Alert archive / Georgia / Flash Flood Warnings in 2015

Flash Flood Warning 4, NWS Atlanta, GA

January 4, 2015DeKalb County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jan 4, 2015, 7:21 AM EST for DeKalb County, 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: Jan 4, 2015, 7:21 AM EST (12:21 UTC)
Expired: Jan 4, 2015, 11:15 AM EST
In force: 4 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

County DeKalb County, GA

The radar

The Atlanta radar (KFFC), 51 km from the middle of the area, began a volume at 12:23 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, 0.4 hours before the alert went out and 46 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: 552 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: -89 m²/s²
0-3 km storm-relative helicity: -149 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.

933 
WGUS52 KFFC 041221
FFWFFC
GAC089-041615-
/O.NEW.KFFC.FF.W.0004.150104T1221Z-150104T1615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 1115 AM EST

* AT 718 AM EST...GAUGE REPORTS INDICATED HEAVY RAIN FALLING ACROSS
  THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE ALREADY FALLEN.
  FLASH FLOODING IS LIKELY TO OCCUR ON SEVERAL CREEKS IN THE WARNED AREA. 
  ALTHOUGH THE RAIN WILL BE DIMINISHING...RAPID RISES OF THESE CREEKS ARE
  OCCURRING.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
  ATLANTA...DECATUR...CLARKSTON...STONE MOUNTAIN...AVONDALE
  ESTATES...LITHONIA...PINE LAKE...DRUID HILLS...NORTH DECATUR...
  CANDLER-MCAFEE...BELVEDERE PARK...TUCKER...NORTH DRUID HILLS...
  KIRKWOOD...SNAPFINGER...ARABIA MOUNTAIN...BELMONT...LITTLE FIVE
  POINTS...GRESHAM PARK AND EAST LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

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 WARNING AT
NWSATLANTA.

&&

LAT...LON 3379 8435 3386 8417 3378 8408 3375 8403
      3372 8406 3362 8411 3364 8416 3364 8417
      3365 8422 3363 8423 3363 8424 3365 8425
      3365 8435

$$

1 follow-up statement

809 
WGUS72 KFFC 041611
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1111 AM EST SUN JAN 4 2015

GAC089-041619-
/O.EXP.KFFC.FF.W.0004.000000T0000Z-150104T1615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DEKALB GA-
1111 AM EST SUN JAN 4 2015

...THE FLASH FLOOD WARNING FOR DEKALB COUNTY WILL EXPIRE AT 1115 AM
EST...

THE HEAVY RAIN HAS ENDED...AND HIGH WATERS AT AREA CREEKS AND RIVERS 
ARE BEGINNING TO RECEDE. FLOODING CONCERNS CONTINUE TO BE MONITORED...AND
IF NECESSARY A RIVER FLOOD WARNING MAY BE ISSUED.

LAT...LON 3379 8435 3386 8417 3378 8408 3375 8403
      3372 8406 3362 8411 3364 8416 3364 8417
      3365 8422 3363 8423 3363 8424 3365 8425
      3365 8435

$$

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, 5:04 AM EST	Flash Flood Warning	FFC	Cherokee, Cobb, Forsyth, Fulton	6 hr
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, 7:23 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.