Alert archive / Georgia / Flash Flood Warnings in 2010

Flash Flood Warning 7, NWS Atlanta, GA

May 31, 2010Barrow County, Jackson County, Georgia

NWS Atlanta, GA issued this flash flood warning at May 31, 2010, 9:05 PM EDT for Barrow County, Jackson County, 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: May 31, 2010, 9:05 PM EDT (01:05 UTC)
Expired: Jun 1, 2010, 3:00 AM EDT
In force: 6 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

Counties Barrow County, GA, Jackson County, GA

The radar

The Atlanta radar (KFFC), 112 km from the middle of the area, began a volume at 01:09 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
May 31, 9:10 PM EDT	FLASH FLOOD	5 E Winder, GA	FLOWING WATER ONE FOOT DEEP THROUGH BACKYARDS OFF BRECKINRIDGE TRAIL AND OVER PLEASANT HILL CHURCH ROAD. MEASURED RAINFALL AMOUNT OF 5.90 INCHES DURING THE PAST 24 HOURS.
May 31, 11:00 PM EDT	FLASH FLOOD	2 Ssw Arcade, GA	A CULVERT PIPE WAS WASHED OUT ON MCCREERY ROAD AND ALSO ON HUNTER ROAD.

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, 1.1 hours before the alert went out and 107 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: 949 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1029 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

724 
WGUS52 KFFC 010105
FFWFFC
GAC013-157-010700-
/O.NEW.KFFC.FF.W.0007.100601T0105Z-100601T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
905 PM EDT MON MAY 31 2010

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BARROW COUNTY IN NORTH CENTRAL GEORGIA
  SOUTHERN JACKSON COUNTY IN NORTHEAST GEORGIA

* UNTIL 300 AM EDT

* AT 855 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  POTENTIAL FLASH FLOODING FROM TRAINING THUNDERSTORMS MOVING OVER   
  THE WARNED AREA. RAINFALL AMOUNTS UP TO 3 INCHES HAVE OCCURRED 
  SINCE 300 PM EDT THIS AFTERNOON. THIS HAS OCCURRED OVER THE SAME   
  AREA THAT RECEIVED AROUND 2 INCHES OF RAIN ON SUNDAY. ANOTHER 1 TO 
  2 INCHES OF RAIN CAN BE EXPECTED BEFORE ENDING LATER TONIGHT.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ARCADE...
  JEFFERSON...HOSCHTON AND BRASELTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3401 8349 3398 8350 3395 8356 3395 8381
      3400 8386 3411 8383 3414 8381 3415 8359

$$

16

2 follow-up statements

146 
WGUS72 KFFC 010249
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1049 PM EDT MON MAY 31 2010

GAC013-157-010700-
/O.CON.KFFC.FF.W.0007.000000T0000Z-100601T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BARROW GA-JACKSON GA-
1049 PM EDT MON MAY 31 2010

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 AM EDT FOR
SOUTHERN JACKSON AND BARROW COUNTIES...

AT 1036 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM WITH LIGHT TO MODERATE RAIN MOVING OVER THE 
WARNED AREA. FLASH FLOODING OF FLOWING WATER ONE FOOT DEEP WAS 
OCCURRING IN BACKYARDS OFF BRECKINRIDGE TRAIL AND OVER PLEASANT HILL 
CHURCH ROAD AROUND 5 MILES EAST OF WINDER. FLASH FLOODING MAY ALSO
BE OCCURRING ALONG BEECH CREEK AND BEAR CREEK. THE MULBERRY RIVER 
AND MIDDLE OCONEE RIVER ARE HAVING RAPID RISES AND MAY REACH FLOOD 
STAGE LATER TONIGHT.

RAINFALL AMOUNTS OF 2.5 TO 3.5 INCHES OF RAIN HAVE OCCURRED SINCE
300 PM EDT THIS AFTERNOON.  TOTAL RAINFALL AMOUNTS OF 5 TO 6 INCHES
HAVE OCCURRED OVER THE WARNED AREA SINCE SUNDAY. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
ARCADE...JEFFERSON...HOSCHTON AND BRASELTON.

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.

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 3401 8349 3398 8350 3395 8356 3395 8381
      3400 8386 3411 8383 3414 8381 3415 8359

$$

16

003 
WGUS72 KFFC 010444
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1244 AM EDT TUE JUN 1 2010

GAC013-157-010700-
/O.CON.KFFC.FF.W.0007.000000T0000Z-100601T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BARROW GA-JACKSON GA-
1244 AM EDT TUE JUN 1 2010

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 AM EDT FOR
SOUTHERN JACKSON AND BARROW COUNTIES...

AT 1244 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THE HEAVY RAIN HAS MOVED EAST OF THE WARNED AREA...AND ALTHOUGH 
ISOLATED SHOWERS WILL CONTINUE OVERNIGHT...THE THREAT OF ADDITIONAL 
HEAVY RAIN HAS GREATLY DIMINISHED. HOWEVER... RUNOFF FROM HEAVY 
RAINS EARLIER DURING THE EVENING WILL CONTINUE...CAUSING RISES ON 
AREA CREEKS...STREAMS AND RIVERS FOR THE NEXT SEVERAL HOURS. ONE 
EXAMPLE IS COUNTY OFFICIALS REPORT WATER OVER HUNTER ROAD IN ARCADE 
DUE TO WATER OUT OF THE BANKS OF A NEARBY CREEK. ALSO NOTED IS A 
SHARP RISE ON THE MIDDLE OCONEE RIVER NEAR ARCADE WHERE THE RIVER IS 
EXPECTED TO RISE ABOVE BANKFULL... BUT SHOULD CREST JUST BELOW FLOOD 
STAGE OF 16 FEET BY 7 AM THIS MORNING. SINCE NO ADDITIONAL HEAVY 
RAIN IS EXPECTED... THIS FLASH FLOOD WARNING WILL LIKELY BE ALLOWED 
TO EXPIRE AT 300 AM EDT THIS MORNING.     

SOME LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
ARCADE...JEFFERSON...HOSCHTON AND BRASELTON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN 
WATERS ARE 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. 

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 3401 8349 3398 8350 3395 8356 3395 8381
      3400 8386 3411 8383 3414 8381 3415 8359

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 1, 2:53 PM EDT	River Flood Warning	FFC	Clarke, Greene, Oconee	29 hr

Nearby

Flash Flood Warnings in Georgia, 2010 Every flash flood warning in 2010

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.