Alert archive / Georgia / Flash Flood Warnings in 2003

Flash Flood Warning 62, NWS Atlanta, GA

May 18, 2003DeKalb County, Fulton County, Georgia

NWS Atlanta, GA issued this flash flood warning at May 18, 2003, 3:35 AM EDT for DeKalb County, Fulton County, Georgia. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 18, 2003, 3:35 AM EDT (07:35 UTC)
Expired: May 18, 2003, 6:00 AM EDT
In force: 2 hr
Issued by: NWS Atlanta, GA
Area: Whole counties

Counties DeKalb County, GA, Fulton County, GA

The radar

The Atlanta radar (KFFC), 51 km from the middle of the area, began a volume at 07:34 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, 7.6 hours before the alert went out and 48 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: 2590 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 819 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 6.2

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KFFC 180735
FFWATL
GAC089-121-181000-
BULLETIN - EAS ACTIVATION REQUESTED	
FLASH FLOOD WARNING 
NATIONAL WEATHER SERVICE PEACHTREE CITY GA 
335 AM EDT SUN MAY 18 2003


THE NATIONAL WEATHER SERVICE HAS ISSUED A


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


* UNTIL 6 AM

* HEAVY RAIN THIS PAST EVENING AND EARLY THIS MORNING HAS PRODUCED 
SIGNIFICANT RUNOFF CAUSING PEACHTREE CREEK TO RISE ABOVE FLOOD STAGE.

* FOR THE PEACHTREE CREEK NEAR ATLANTA...
   MINOR FLOODING IS OCCURRING.
   MINOR FLOODING IS FORECAST.
   LATEST STAGE...WAS 15.3 FEET AT 315 AM SUNDAY.
   BANKFULL STAGE...IS 13.0 FEET.  
   FLOOD STAGE...IS 17.0 FEET.
   THE FORECAST...FOR THE PEACHTREE CREEK NEAR ATLANTA... 
          IT WILL RISE ABOVE FLOOD STAGE AT 345 AM
          IT WILL CREST BETWEEN 17.0 AND 17.5 FEET AROUND 430 AM
          IT WILL FALL BELOW FLOOD STAGE BETWEEN 5 AM AND 6 AM


DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE 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 HIGH GROUND.

YOU CAN REPORT SERIOUS FLOODING TO THE NATIONAL WEATHER SERVICE BY 
CALLING 7 7 0 4 8 6 1 1 3 3 AT EXTENSION 2 0 4.


$$

LAT...LON 3394 8440 3370 8454 3369 8412 3392 8423

1 follow-up statement

000 
WGUS72 KFFC 180922
FFSATL
GAC089-121-180940-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
518 AM EDT SUN MAY 18 2003

...FLASH FLOOD WARNING HAS BEEN CANCELLED FOR PEACHTREE CREEK...

THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR PEACHTREE CREEK HAS 
BEEN CANCELLED. FLOOD STAGE AT PEACHTREE CREEK IS 17.0 FEET. THE 
LATEST STAGE ON PEACHTREE CREEK WAS 15.5 FEET AT 5 AM...AND FALLING. 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 8:32 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee	28 min
May 17, 11:52 PM EDT	Severe Thunderstorm Warning	FFC	Chattooga	53 min
May 18, 4:27 AM EDT	Flash Flood Warning	FFC	Chattooga, Floyd	3 hr
May 18, 5:40 AM EDT	Flash Flood Warning	FFC	Bartow	3 hr
May 18, 3:58 PM EDT	Severe Thunderstorm Warning	FFC	Dodge	32 min
May 18, 4:01 PM EDT	Severe Thunderstorm Warning	FFC	Jones	29 min
May 18, 4:16 PM EDT	Severe Thunderstorm Warning	FFC	Wilkinson	29 min
May 18, 4:18 PM EDT	Severe Thunderstorm Warning	FFC	Telfair	27 min
May 18, 4:40 PM EDT	Severe Thunderstorm Warning	FFC	Bleckley, Laurens	35 min
May 18, 4:46 PM EDT	Severe Thunderstorm Warning	FFC	Wilcox	29 min
May 18, 4:59 PM EDT	Severe Thunderstorm Warning	FFC	Wilkinson	31 min
May 18, 5:19 PM EDT	Severe Thunderstorm Warning	FFC	Washington	26 min
May 18, 5:27 PM EDT	Severe Thunderstorm Warning	FFC	Telfair	33 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.