Alert archive / Georgia / Flash Flood Warnings in 2003

Flash Flood Warning 85, NWS Atlanta, GA

July 1, 2003DeKalb County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 1, 2003, 4:23 PM EDT for DeKalb 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 outline as issued.

The facts

Issued: Jul 1, 2003, 4:23 PM EDT (20:23 UTC)
Expired: Jul 1, 2003, 6:30 PM EDT
In force: 2 hr
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

County DeKalb County, GA

The radar

The Atlanta radar (KFFC), 52 km from the middle of the area, began a volume at 20:24 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, 8.4 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: 147 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 477 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 267 m²/s²
0-3 km storm-relative helicity: 356 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KFFC 012024
FFWATL
GAC089-012230-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
423 PM EDT TUE JUL 1 2003

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 630 PM EDT

* AT 419 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN 2 MILES EAST OF CANDLER-MCAFEE...MOVING NORTHEAST
  AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE AVONDALE ESTATES...BELVEDERE
  PARK...CLARKSTON...DECATUR...GRESHAM PARK...NORTH DECATUR...
  PANTHERSVILLE...PINE LAKE...REDAN...SCOTTDALE...STONE MOUNTAIN AND
  TUCKER

EXPECT FLOODING OF PEACHTREE CREEK AND NANCY CREEKS.

RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE LIKELY.

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.

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

LAT...LON 3368 8434 3366 8417 3380 8407 3390 8430

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 3:54 PM EDT	Flash Flood Warning	FFC	Fulton	2 hr
Jul 1, 3:58 PM EDT	Tornado Warning	FFC	Jasper	17 min
Jul 1, 5:17 PM EDT	Flash Flood Warning	FFC	Jasper	118 min
Jul 1, 5:21 PM EDT	Flash Flood Warning	FFC	Walton	114 min
Jul 1, 5:23 PM EDT	Tornado Warning	FFC	Hancock	22 min
Jul 1, 5:32 PM EDT	Flash Flood Warning	FFC	Greene	3 hr
Jul 1, 6:18 PM EDT	Flash Flood Warning	FFC	DeKalb, Fulton	3 hr
Jul 1, 6:44 PM EDT	Flash Flood Warning	FFC	Gwinnett	2 hr
Jul 1, 7:09 PM EDT	Flash Flood Warning	FFC	Barrow, Jackson	4 hr
Jul 1, 7:37 PM EDT	Flash Flood Warning	FFC	Clarke	3 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.