Alert archive / Georgia / Flash Flood Warnings in 2003

Flash Flood Warning 55, NWS Atlanta, GA

May 8, 2003Heard County, Georgia

NWS Atlanta, GA issued this flash flood warning at May 8, 2003, 3:40 AM EDT for Heard 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: May 8, 2003, 3:40 AM EDT (07:40 UTC)
Expired: May 8, 2003, 6:45 AM EDT
In force: 3 hr
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

County Heard County, GA

The radar

The Atlanta radar (KFFC), 54 km from the middle of the area, began a volume at 07:41 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

Birmingham, AL (KBMX), launched 00:00Z, 7.7 hours before the alert went out and 153 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: 2242 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 809 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 8.2

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KFFC 080742
FFWATL
GAC149-081045-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
340 AM EDT THU MAY 8 2003

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HEARD COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 645 AM EDT

* AT 330 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
VERY HEAVY RAIN CONTINUING OVER PARTS OF HEARD COUNTY...MOVING TO 
THE EAST AROUND 20 MPH.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLASH FLOODING OF 
SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. 
ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS 
AND STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. TWO FEET OF RUSHING WATER CAN CARRY AWAY MOST VEHICLES...
INCLUDING SUVS AND PICKUPS. VEHICLES CAUGHT IN RISING WATER SHOULD
BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND.

LAT...LON 3340 8527 3317 8518 3324 8496 3341 8503

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 8:10 PM EDT	Flash Flood Warning	FFC	Fayette	3 hr
May 7, 8:13 PM EDT	Severe Thunderstorm Warning	FFC	Coweta, Fayette	32 min
May 7, 8:14 PM EDT	Severe Thunderstorm Warning	FFC	Spalding	46 min
May 7, 8:20 PM EDT	Severe Thunderstorm Warning	FFC	Meriwether	55 min
May 7, 8:44 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Troup	61 min
May 7, 10:21 PM EDT	Flash Flood Warning	FFC	Troup	3 hr
May 7, 10:41 PM EDT	Tornado Warning	FFC	Harris	49 min
May 7, 11:05 PM EDT	Tornado Warning	FFC	Harris	25 min
May 7, 11:30 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Talbot	45 min
May 7, 11:50 PM EDT	Flash Flood Warning	FFC	Coweta, Heard	4 hr
May 8, 12:52 AM EDT	Flash Flood Warning	FFC	Meriwether	4 hr
May 8, 1:11 AM EDT	Flash Flood Warning	FFC	Troup	3 hr
May 8, 3:04 AM EDT	Severe Thunderstorm Warning	FFC	Harris	26 min
May 8, 3:21 AM EDT	Severe Thunderstorm Warning	FFC	Talbot	39 min
May 8, 3:28 AM EDT	Tornado Warning	FFC	Harris, Talbot	47 min
May 8, 4:15 AM EDT	Flash Flood Warning	FFC	Troup	2 hr
May 8, 4:25 AM EDT	Severe Thunderstorm Warning	FFC	Taylor	35 min
May 8, 4:30 AM EDT	Flash Flood Warning	FFC	Meriwether	3 hr
May 8, 6:15 AM EDT	Flash Flood Warning	FFC	Troup	2 hr

Nearby

Flash Flood Warnings in Georgia, 2003 Every flash flood warning in 2003

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.