Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 52, NWS Atlanta, GA

July 10, 2013Dade County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 10, 2013, 9:54 PM EDT for Dade County, Georgia. It was in force for 4 hr. 3 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 10, 2013, 9:54 PM EDT (01:54 UTC)
Expired
Jul 11, 2013, 2:00 AM EDT
In force
4 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

County Dade County, GA

The radar

The Northeast Alabama radar (KHTX), 57 km from the middle of the area, began a volume at 01:54 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 10, 10:41 PM EDTFLASH FLOODTrenton, GASEVERAL ROADS WERE FLOODED. YARDS OF RESIDENCES WERE ALSO BEGINNING TO FLOOD.
Jul 11, 12:01 AM EDTFLASH FLOOD3 Ene Trenton, GATHE STAGE HEIGHT AT A USGS STREAM GAGE ON LOOKOUT CREEK NEAR NEW ENGLAND REACHED FLOOD STAGE OF 12 FEET. THE CREEK CREST AT 15.3 FEET. MINOR FLOODING OCCURRED WITH 1 TO 3 FEET OVER SEVERAL ROADS...SUCH AS SELLS LANE IN TRENTON...MASON ROAD NEAR RISING FAWN AND
Jul 11, 1:00 AM EDTFLASH FLOODTrenton, GASIX ROADS WERE DAMAGED BY FLASH FLOODING ACROSS THE COUNTY. TWO ROADS WERE WASHED OUT AND ARE CLOSED TO TRAFFIC...INCLUDING HARTLINE ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 1.9 hours before the alert went out and 179 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, Nashville Metro, TN at 00:00Z on 2013-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1081 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2013-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 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
1081 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
612 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.8

Open this sounding in Storm Lab

The text

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

627 
WGUS52 KFFC 110154
FFWFFC
GAC083-110600-
/O.NEW.KFFC.FF.W.0052.130711T0154Z-130711T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
954 PM EDT WED JUL 10 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DADE COUNTY IN NORTHWEST GEORGIA

* UNTIL 200 AM EDT

* AT 949 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. THIS STORM
  WAS NEARLY STATIONARY AND COULD PRODUCE AN ADDITIONAL 1 TO 2 INCHES
  OF RAIN. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO TRENTON.

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 3498 8536 3484 8545 3477 8545 3473 8546
      3469 8549 3467 8549 3463 8553 3478 8557
      3498 8560

$$
1 follow-up statement
068 
WGUS72 KFFC 110310
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1110 PM EDT WED JUL 10 2013

GAC083-110600-
/O.CON.KFFC.FF.W.0052.000000T0000Z-130711T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DADE GA-
1110 PM EDT WED JUL 10 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 AM EDT FOR DADE
COUNTY...

AT 1100 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE EXTREMELY HEAVY RAINFALL OVER DADE COUNTY WITH THREE HOUR 
TOTALS OF 3 TO 4 INCHES JUST WEST OF TRENTON. ANOTHER THUNDERSTORM 
HAS NOW PUSHED INTO THE WARNED AREA CREATING A DANGEROUS FLASH 
FLOODING SITUATION IN WHICH ANOTHER 2 INCHES OF RAIN IS LIKELY TO 
FALL. THERE HAVE ALREADY BEEN NUMEROUS REPORTS OF ROADS COVERED BY 
WATER AND WATER APPROACHING HOMES AND THIS SECOND WAVE OF RAIN WILL 
CERTAINLY CREATE ADDITIONAL FLASH FLOODING CONCERNS.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO TRENTON

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. YOU CAN ALSO TWEET YOUR REPORT
USING HASHTAG GAWX.

&&

LAT...LON 3498 8536 3484 8545 3477 8545 3473 8546
      3469 8549 3467 8549 3463 8553 3478 8557
      3498 8560

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 8:23 PM EDTSpecial Weather StatementFFCCatoosa, Dade, Murray, Walker, Whitfield52 min
Jul 10, 8:56 PM EDTSpecial Weather StatementFFCMurray, Whitfield49 min
Jul 10, 9:09 PM EDTFlash Flood WarningFFCMurray, Whitfield4 hr
Jul 10, 9:40 PM EDTSpecial Weather StatementFFCDade, Walker50 min
Jul 10, 10:32 PM EDTSpecial Weather StatementFFCDade, Walker43 min
Jul 10, 10:53 PM EDTSevere Thunderstorm WarningFFCChattooga, Dade, Walker52 min
Jul 10, 11:32 PM EDTSevere Thunderstorm WarningFFCChattooga, Floyd43 min
Jul 11, 12:15 AM EDTRiver Flood WarningFFCDade24 hr
Jul 11, 12:15 AM EDTSpecial Weather StatementFFCFloyd30 min
Jul 11, 2:04 AM EDTAreal Flood WarningFFCCatoosa, Chattooga, Dade, Gordon, Murray, Walker and 1 more6 hr
Jul 11, 3:58 AM EDTFlash Flood WatchFFCBaldwin, Banks, Barrow, Bartow, Bibb, Butts and 73 more24 hr
Jul 11, 6:18 AM EDTRiver Flood WarningFFCWhitfield41 hr
Jul 11, 5:14 PM EDTSpecial Weather StatementFFCTwiggs46 min
Jul 11, 6:44 PM EDTSpecial Weather StatementFFCCrawford, Taylor46 min
Jul 11, 6:47 PM EDTSpecial Weather StatementFFCStewart, Webster43 min
Jul 11, 6:50 PM EDTSpecial Weather StatementFFCBleckley, Pulaski, Wilcox40 min
Jul 11, 7:11 PM EDTSpecial Weather StatementFFCJasper, Putnam49 min
Jul 11, 7:29 PM EDTFlash Flood WarningFFCJasper, Morgan, Putnam4 hr
Jul 11, 7:34 PM EDTSpecial Weather StatementFFCDodge, Laurens, Wilcox26 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.