Alert archive / Georgia / Flash Flood Warnings in 2003

Flash Flood Warning 70, NWS Atlanta, GA

June 17, 20034 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Jun 17, 2003, 2:00 AM EDT for 4 counties in 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: Jun 17, 2003, 2:00 AM EDT (06:00 UTC)
Expired: Jun 17, 2003, 5:00 AM EDT
In force: 3 hr
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

Counties Cobb County, GA, DeKalb County, GA, Fulton County, GA, Gwinnett County, GA

The radar

The Atlanta radar (KFFC), 74 km from the middle of the area, began a volume at 06:00 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, 6.0 hours before the alert went out and 71 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: 1038 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1507 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 37 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 170603
FFWATL
GAC067-089-121-135-170900-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
200 AM EDT TUE JUN 17 2003

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN COBB COUNTY IN NORTH CENTRAL GEORGIA   
  NORTHERN DEKALB COUNTY IN NORTH CENTRAL GEORGIA   
  CENTRAL AND NORTHERN FULTON COUNTY IN NORTH CENTRAL GEORGIA
  GWINNETT COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 500 AM EDT

* AT 155 AM EDT...LOCAL LAW ENFORCEMENT OFFICIALS AND MEDIA REPORTED 
  FLASH FLOODING FROM EXTREME EASTERN COBB COUNTY ACROSS PORTIONS OF 
  CENTRAL AND NORTHERN FULTON COUNTY...NORTHERN DEKALB COUNTY AND 
  MUCH OF GWINNETT COUNTY.

EXCESSIVE RUNOFF FROM STORMS EARLIER THIS EVENING HAS CAUSED FLASH 
FLOODING OF MANY SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES 
ACROSS THESE AREAS. ADDITIONALLY...COUNTRY ROADS AND WOODLANDS ALONG 
THE BANKS OF CREEKS AND STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT 
TO FLASH FLOODING IN MORE RURAL PORTIONS OF THESE COUNTIES.

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 3398 8451 3379 8452 3392 8380 3418 8390

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 9:47 PM EDT	Severe Thunderstorm Warning	FFC	Clayton	28 min
Jun 16, 10:24 PM EDT	Severe Thunderstorm Warning	FFC	Chattooga	36 min
Jun 16, 11:07 PM EDT	Severe Thunderstorm Warning	FFC	Hall	23 min
Jun 16, 11:50 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Gordon	40 min
Jun 17, 4:51 AM EDT	Flash Flood Warning	FFC	Fayette	114 min
Jun 17, 5:29 AM EDT	Flash Flood Warning	FFC	Gwinnett	2 hr
Jun 17, 6:47 AM EDT	Flash Flood Warning	FFC	Clayton, Fayette	2 hr
Jun 17, 7:22 AM EDT	Flash Flood Warning	FFC	DeKalb, Fulton	98 min

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.