Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 42, NWS Atlanta, GA

July 6, 2013Whitfield County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 6, 2013, 7:38 PM EDT for Whitfield County, Georgia. It was in force for 5 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: Jul 6, 2013, 7:38 PM EDT (23:38 UTC)
Expired: Jul 7, 2013, 12:30 AM EDT
In force: 5 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

County Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 110 km from the middle of the area, began a volume at 23:40 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, 11.6 hours before the alert went out and 163 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: 457 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 504 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

519 
WGUS52 KFFC 062338
FFWFFC
GAC313-070430-
/O.NEW.KFFC.FF.W.0042.130706T2338Z-130707T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
738 PM EDT SAT JUL 6 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN WHITFIELD COUNTY IN NORTHWEST GEORGIA

* UNTIL 1230 AM EDT

* AT 730 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
FLASH FLOODING FROM STORMS WHICH HAVE MOVED OVER THE WARNED AREA THE 
PAST SEVERAL HOURS PRODUCING RAINFALL AMOUNTS OF 1 TO 2.5 INCHES. 
FLOOD WATERS ARE MOVING DOWN MILL CREEK. THE FLOOD CREST IS EXPECTED 
TO REACH DALTON AROUND 8 PM.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
VARNELL...DALTON...AND COHUTTA.

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. YOU CAN ALSO TWEET YOUR REPORT
USING HASHTAG GAWX.

&&

LAT...LON 3493 8484 3486 8482 3484 8485 3481 8486
      3480 8484 3478 8486 3479 8487 3475 8485
      3471 8486 3471 8493 3467 8489 3468 8494
      3463 8491 3462 8500 3491 8499 3499 8496
      3499 8482

$$
30

2 follow-up statements

954 
WGUS72 KFFC 070112
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
912 PM EDT SAT JUL 6 2013

GAC313-070430-
/O.CON.KFFC.FF.W.0042.000000T0000Z-130707T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WHITFIELD GA-
912 PM EDT SAT JUL 6 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM EDT FOR
EASTERN WHITFIELD COUNTY...

AT 906 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS FLASH FLOODING 
INCLUDING HIGH WATER ON SOME RURAL ROADS WAS OCCURRING WITHIN THE 
WARNED AREA.  IN ADDITION...FLOOD WATERS ARE MOVING DOWN MILL CREEK 
INTO COAHULLA CREEK NEAR THE KEITHS MILL. THE FLOOD CREST IS 
EXPECTED TO REACH KEITHS MILL AFTER MIDNIGHT. FLOOD STAGE IS 16 FEET 
AT KEITHS MILL AND THE 9 PM STAGE WAS 15.35 FEET.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
VARNELL...DALTON...AND COHUTTA

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. YOU CAN ALSO TWEET YOUR REPORT
USING HASHTAG GAWX.

&&

LAT...LON 3493 8484 3486 8482 3484 8485 3481 8486
      3480 8484 3478 8486 3479 8487 3475 8485
      3471 8486 3471 8493 3467 8489 3468 8494
      3463 8491 3462 8500 3491 8499 3499 8496
      3499 8482

$$
30

193 
WGUS72 KFFC 070427
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1227 AM EDT SUN JUL 7 2013

GAC313-070437-
/O.EXP.KFFC.FF.W.0042.000000T0000Z-130707T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WHITFIELD GA-
1227 AM EDT SUN JUL 7 2013

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1230 AM EDT FOR EASTERN
WHITFIELD COUNTY...

THE HEAVY RAIN HAS MOVED OUT OF THE COUNTY...BUT HIGH WATER MAY 
STILL REMAIN ACROSS THE AREA.

IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6. YOU CAN ALSO TWEET YOUR REPORT
USING HASHTAG GAWX.

LAT...LON 3493 8484 3486 8482 3484 8485 3481 8486
      3480 8484 3478 8486 3479 8487 3475 8485
      3471 8486 3471 8493 3467 8489 3468 8494
      3463 8491 3462 8500 3491 8499 3499 8496
      3499 8482

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 8:05 PM EDT	Special Weather Statement	FFC	Jones	25 min
Jul 5, 8:12 PM EDT	Special Weather Statement	FFC	Cherokee, Cobb, Coweta, Douglas, Fulton, Paulding	48 min
Jul 5, 10:28 PM EDT	Special Weather Statement	FFC	Clarke, Madison	47 min
Jul 6, 3:49 AM EDT	Special Weather Statement	FFC	Barrow, Jackson, Walton	41 min
Jul 6, 4:29 AM EDT	Special Weather Statement	FFC	Barrow, Jackson, Towns, White	46 min
Jul 6, 5:16 AM EDT	Special Weather Statement	FFC	Towns, White	29 min
Jul 6, 5:44 AM EDT	Special Weather Statement	FFC	Towns, White	31 min
Jul 6, 1:06 PM EDT	Special Weather Statement	FFC	Whitfield	24 min
Jul 6, 1:14 PM EDT	River Flood Warning	FFC	Johnson, Washington, Wilkinson	15 hr
Jul 6, 1:14 PM EDT	River Flood Warning	FFC	Emanuel, Treutlen	28 hr
Jul 6, 3:27 PM EDT	Special Weather Statement	FFC	Chattahoochee, Marion, Muscogee, Schley, Stewart, Sumter and 1 more	48 min
Jul 6, 4:00 PM EDT	Special Weather Statement	FFC	Floyd, Gordon, Polk	45 min
Jul 6, 5:24 PM EDT	Special Weather Statement	FFC	Carroll, Douglas	36 min
Jul 6, 6:37 PM EDT	Flash Flood Warning	FFC	Floyd, Polk	4 hr
Jul 6, 7:52 PM EDT	Special Weather Statement	FFC	Forsyth, Gwinnett	38 min

Nearby

Flash Flood Warnings in Georgia, 2013 Every flash flood warning in 2013

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.