Alert archive / Georgia / Flash Flood Warnings in 2012

Flash Flood Warning 11, NWS Atlanta, GA

May 13, 2012Harris County, Muscogee County, Georgia

NWS Atlanta, GA issued this flash flood warning at May 13, 2012, 7:47 PM EDT for Harris County, Muscogee County, Georgia. It was in force for 3 hr. 1 report 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 13, 2012, 7:47 PM EDT (23:47 UTC)
Expired
May 13, 2012, 10:49 PM EDT
In force
3 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Harris County, GA, Muscogee County, GA

What was reported inside it

TimeReportWhereRemark
May 13, 8:05 PM EDTFLASH FLOOD2 Wsw Midland, GAPUBLIC REPORTED FLOOD WATERS RUNNING OVER CHAPEL LAKE DRIVE OFF OF PIERCE CHAPEL ROAD ABOUT 2.7 MILES WEST SOUTHWEST OF MIDLAND, GEORGIA IN MUSCOGEE 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, 11.8 hours before the alert went out and 100 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 2012-05-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2012-05-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 202 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
563 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
202 m²/s²
0-3 km storm-relative helicity
405 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.

926 
WGUS52 KFFC 132347
FFWFFC
GAC145-215-140545-
/O.NEW.KFFC.FF.W.0011.120513T2347Z-120514T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
747 PM EDT SUN MAY 13 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL HARRIS COUNTY IN WEST CENTRAL GEORGIA
  MUSCOGEE COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 145 AM EDT MONDAY

* AT 740 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR RAINFALL    
  ESTIMATES WERE APPROACHING 2 TO 3 INCHES IN SOUTHERN HARRIS AND    
  NORTHWEST MUSCOGEE COUNTIES. ADDITIONAL RAINFALL AMOUNTS OF 1 TO   
  UP TO 2 INCHES CAN BE EXPECTED THIS EVENING.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MIDLAND...
  GOAT ROCK LAKE...MULBERRY GROVE...FORTSON AND CATAULA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. THOSE WITH 
INTERESTS ALONG THE CHATTAHOOCHEE RIVER AND ANY ASSOCIATED CREEKS 
AND TRIBUTARIES SHOULD REMAIN ALERT.

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 3267 8493 3265 8483 3260 8480 3249 8478
      3244 8485 3242 8497 3243 8497 3246 8501
      3251 8501 3259 8508 3262 8509 3265 8511

$$
1 follow-up statement
947 
WGUS72 KFFC 140249
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1049 PM EDT SUN MAY 13 2012

GAC145-215-140257-
/O.CAN.KFFC.FF.W.0011.000000T0000Z-120514T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MUSCOGEE GA-HARRIS GA-
1049 PM EDT SUN MAY 13 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTH CENTRAL
HARRIS AND MUSCOGEE COUNTIES...

THE HEAVY RAIN HAS DIMINISHED OVER THE WARNED AREA...AND ALTHOUGH 
LIGHT RAIN MAY CONTINUE... THE FLASH FLOOD THREAT HAS GREATLY 
DIMINISHED OVER THE PAST HOUR. THEREFORE... THE FLASH WARNING HAS 
BEEN CANCELLED.  

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 3267 8493 3265 8483 3260 8480 3249 8478
      3244 8485 3242 8497 3243 8497 3246 8501
      3251 8501 3259 8508 3262 8509 3265 8511

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 13, 4:27 PM EDTSpecial Weather StatementFFCHarris33 min
May 13, 4:54 PM EDTSpecial Weather StatementFFCHarris36 min
May 13, 5:21 PM EDTSpecial Weather StatementFFCHarris24 min
May 13, 5:29 PM EDTSpecial Weather StatementFFCStewart46 min
May 13, 6:01 PM EDTSpecial Weather StatementFFCMuscogee44 min
May 13, 6:31 PM EDTSpecial Weather StatementFFCStewart29 min
May 13, 6:38 PM EDTSpecial Weather StatementFFCHarris37 min
May 13, 7:23 PM EDTSpecial Weather StatementFFCMuscogee37 min

Nearby

Flash Flood Warnings in Georgia, 2012Every flash flood warning in 2012

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.