Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 90, NWS Atlanta, GA

August 19, 2013Upson County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 19, 2013, 9:06 PM EDT for Upson County, Georgia. It was in force for 6 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
Aug 19, 2013, 9:06 PM EDT (01:06 UTC)
Expired
Aug 20, 2013, 3:00 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

County Upson County, GA

The radar

The Atlanta radar (KFFC), 61 km from the middle of the area, began a volume at 01:10 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
Aug 19, 10:00 PM EDTFLASH FLOOD1 S Thomaston, GAUPSON COUNTY EMERGENCY MANAGER REPORTS MLK JR DRIVE AND WALTON STREET BLOCKED BY A FLOODED CREEK IN THE LINCOLN PARK NEIGHBORHOOD SOUTH OF THOMASTON.

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 61 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 00:00Z on 2013-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1503 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 00:00Z on 2013-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
1503 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
675 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
64 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

428 
WGUS52 KFFC 200106
FFWFFC
GAC293-200700-
/O.NEW.KFFC.FF.W.0090.130820T0106Z-130820T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
906 PM EDT MON AUG 19 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN UPSON COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 300 AM EDT

* AT 855 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  BETWEEN 3 AND 4 INCHES OF RAIN HAS FALLEN OVER PARTS OF WESTERN 
  UPSON COUNTY...RESULTING IN FLASH FLOODING OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THOMASTON.
  SOME CREEKS IMPACTED INCLUDE BELL CREEK...POTATO CREEK AND SWIFT 
  CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF UP TO 2 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...AS WELL AS HIGHWAYS AND STREETS. ADDITIONALLY... 
COUNTRY ROADS...FORESTLANDS 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.

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 3296 8436 3294 8422 3271 8421 3274 8424
      3273 8424 3276 8433 3279 8435 3278 8438
      3284 8442 3282 8445 3286 8449 3287 8447
      3288 8450 3291 8451

$$
1 follow-up statement
446 
WGUS72 KFFC 200246
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1046 PM EDT MON AUG 19 2013

GAC293-200700-
/O.CON.KFFC.FF.W.0090.000000T0000Z-130820T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
UPSON GA-
1046 PM EDT MON AUG 19 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 AM EDT FOR
WESTERN UPSON COUNTY...

AT 1039 PM EDT...THE COUNTY EMERGENCY MANAGER REPORTED MARTIN LUTHER 
KING JR DRIVE AND WALTON STREET BLOCKED BY A FLOODING CREEK IN THE 
LINCOLN PARK NEIGHBORHOOD. ALTHOUGH MOST OF THE HEAVY RAIN HAS 
DISSIPATED...FLOOD WATERS WILL CONTINUE TO RISE ON AREA CREEKS AND 
STREAMS THROUGH THE EVENING INTO THE EARLY MORNING. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THOMASTON... 
LINCOLN PARK...ROLAND...BIRDSONG CROSSROADS AND ADAMS FERRY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS UP TO A QUARTER INCH ARE POSSIBLE IN THE 
WARNED AREA.

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

SOME CREEKS IMPACTED INCLUDE POTATO CREEK...BELL CREEK...WOMBLE 
CREEK...SWIFT CREEK AND JERRY REEVES CREEK.

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 3296 8436 3294 8422 3271 8421 3274 8424
      3273 8424 3276 8433 3279 8435 3278 8438
      3284 8442 3282 8445 3286 8449 3287 8447
      3288 8450 3291 8451

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 8:05 PM EDTSpecial Weather StatementFFCTaylor, Upson40 min
Aug 19, 8:29 PM EDTAreal Flood WarningFFCToombs6 hr
Aug 19, 8:37 PM EDTSpecial Weather StatementFFCHaralson38 min
Aug 19, 8:49 PM EDTSpecial Weather StatementFFCUpson41 min
Aug 19, 9:12 PM EDTSpecial Weather StatementFFCDodge, Wilcox48 min
Aug 19, 10:53 PM EDTSpecial Weather StatementFFCDade, Walker52 min
Aug 20, 3:23 AM EDTFlash Flood WatchFFCBaldwin, Bibb, Bleckley, Chattahoochee, Crawford, Crisp and 29 more20 hr
Aug 20, 12:31 PM EDTRiver Flood WarningFFCDodge, Telfair, Wilcox5 days
Aug 20, 7:37 PM EDTSpecial Weather StatementFFCChattahoochee, Muscogee38 min
Aug 20, 7:50 PM EDTSpecial Weather StatementFFCSumter25 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.