WarningFFCDeKalb, Fulton6 hr
Sep 16, 9:35 PM EDTFlash Flood WarningFFCCobb5 hr
Sep 16, 10:24 PM EDTFlash Flood WarningFFCDeKalb, Fulton6 hr
Sep 17, 3:21 AM EDTFlash Flood WarningFFCDeKalb, Fulton5 hr

Nearby

Flash Flood Warnings in Georgia, 2004Every flash flood warning in 2004

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.