Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 85, NWS Atlanta, GA

August 16, 20134 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 16, 2013, 9:19 AM EDT for 4 counties in 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 16, 2013, 9:19 AM EDT (13:19 UTC)
Expired
Aug 16, 2013, 3:15 PM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Bibb County, GA, Houston County, GA, Peach County, GA, Twiggs County, GA

The radar

The Robins AFB radar (KJGX), 17 km from the middle of the area, began a volume at 13:19 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 16, 10:00 AM EDTFLASH FLOOD1 Ne Centerville, GATHE HOUSTON COUNTY EMERGENCY MANAGER REPORTS FLOOD WATERS FROM DRAINAGE DITICHES AND SMALL STREAMS OVERFLOWING PORTIONS OF AROUND 10 ROADS IN THE CENTERVILLE AREA. SOME MINOR FLOODING OF A FEW RESIDENTIAL YARDS NEAR THE STREAMS OCCURRED. THE FLOOD WATERS HAVE

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, 1.3 hours before the alert went out and 124 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 2013-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLEL10008507005003002001001 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 2013-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 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
2 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
467 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

158 
WGUS52 KFFC 161319
FFWFFC
GAC021-153-225-289-161915-
/O.NEW.KFFC.FF.W.0085.130816T1319Z-130816T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
919 AM EDT FRI AUG 16 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL BIBB COUNTY IN CENTRAL GEORGIA
  NORTHERN HOUSTON COUNTY IN CENTRAL GEORGIA
  EASTERN PEACH COUNTY IN CENTRAL GEORGIA
  CENTRAL TWIGGS COUNTY IN CENTRAL GEORGIA

* UNTIL 315 PM EDT

* AT 913 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  SHOWERS WITH HEAVY RAIN WHICH MAY CAUSE FLASH FLOODING OVER THE    
  WARNED AREA. RAINFALL AMOUNTS OF 2 TO 2.5 INCHES IN HOUR WERE 
  OCCURRING AS THE SHOWERS MOVED NORTHEAST AT 15 MPH. BEULAH         
  BRANCH...BAY GALL CREEK AND SANDY RUN CREEK BASINS SHOULD BEGIN
  OVERFLOWING THEIR BANKS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WARNER
  ROBINS...JEFFERSONVILLE...BYRON AND CENTERVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3244 8381 3265 8383 3283 8337 3268 8328
      3264 8326 3263 8326

$$


16
1 follow-up statement
885 
WGUS72 KFFC 161529
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1129 AM EDT FRI AUG 16 2013

GAC021-153-225-289-161615-
/O.CAN.KFFC.FF.W.0085.000000T0000Z-130816T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TWIGGS GA-PEACH GA-BIBB GA-HOUSTON GA-
1129 AM EDT FRI AUG 16 2013

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHERN HOUSTON...
SOUTH CENTRAL BIBB...EASTERN PEACH AND CENTRAL TWIGGS COUNTIES...

THE HEAVY RAIN EARLIER OVER THE WARNED AREA HAS MOVED NORTHEAST AND 
ONLY LIGHT RAIN IS OCCURRING AT THIS TIME. RAINFALL AMOUNTS OF 1.5 
TO 3 INCHES OCCURRED SINCE 800 AM EDT. 

THE HOUSTON COUNTY EMERGENCY MANAGER REPORTS FLOOD WATERS FROM 
DRAINAGE DITCHES AND SMALL STREAMS OVERFLOWING PORTIONS OF AROUND 10 
ROADS IN THE CENTERVILLE AREA. SOME MINOR FLOODING OF A FEW 
RESIDENTIAL YARDS NEAR THE STREAMS OCCURRED. THE FLOOD WATERS HAVE 
BEEN FLOWING INTO THE BAY GALL CREEK BASIN AND ARE RECEDING AT THIS 
TIME.

NO REPORTS OF FLOODING OTHER THAN WATER PONDING ON ROADS OCCURRED
IN EAST PEACH COUNTY...SOUTH BIBB COUNTY AND THE WEST SIDE OF TWIGGS 
COUNTY.

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 3244 8381 3265 8383 3283 8337 3268 8328
      3264 8326 3263 8326

$$


16

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 15, 11:53 PM EDTSpecial Weather StatementFFCCrisp, Wilcox37 min
Aug 16, 5:24 AM EDTSpecial Weather StatementFFCSumter, Webster51 min
Aug 16, 8:59 AM EDTSpecial Weather StatementFFCHouston, Peach, Twiggs46 min
Aug 16, 12:15 PM EDTSpecial Weather StatementFFCWilcox60 min
Aug 16, 1:34 PM EDTSpecial Weather StatementFFCDodge, Laurens56 min
Aug 16, 2:12 PM EDTSpecial Weather StatementFFCTelfair, Wheeler63 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.