Alert archive / Georgia / Flash Flood Warnings in 2005

Flash Flood Warning 8, NWS Atlanta, GA

March 27, 2005DeKalb County, Fulton County, Georgia

NWS Atlanta, GA issued this flash flood warning at Mar 27, 2005, 10:42 PM EST for DeKalb County, Fulton County, Georgia. It was in force for 6 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: Mar 27, 2005, 10:42 PM EST (03:42 UTC)
Expired: Mar 28, 2005, 5:00 AM EST
In force: 6 hr
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), 60 km from the middle of the area, began a volume at 03:46 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, 3.7 hours before the alert went out and 57 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 762 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 262 m²/s²
0-3 km storm-relative helicity: 626 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 280345
FFWFFC
GAC089-121-280942-


BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1042 PM EST SUN MAR 27 2005

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 500 AM EST

* NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SEVERAL INCHES OF
  RAIN HAS FALLEN OVER PEACHTREE CREEK IN THE LAST FEW HOURS.

* FOR THE PEACHTREE CREEK NEAR ATLANTA...
   MINOR FLOODING IS FORECAST.
  THE LATEST STAGE WAS 16.8 FEET AT 10 PM SUNDAY.
  FLOOD STAGE IS 17.0 FEET.
   THE FORECAST FOR THE PEACHTREE CREEK NEAR ATLANTA... 
      THE CREEK WILL RISE ABOVE FLOOD STAGE AROUND 1 AM MONDAY.
      THE CREEK WILL CREST NEAR 17.9 FEET AROUND 3 AM MONDAY.
      THE CREEK WILL FALL BELOW FLOOD STAGE AROUND 5 AM MONDAY.

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 
SPORT UTILITY VEHICLES AND PICKUPS. VEHICLES CAUGHT IN RISING WATER 
SHOULD BE ABANDONED QUICKLY. MOVE TO HIGH GROUND.

A FLASH FLOOD WARNING MEANS THAT SIGNIFICANT FLOODING OF STREAMS...
CREEKS...AND ROADS IS EXPECTED. THIS MAY CAUSE SOME MODERATE TO MAJOR
INCONVENIENCES TO THE PUBLIC...AND PROPERTY DAMAGE OR THREAT TO LIFE 
IS ELEVATED.

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 3393 8421 3382 8421 3378 8447 3384 8445

$$
KDF

1 follow-up statement

000 
WGUS72 KFFC 280924
FFSFFC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
423 AM EST MON MAR 28 2005


GAC089-121-281123-
423 AM EST MON MAR 28 2005

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

FOR THE PEACHTREE CREEK NEAR ATLANTA...
   FLOODING IS NO LONGER EXPECTED.
   THE LATEST STAGE WAS 14.1 FEET AT 4 AM MONDAY.
   THE FORECAST FOR THE PEACHTREE CREEK NEAR ATLANTA...
          THE RIVER WILL REMAIN BELOW FLOOD STAGE.
          A SLOW FALL IS EXPECTED.



$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 27, 7:22 PM EST	Severe Thunderstorm Warning	FFC	Heard, Troup	23 min
Mar 27, 8:41 PM EST	Severe Thunderstorm Warning	FFC	Coweta	34 min
Mar 27, 8:51 PM EST	Flash Flood Warning	FFC	Houston, Peach	6 hr
Mar 27, 9:15 PM EST	Flash Flood Warning	FFC	Sumter	6 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.