Alert archive / Georgia / Flash Flood Warnings in 2005

Flash Flood Warning 26, NWS Atlanta, GA

July 11, 2005DeKalb County, Fulton County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 11, 2005, 2:47 AM EDT for DeKalb County, Fulton County, Georgia. It was in force for 118 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 11, 2005, 2:47 AM EDT (06:47 UTC)
Expired: Jul 11, 2005, 4:45 AM EDT
In force: 118 min
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

Counties DeKalb County, GA, Fulton County, GA

The radar

The Atlanta radar (KFFC), 41 km from the middle of the area, began a volume at 06:48 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 00:00Z, 6.8 hours before the alert went out and 39 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 82 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 563 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 275 m²/s²
0-3 km storm-relative helicity: 298 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KFFC 110649
FFWFFC
GAC089-121-110845-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
247 AM EDT MON JUL 11 2005

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DEKALB COUNTY IN NORTH CENTRAL GEORGIA
  FULTON COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 445 AM EDT

* AT 243 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN APPROACHING DEKALB AND FULTON COUNTIES FROM THE
  SOUTH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  TURNER FIELD...TUCKER...REDAN...PIEDMONT PARK...PANTHERSVILLE...
  HAPEVILLE...EAST POINT...DRUID HILLS...DECATUR...CLARKSTON...
  AVONDALE ESTATES AND ATLANTA.

THIS WARNING INCLUDES PEACHTREE CREEK WHICH WILL EXCEED FLOOD STAGE 
AROUND 3 AM.

ADDITIONAL RAINFALL AMOUNTS OF 2 INCHES ARE POSSIBLE IN THE WARNED 
AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

LAT...LON 3358 8468 3367 8413 3390 8422 3384 8448

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.

Issued	Product	Office	Counties	Lasted
Jul 11, 3:02 AM EDT	Flash Flood Warning	FFC	Clayton, Henry	88 min
Jul 11, 3:22 AM EDT	Flash Flood Warning	FFC	Cobb	113 min
Jul 11, 5:19 AM EDT	Flash Flood Warning	FFC	Coweta	3 hr
Jul 11, 5:46 AM EDT	Flash Flood Warning	FFC	Douglas, Fulton	4 hr
Jul 11, 7:25 AM EDT	Flash Flood Warning	FFC	Cobb, Fayette	3 hr

Nearby

Flash Flood Warnings in Georgia, 2005 Every 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.