Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 43, NWS Atlanta, GA

July 7, 20134 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 7, 2013, 7:35 PM EDT 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
Jul 7, 2013, 7:35 PM EDT (23:35 UTC)
Expired
Jul 8, 2013, 1:30 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Catoosa County, GA, Murray County, GA, Walker County, GA, Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 101 km from the middle of the area, began a volume at 23:39 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

TimeReportWhereRemark
Jul 7, 9:00 PM EDTFLASH FLOOD5 N Dalton, GAFAMILY EVACUATED FROM THEIR HOME DUE TO RISING WATERS.
Jul 7, 9:00 PM EDTFLASH FLOOD5 Sw Ringgold, GAWATER OVER ALABAMA HIGHWAY AND SEVERAL OTHER ROADS IN THE SOUTHERN END OF THE COUNTY.

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 12:00Z, 11.6 hours before the alert went out and 165 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2013-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 98 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2013-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
98 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
552 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

665 
WGUS52 KFFC 072335
FFWFFC
GAC047-213-295-313-080530-
/O.NEW.KFFC.FF.W.0043.130707T2335Z-130708T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
735 PM EDT SUN JUL 7 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN CATOOSA COUNTY IN NORTHWEST GEORGIA
  NORTHERN MURRAY COUNTY IN NORTHWEST GEORGIA
  CENTRAL WALKER COUNTY IN NORTHWEST GEORGIA
  WHITFIELD COUNTY IN NORTHWEST GEORGIA

* UNTIL 130 AM EDT

* AT 727 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  FLASH FLOODING FROM THUNDERSTORMS ALONG A LINE EXTENDING FROM ETON 
  TO TUNNEL HILL AND LAFAYETTE. THESE STORMS WERE MOVING NORTHEAST AT 
  10 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...AS WELL AS HIGHWAYS AND ROADS. ALSO...COUNTRY 
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW-
LYING AREAS ARE SUBJECT TO FLOODING.

SOME CREEKS LIKELY IMPACTED INCLUDE THE UPPER REACHES OF WEST 
CHICKAMAUGA CREEK...LITTLE CHICKAMAUGA CREEK...COAHULLA CREEK...SMITTY 
BRANCH...TIGER CREEK AND CAT CREEK.

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.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

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 3478 8473 3469 8494 3460 8549 3476 8545
      3500 8495 3499 8463

$$
1 follow-up statement
720 
WGUS72 KFFC 080139
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
939 PM EDT SUN JUL 7 2013

GAC047-213-295-313-080530-
/O.CON.KFFC.FF.W.0043.000000T0000Z-130708T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WHITFIELD GA-WALKER GA-MURRAY GA-CATOOSA GA-
939 PM EDT SUN JUL 7 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 AM EDT FOR
SOUTHERN CATOOSA...NORTHERN MURRAY...WALKER AND WHITFIELD COUNTIES...

AT 927 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED MOST OF
THE RAIN HAD TAPERED OFF TO LIGHT OR MODERATE...HOWEVER A THUNDERSTORM 
WITH HEAVY RAIN WAS LOCATED NEAR TUNNEL HILL AND RINGGOLD. THIS STORM 
WAS MOVING EAST AT 15 MPH. RUNOFF WILL CONTINUE FROM THE CURRENT RAIN 
AND THE PREVIOUS HEAVIER RAINFALL FOR THE NEXT COUPLE OF HOURS. 

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
DALTON...VARNELL...COHUTTA AND ETON. SOME CREEKS IMPACTED INCLUDE 
WEST CHICKAMAUGA CREEK...TOWN CREEK...PEAVINE CREEK...LITTLE 
CHICKAMAUGA CREEK...DRY CREEK...TIGER CREEK...CAT CREEK...SMITHEY 
BRANCH AND COAHULLA CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ALTHOUGH MOST AREAS IN THE WARNING WILL SEE AROUND A QUARTER OF AN 
INCH OF ADDITIONAL RAINFALL...AMOUNTS OF A HALF INCH TO AN INCH ARE 
POSSIBLE FROM AROUND TUNNEL HILL...WOOD STATION AND RINGGOLD TO ROCKY 
FACE...VARNELL AND COHUTTA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...AS WELL AS HIGHWAYS AND STREETS. ALSO...COUNTRY 
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW-
LYING AREAS ARE SUBJECT TO FLOODING.

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.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

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 3478 8473 3469 8494 3460 8549 3476 8545
      3500 8495 3499 8463

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 10:28 PM EDTAreal Flood WarningFFCFloyd, Polk3 hr
Jul 6, 10:48 PM EDTSpecial Weather StatementFFCMadison, Oglethorpe42 min
Jul 7, 12:16 AM EDTRiver Flood WarningFFCWhitfield4 days
Jul 7, 3:42 AM EDTRiver Flood WarningFFCMurray, Whitfield37 hr
Jul 7, 3:42 AM EDTRiver Flood WarningFFCGordon, Murray, Whitfield28 hr
Jul 7, 4:07 AM EDTRiver Flood WarningFFCElbert, Madison, Oglethorpe3 hr
Jul 7, 5:30 AM EDTRiver Flood WarningFFCDade10 hr
Jul 7, 6:01 AM EDTRiver Flood WarningFFCBibb, Houston, Jones, Monroe, Twiggs16 hr
Jul 7, 2:19 PM EDTRiver Flood WarningFFCClarke, Greene, Oconee22 hr
Jul 7, 4:10 PM EDTSpecial Weather StatementFFCHarris, Muscogee35 min
Jul 7, 4:48 PM EDTSpecial Weather StatementFFCCatoosa, Dade, Walker42 min
Jul 7, 5:39 PM EDTSpecial Weather StatementFFCCatoosa, Walker51 min
Jul 7, 5:59 PM EDTSpecial Weather StatementFFCWhitfield61 min
Jul 7, 6:10 PM EDTSpecial Weather StatementFFCDooly50 min
Jul 7, 6:52 PM EDTSpecial Weather StatementFFCChattahoochee, Marion, Schley, Stewart, Webster53 min
Jul 7, 6:57 PM EDTSpecial Weather StatementFFCMurray, Walker, Whitfield63 min
Jul 7, 7:10 PM EDTRiver Flood WarningFFCFloyd17 hr
Jul 7, 7:16 PM EDTSpecial Weather StatementFFCMacon44 min

Nearby

Flash Flood Warnings in Georgia, 2013Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.