Alert archive / Georgia / Flash Flood Warnings in 2005

Flash Flood Warning 45, NWS Atlanta, GA

August 18, 2005White County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 18, 2005, 7:44 PM EDT for White County, 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
Aug 18, 2005, 7:44 PM EDT (23:44 UTC)
Expired
Aug 18, 2005, 10:45 PM EDT
In force
3 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), 139 km from the middle of the area, began a volume at 23:48 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, 11.7 hours before the alert went out and 167 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 2005-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1255 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 2005-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
1255 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
720 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
7 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 182349
FFWFFC
GAC311-190245-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
744 PM EDT THU AUG 18 2005

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN WHITE COUNTY IN NORTHEAST GEORGIA

* UNTIL 1045 PM EDT

* AT 739 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS AND HEAVY RAIN CONTINUING ACROSS THE NORTHERN PART   
  OF WHITE COUNTY. TWO INCHES OF RAIN HAVE FALLEN SINCE 645PM        
  AND MORE IS EXPECTED BETWEEN  745 AND 845 PM. MOST OF THE HEAVY    
  RAIN WAS FALLING FROM THE HELEN AREA NORTH INTO THE NATIONAL       
  FOREST.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  UNICOI STATE PARK.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS CAMPGROUNDS NEAR
THE BANKS OF CREEKS AND STREAMS.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

LAT...LON 3481 8378 3468 8384 3463 8366 3475 8362

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

$$
1 follow-up statement
000 
WGUS72 KFFC 190139
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
933 PM EDT THU AUG 18 2005

GAC311-190245-
WHITE-
933 PM EDT THU AUG 18 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 1045 PM EDT FOR NORTHERN
WHITE COUNTY...

AT 932 PM EDT...RAIN HAD TAPERED OFF IN INTENSITY. ONLY LIGHT RAIN 
IS EXPECTED BETWEEN NOW AND 1030 PM. 

FLOODING IS OCCURRING OR IS IMMINENT. CAMPERS AND HIKERS SHOULD 
AVOID STREAMS OR CREEKS. THERE HAVE BEEN REPORTS OF SIGNIFICANT 
FLOODING IN THE AREA AROUND UNICOI STATE PARK. WATER LEVELS MAY 
REMAIN HIGH OR CONTINUE TO RISE DUE TO RUNOFF BETWEEN NOW AND 1045 
PM.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE 
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. 

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

LAT...LON 3481 8378 3468 8384 3463 8366 3475 8362

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 10:35 PM EDTFlash Flood WarningFFCGreene3 hr
Aug 18, 4:46 PM EDTSevere Thunderstorm WarningFFCClayton29 min
Aug 18, 5:05 PM EDTSevere Thunderstorm WarningFFCDeKalb25 min
Aug 18, 5:41 PM EDTSevere Thunderstorm WarningFFCHenry34 min

Nearby

Flash Flood Warnings in Georgia, 2005Every flash flood warning in 2005

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.