Alert archive / Georgia / Flash Flood Warnings in 2008

Flash Flood Warning 2, NWS Atlanta, GA

March 30, 2008Henry County, Georgia

NWS Atlanta, GA issued this flash flood warning at Mar 30, 2008, 1:52 AM EDT for Henry County, Georgia. It was in force for 4 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Mar 30, 2008, 1:52 AM EDT (05:52 UTC)
Expired
Mar 30, 2008, 5:45 AM EDT
In force
4 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

County Henry County, GA

The radar

The Atlanta radar (KFFC), 39 km from the middle of the area, began a volume at 05:54 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.

What was reported inside it

TimeReportWhereRemark
Mar 30, 3:45 AM EDTFLASH FLOOD2 Wnw Mcdonough, GA911 DISPATCH REPORTED CULPEPPER LANE OFF OF JONESBORO ROAD CLOSED DUE TO 2 FEET OF WATER FLOWING OVER THE ROADWAY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 5.9 hours before the alert went out and 33 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 00:00Z on 2008-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2008-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
713 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KFFC 300554
FFWFFC
GAC151-300945-
/O.NEW.KFFC.FF.W.0002.080330T0552Z-080330T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
152 AM EDT SUN MAR 30 2008

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 545 AM EDT

* AT 148 AM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLOODING
  AT MCDONOUGH PARKWAY AND HIGHWAY 20 AND ALSO HIGHWAY 220 
  SOUTHBOUND IN MCDONOUGH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MCDONOUGH.

RAINFALL AMOUNTS OF 3 TO 4 INCHES HAVE FALLEN OVER THE WARNED AREA 
DURING THE PAST 3 HOURS AND ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 
INCHES ARE POSSIBLE IN THE SAME AREA.

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

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. 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.

IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

LAT...LON 3343 8434 3343 8430 3351 8404 3350 8403
      3350 8400 3349 8398 3343 8395 3335 8426
      3335 8435
TIME...MOT...LOC 0552Z 180DEG 0KT 3347 8401 3339 8434
          3336 8456

$$
2 follow-up statements
000 
WGUS72 KFFC 300637
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
234 AM EDT SUN MAR 30 2008

GAC151-300945-
/O.CON.KFFC.FF.W.0002.000000T0000Z-080330T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HENRY GA-
234 AM EDT SUN MAR 30 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 AM EDT FOR HENRY
COUNTY...

AT 230 AM EDT...MODERATE TO HEAVY RAIN CONTINUE TO FALL ACROSS PARTS 
OF CENTRAL AND SOUTHERN HENRY COUNTY. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MCDONOUGH. 
SOME CREEKS AFFECTED BY THE FLOODING ARE BIRCH CREEK...CAMP CREEK... 
KALVES CREEK...WALNUT CREEK...HONEY CREEK AND THE TOWALIGA RIVER.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

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

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. 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.

IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

LAT...LON 3343 8434 3343 8430 3351 8404 3350 8403
      3350 8400 3349 8398 3343 8395 3335 8426
      3335 8435
TIME...MOT...LOC 0634Z 180DEG 0KT 3347 8401 3339 8434
          3336 8456

$$
000 
WGUS72 KFFC 300854
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
449 AM EDT SUN MAR 30 2008

GAC151-300945-
/O.CON.KFFC.FF.W.0002.000000T0000Z-080330T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HENRY GA-
449 AM EDT SUN MAR 30 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 AM EDT FOR HENRY
COUNTY...

AT 445 AM EDT...LIGHT TO MODERATE RAIN CONTINUES TO FALL ACROSS 
PARTS OF CENTRAL AND SOUTHERN HENRY COUNTY. RAINFALL AMOUNTS OF 3 TO 
6 INCHES HAS OCCURRED IN THE WARNED AREA SINCE 10 PM EDT SATURDAY 
NIGHT.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MCDONOUGH. 
SOME CREEKS AFFECTED BY THE FLOODING ARE BIRCH CREEK...CAMP CREEK... 
KALVES CREEK...WALNUT CREEK...HONEY CREEK AND THE TOWALIGA RIVER. 

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

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. 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. MOVE TO HIGHER GROUND.

IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

LAT...LON 3343 8434 3343 8430 3351 8404 3350 8403
      3350 8400 3349 8398 3343 8395 3335 8426
      3335 8435
TIME...MOT...LOC 0849Z 180DEG 0KT 3347 8401 3339 8434
          3336 8456

$$

16

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 30, 3:38 AM EDTFlash Flood WarningFFCMorgan, Putnam6 hr

Nearby

Flash Flood Warnings in Georgia, 2008Every flash flood warning in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.