Alert archive / Georgia / Flash Flood Warnings in 2015

Flash Flood Warning 3, NWS Atlanta, GA

January 4, 20154 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Jan 4, 2015, 5:04 AM EST for 4 counties in Georgia. It was in force for 6 hr. 2 reports 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: Jan 4, 2015, 5:04 AM EST (10:04 UTC)
Expired: Jan 4, 2015, 11:00 AM EST
In force: 6 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

Counties Cherokee County, GA, Cobb County, GA, Forsyth County, GA, Fulton County, GA

The radar

The Atlanta radar (KFFC), 84 km from the middle of the area, began a volume at 10:08 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

Time	Report	Where	Remark
Jan 4, 5:30 AM EST	FLASH FLOOD	1 S Country Place, GA	THE STAGE HEIGHT ON A USGS STREAM GAGE ON THE BIG CREEK AT KIMBALL BRIDGE ROAD NEAR ALPHARETTA REACHED FLOOD STAGE OF 7 FEET. THE CREEK WAS CONTINUING TO RISE. MINOR FLOODING WAS OCCURRING IN WOODLANDS...FIELDS AND PORTIONS OF THE BIG CREEK GREENWAY.
Jan 4, 7:45 AM EST	FLASH FLOOD	1 Sw Andersonville, GA	THE STAGE HEIGHT ON A USGS GAGE ON THE LITTLE RIVER AT WOODSTOCK REACHED FLOOD STAGE OF 11 FEET. THE CREEK IS CONTINUING TO RISE. MINOR FLOODING IS OCCURRING IN THE WOODLANDS AND FIELDS UPSTREAM AND DOWNSTREAM FROM THE GAGE AT OLD GEORGIA HWY 5. A PUBLIC BOAT

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, 10.1 hours before the alert went out and 81 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: 8 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 456 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 259 m²/s²
0-3 km storm-relative helicity: 247 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.

242 
WGUS52 KFFC 041004
FFWFFC
GAC057-067-117-121-041600-
/O.NEW.KFFC.FF.W.0003.150104T1004Z-150104T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
504 AM EST SUN JAN 4 2015

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FORSYTH COUNTY IN NORTH CENTRAL GEORGIA...
  SOUTHEASTERN CHEROKEE COUNTY IN NORTH CENTRAL GEORGIA...
  NORTHEASTERN FULTON COUNTY IN NORTH CENTRAL GEORGIA...
  NORTHEASTERN COBB COUNTY IN NORTH CENTRAL GEORGIA...

* UNTIL 1100 AM EST SUNDAY

* AT 458 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR AND
  AUTOMATED RAIN GAUGES INDICATED HEAVY RAIN FALLING ACROSS THE
  WARNED AREA. UP TO TWO INCHES OF RAIN HAVE ALREADY FALLEN. FLASH
  FLOODING WILL BE POSSIBLE.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN
THE WARNED AREA. SOME LOCATIONS EXPECTED TO FLOOD THIS MORNING ARE
NOONDAY CREEK...SOPE CREEK...BIG CREEK AND THE LITTLE RIVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT ENTER OR CROSS FLOWING WATER OR WATER OF UNKNOWN DEPTH. 

IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6 OR TWEET US YOUR WARNING AT
NWSATLANTA.

&&

LAT...LON 3433 8410 3410 8410 3407 8412 3403 8412
      3403 8417 3399 8419 3399 8420 3400 8422
      3400 8424 3396 8428 3397 8434 3387 8435
      3386 8453 3423 8452 3434 8432

$$
16

2 follow-up statements

812 
WGUS72 KFFC 041254
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
754 AM EST SUN JAN 4 2015

GAC057-067-117-121-041600-
/O.CON.KFFC.FF.W.0003.000000T0000Z-150104T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FORSYTH GA-CHEROKEE GA-FULTON GA-COBB GA-
754 AM EST SUN JAN 4 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1100 AM EST FOR
FORSYTH...SOUTHEASTERN CHEROKEE...NORTHEASTERN FULTON AND
NORTHEASTERN COBB COUNTIES...

AT 750 AM EST...GAUGE REPORTS INDICATED QUICKLY RISING CREEKS AND RIVERS
IN THE WARNED AREA AS A RESULT OF HEAVY RAIN. UP TO TWO INCHES OF RAIN HAVE 
FALLEN. ALTHOUGH THE RAIN CONTINUES TO DIMINISH...RAPID RISES ARE STILL
OCCURRING...PARTICULARLY ALONG BIG CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6 OR TWEET US YOUR REPORT AT
NWSATLANTA.

&&

LAT...LON 3433 8410 3410 8410 3407 8412 3403 8412
      3403 8417 3399 8419 3399 8420 3400 8422
      3400 8424 3396 8428 3397 8434 3387 8435
      3386 8453 3423 8452 3434 8432

$$

251 
WGUS72 KFFC 041552
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1052 AM EST SUN JAN 4 2015

GAC057-067-117-121-041600-
/O.EXP.KFFC.FF.W.0003.000000T0000Z-150104T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FORSYTH GA-CHEROKEE GA-FULTON GA-COBB GA-
1052 AM EST SUN JAN 4 2015

...THE FLASH FLOOD WARNING FOR FORSYTH...SOUTHEASTERN CHEROKEE...
NORTHEASTERN FULTON AND NORTHEASTERN COBB COUNTIES WILL EXPIRE AT
1100 AM EST...

ALTHOUGH THE HEAVY RAIN HAS ENDED...RUNOFF CONTINUES TO ALLOW AREA
RIVERS AND CREEKS TO RISE. THE FLASH FLOODING THREAT HAS DIMINISHED...
BUT FLOODING CONCERNS ALONG AREA CREEKS AND RIVERS CONTINUE TO BE MONITORED 
AND IF NECESSARY A RIVER FLOOD WARNING MAY BE ISSUED.

LAT...LON 3433 8410 3410 8410 3407 8412 3403 8412
      3403 8417 3399 8419 3399 8420 3400 8422
      3400 8424 3396 8428 3397 8434 3387 8435
      3386 8453 3423 8452 3434 8432

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 3, 7:06 PM EST	Special Weather Statement	FFC	Haralson, Polk	39 min
Jan 3, 7:24 PM EST	Special Weather Statement	FFC	Polk	21 min
Jan 3, 7:38 PM EST	Special Weather Statement	FFC	Bartow, Paulding	37 min
Jan 3, 8:49 PM EST	Special Weather Statement	FFC	Gilmer, Union	26 min
Jan 3, 9:24 PM EST	Special Weather Statement	FFC	Chattooga, Dade, Walker	36 min
Jan 3, 9:41 PM EST	Special Weather Statement	FFC	Floyd, Polk	49 min
Jan 3, 9:55 PM EST	Special Weather Statement	FFC	Catoosa, Whitfield	35 min
Jan 3, 10:08 PM EST	Special Weather Statement	FFC	Bartow, Polk	22 min
Jan 3, 10:26 PM EST	Special Weather Statement	FFC	Haralson, Paulding	34 min
Jan 3, 10:48 PM EST	Special Weather Statement	FFC	Douglas, Fulton	27 min
Jan 3, 10:50 PM EST	Special Weather Statement	FFC	Bartow, Cherokee	25 min
Jan 4, 1:15 AM EST	Flash Flood Warning	FFC	Cobb, Paulding	6 hr
Jan 4, 1:42 AM EST	Flash Flood Warning	FFC	Floyd, Haralson, Polk	6 hr
Jan 4, 2:32 AM EST	Flash Flood Watch	FFC	Banks, Barrow, Bartow, Carroll, Catoosa, Chattooga and 26 more	10 hr
Jan 4, 3:08 AM EST	Special Weather Statement	FFC	Haralson, Paulding, Polk	37 min
Jan 4, 3:32 AM EST	Special Weather Statement	FFC	Haralson, Paulding	28 min
Jan 4, 3:40 AM EST	River Flood Warning	FFC	Forsyth	22 hr
Jan 4, 4:00 AM EST	Special Weather Statement	FFC	Haralson	30 min
Jan 4, 4:26 AM EST	Special Weather Statement	FFC	Carroll, Paulding	34 min
Jan 4, 4:45 AM EST	Special Weather Statement	FFC	Cobb	30 min
Jan 4, 5:10 AM EST	Special Weather Statement	FFC	DeKalb, Forsyth, Fulton	35 min
Jan 4, 5:11 AM EST	Special Weather Statement	FFC	Coweta, Fayette, Troup	34 min
Jan 4, 5:37 AM EST	Special Weather Statement	FFC	Gwinnett	23 min
Jan 4, 5:40 AM EST	Special Weather Statement	FFC	Clayton, Fayette, Henry, Meriwether, Pike, Spalding	35 min
Jan 4, 5:53 AM EST	River Flood Warning	FFC	Polk	10 hr
Jan 4, 5:53 AM EST	River Flood Warning	FFC	Forsyth, Fulton	46 hr
Jan 4, 6:00 AM EST	Special Weather Statement	FFC	Barrow, Jackson	30 min
Jan 4, 6:10 AM EST	Special Weather Statement	FFC	Henry, Newton, Pike, Spalding	35 min
Jan 4, 6:30 AM EST	Special Weather Statement	FFC	Muscogee	30 min
Jan 4, 6:40 AM EST	Special Weather Statement	FFC	Butts, Spalding	35 min
Jan 4, 6:42 AM EST	Special Weather Statement	FFC	Madison	33 min
Jan 4, 6:59 AM EST	Special Weather Statement	FFC	Chattahoochee, Marion, Talbot	31 min
Jan 4, 7:21 AM EST	Flash Flood Warning	FFC	DeKalb	4 hr
Jan 4, 7:23 AM EST	River Flood Warning	FFC	Dawson, Forsyth	14 hr
Jan 4, 7:31 AM EST	Special Weather Statement	FFC	Upson	29 min
Jan 4, 8:18 AM EST	Special Weather Statement	FFC	Bibb	27 min
Jan 4, 8:23 AM EST	Severe Thunderstorm Warning	FFC	Bibb, Jones, Monroe	24 min
Jan 4, 9:12 AM EST	River Flood Warning	FFC	Polk	7 hr
Jan 4, 9:39 AM EST	River Flood Warning	FFC	Cherokee	7 days
Jan 4, 10:34 AM EST	River Flood Warning	FFC	Haralson	7 days
Jan 4, 10:50 AM EST	River Flood Warning	FFC	Cherokee, Cobb	7 days
Jan 4, 10:50 AM EST	River Flood Warning	FFC	Cherokee	7 days
Jan 4, 11:07 AM EST	Special Weather Statement	FFC	Dooly	23 min
Jan 4, 11:37 AM EST	Severe Thunderstorm Warning	FFC	Dodge, Pulaski	23 min
Jan 4, 12:01 PM EST	Special Weather Statement	FFC	Laurens	29 min
Jan 4, 12:02 PM EST	River Flood Warning	FFC	Gwinnett, Walton	6 hr
Jan 4, 12:31 PM EST	River Flood Warning	FFC	Cobb	7 days
Jan 4, 12:31 PM EST	Special Weather Statement	FFC	Treutlen	29 min
Jan 4, 12:38 PM EST	Tornado Warning	FFC	Emanuel, Laurens, Treutlen	37 min
Jan 4, 12:52 PM EST	River Flood Warning	FFC	Floyd, Polk	7 days
Jan 4, 1:06 PM EST	Tornado Warning	FFC	Emanuel	24 min
Jan 4, 1:38 PM EST	River Flood Warning	FFC	Cherokee	19 hr
Jan 4, 3:39 PM EST	River Flood Warning	FFC	Whitfield	10 hr

Nearby

Flash Flood Warnings in Georgia, 2015 Every flash flood warning in 2015

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.