Alert archive / Georgia / Flash Flood Warnings in 2005

Flash Flood Warning 41, NWS Atlanta, GA

August 13, 2005Gilmer County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 13, 2005, 12:35 PM EDT for Gilmer 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 13, 2005, 12:35 PM EDT (16:35 UTC)
Expired
Aug 13, 2005, 3:30 PM EDT
In force
3 hr
Issued by
NWS Atlanta, GA
Area
Counties, with a storm outline in the text

County Gilmer County, GA

The radar

The Northeast Alabama radar (KHTX), 144 km from the middle of the area, began a volume at 16:36 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, 4.6 hours before the alert went out and 155 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 2005-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 824 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 2005-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
824 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
612 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
22 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KFFC 131638
FFWFFC
GAC123-131930-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1235 PM EDT SAT AUG 13 2005

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN GILMER COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 330 PM EDT

* AT 1229 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM 6 MILES WEST OF CHERRY LOG...OR
  ABOUT 16 MILES EAST OF CHATSWORTH. THE STORM PRODUCING FLASH
  FLOODING WAS NEARLY STATIONARY.

* THE STORM PRODUCING FLASH FLOODING WAS OCCURRING BETWEEN ELLIJAY 
  AND BURNETT...PRIMARILY ALONG THE HARPER CREEK BASIN.

RESIDENTS ALONG AND NEAR HARPER CREEK SHOULD TAKE NECESSARY ACTIONS 
IMMEDIATELY.

LAT...LON 3470 8462 3471 8433 3486 8440 3484 8460

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
Aug 13, 1:09 PM EDTSevere Thunderstorm WarningFFCChattooga24 min
Aug 13, 2:10 PM EDTFlash Flood WarningFFCFannin3 hr
Aug 13, 2:29 PM EDTFlash Flood WarningFFCWhitfield3 hr

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.