Alert archive / Georgia / Flash Flood Warnings in 2009
Flash Flood Warning 47, NWS Atlanta, GA
NWS Atlanta, GA issued this flash flood warning at Sep 26, 2009, 5:00 PM EDT for 4 counties in Georgia. It was in force for 4 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
- Sep 26, 2009, 5:00 PM EDT (21:00 UTC)
- Expired
- Sep 26, 2009, 8:42 PM EDT
- In force
- 4 hr
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Flood severity
- None
Counties DeKalb County, GA, Forsyth County, GA, Fulton County, GA, Gwinnett County, GA
The radar
The Atlanta radar (KFFC), 62 km from the middle of the area, began a volume at 21:03 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, 9.0 hours before the alert went out and 60 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.
- Mixed-layer CAPE
- 1105 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 824 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS52 KFFC 262100
FFWFFC
GAC089-117-121-135-270300-
/O.NEW.KFFC.FF.W.0047.090926T2100Z-090927T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
500 PM EDT SAT SEP 26 2009
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
DEKALB COUNTY IN NORTH CENTRAL GEORGIA
SOUTHERN FORSYTH COUNTY IN NORTH CENTRAL GEORGIA
FULTON COUNTY IN NORTH CENTRAL GEORGIA
GWINNETT COUNTY IN NORTH CENTRAL GEORGIA
* UNTIL 1100 PM EDT
* AT 454 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A LINE OF THUNDERSTORMS WITH HEAVY RAIN FROM ALPHARETTA THROUGH
ATLANTA AND DOUGLASVILLE TO WHITESBURG. HEAVY RAINFALL AMOUNTS UP
TO TWO INCHES MAY OCCUR IN ONE HOUR AS THESE STORMS MOVE THROUGH
THE WARNED AREA. THIS MAY CAUSE SOME FLASH FLOODING OF SMALL
STREAMS AND CREEKS DUE TO SATURATED SOILS. RAINFALL AMOUNTS UP TO
ONE INCH HAVE ALREADY OCCURRED TODAY IN THE WARNED AREA. THIS AREA
IS STILL RECOVERING FROM FLOODING EARLIER THIS WEEK AND MAY HAVE
DEBRIS BLOCKAGE OF STORM DRAINS.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
DORAVILLE...MOUNTAIN PARK...SUWANEE...SUGAR HILL...REST HAVEN...
NORCROSS...LAWRENCEVILLE...DULUTH...DACULA...BUFORD...BERKELEY
LAKE...DUNWOODY...JOHNS CREEK...MILTON...SANDY SPRINGS...ROSWELL...
ALPHARETTA AND CUMMING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3363 8475 3366 8467 3383 8446 3390 8444
3397 8437 3410 8442 3419 8433 3419 8426
3426 8426 3422 8398 3418 8406 3410 8383
3400 8386 3393 8380 3372 8406 3362 8412
3365 8427 3365 8445 3356 8446 3352 8483
$$2 follow-up statements
000
WGUS72 KFFC 262338
FFSFFC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
738 PM EDT SAT SEP 26 2009
GAC089-117-121-135-270300-
/O.CON.KFFC.FF.W.0047.000000T0000Z-090927T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DEKALB GA-GWINNETT GA-FORSYTH GA-FULTON GA-
738 PM EDT SAT SEP 26 2009
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1100 PM EDT FOR
FULTON...SOUTHERN FORSYTH...GWINNETT AND DEKALB COUNTIES...
AT 730 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES
ONLY LIGHT RAIN PASSING OVER THE WARNED AREA AND THIS WILL CONTINUE
FOR ANOTHER HOUR OR TWO. TOTAL RAINFALL AMOUNTS OF 1 TO 2 INCHES
OCCURRED IN THE WARNED AREA...WITH UP TO 3 INCHES IN SOUTHWEST
DEKALB AND NORTHEAST GWINNETT COUNTIES.
THE NORTH FORK PEACHTREE CREEK AT BUFORD HIGHWAY REACHED 12.1 FEET
AT 715 PM EDT...AND WAS IN MINOR FLOOD. FLOOD STAGE IS 12 FEET.
THE CREEK WILL CONTINUE TO RISE SLOWLY TO NEAR 12.5 FEET IN THE
NEXT HOUR THEN FALL BELOW FLOOD STAGE BY 1000 PM EDT.
SEVERAL PUBLIC REPORTS OF TEMPORARY STREET FLOODING HAVE BEEN
RECEIVED. NANCY CREEK IN ATLANTA...CROOKED CREEK NEAR NORCROSS
AND PEW CREEK NEAR LAWRENCEVILLE WERE ABOVE BANKFULL AND SLOWLY
RISING. ALL OF THESE CREEKS SHOULD CREST JUST BELOW THEIR
RESPECTIVE FLOOD STAGES IN THE NEXT FEW HOURS.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GRAYSON...
SUWANEE...SUGAR HILL...REST HAVEN...NORCROSS...LAWRENCEVILLE...
DULUTH...DACULA...BUFORD...BERKELEY LAKE...DORAVILLE...DUNWOODY...
JOHNS CREEK...MILTON...SANDY SPRINGS...ROSWELL...ALPHARETTA AND
CUMMING
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.
&&
LAT...LON 3363 8475 3366 8467 3383 8446 3390 8444
3397 8437 3410 8442 3419 8433 3419 8426
3426 8426 3422 8398 3418 8406 3410 8383
3400 8386 3393 8380 3372 8406 3362 8412
3365 8427 3365 8445 3356 8446 3352 8483
$$000
WGUS72 KFFC 270042
FFSFFC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
842 PM EDT SAT SEP 26 2009
GAC089-117-121-135-270055-
/O.CAN.KFFC.FF.W.0047.000000T0000Z-090927T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DEKALB GA-GWINNETT GA-FORSYTH GA-FULTON GA-
842 PM EDT SAT SEP 26 2009
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR FULTON...SOUTHERN
FORSYTH...GWINNETT AND DEKALB COUNTIES...
AT 840 PM EDT...RADAR INDICATES ONLY SPOTTY LIGHT RAIN PASSING OVER
THE PREVIOUSLY WARNED AREA. THE TEMPORARY STREET FLOODING...SMALL
STREAM AND CREEK FLOODING THAT OCCURRED EARLIER WITH THE HEAVY RAIN
HAVE RECEDED.
AT 815 PM EDT...THE NORTH FORK PEACHTREE CREEK AT BUFORD HIGHWAY WAS
AT 11.8 FEET AND FALLING. FLOOD STAGE IS 12 FEET. THE CREEK CRESTED
AT 12.1 FEET AT 715 PM EDT. THE CREEK WILL CONTINUE TO FALL.
LAT...LON 3363 8475 3366 8467 3383 8446 3390 8444
3397 8437 3410 8442 3419 8433 3419 8426
3426 8426 3422 8398 3418 8406 3410 8383
3400 8386 3393 8380 3372 8406 3362 8412
3365 8427 3365 8445 3356 8446 3352 8483
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 26, 2:56 AM EDT | Flash Flood Warning | FFC | Murray, Whitfield | 6 hr |
| Sep 26, 9:15 AM EDT | Flash Flood Warning | FFC | Chattooga, Floyd, Gordon, Murray, Walker, Whitfield | 6 hr |
| Sep 26, 12:21 PM EDT | Flash Flood Warning | FFC | Catoosa, Chattooga, Dade, Floyd, Walker, Whitfield | 6 hr |
| Sep 26, 3:24 PM EDT | Areal Flood Warning | FFC | Gordon, Murray, Whitfield | 4 hr |
| Sep 26, 3:47 PM EDT | Flash Flood Warning | FFC | Carroll, Cherokee, Cobb, Douglas, Paulding | 6 hr |
| Sep 26, 4:20 PM EDT | Severe Thunderstorm Warning | FFC | Heard | 40 min |
| Sep 26, 5:26 PM EDT | River Flood Warning | FFC | Gordon, Murray, Whitfield | 3 days |
| Sep 26, 5:46 PM EDT | Severe Thunderstorm Warning | FFC | Morgan | 44 min |
| Sep 26, 6:20 PM EDT | Severe Thunderstorm Warning | FFC | Putnam | 40 min |
| Sep 26, 6:35 PM EDT | Severe Thunderstorm Warning | FFC | Baldwin, Jones | 40 min |
| Sep 26, 6:40 PM EDT | Severe Thunderstorm Warning | FFC | Chattahoochee, Marion, Muscogee, Talbot | 39 min |
| Sep 26, 6:50 PM EDT | River Flood Warning | FFC | Murray, Whitfield | 44 hr |
| Sep 26, 6:50 PM EDT | River Flood Warning | FFC | Whitfield | 69 hr |
Nearby
Flash Flood Warnings in Georgia, 2009Every flash flood warning in 2009
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.