Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 97, NWS Atlanta, GA

August 23, 20135 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 23, 2013, 7:38 PM EDT for 5 counties in Georgia. It was in force for 4 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: Aug 23, 2013, 7:38 PM EDT (23:38 UTC)
Expired: Aug 23, 2013, 11:30 PM EDT
In force: 4 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

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

The radar

The Robins AFB radar (KJGX), 32 km from the middle of the area, began a volume at 23:38 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

Time	Report	Where	Remark
Aug 23, 8:00 PM EDT	FLASH FLOOD	2 Nnw Warner Robins, GA	THE HOUSTON COUNTY EMERGENCY MANAGER REPORTED WATER RUNNING OVER DUNBAR ROAD AND MINNIE LANE AND DUNBAR ROAD AND FAIRGROUNDS BLVD.
Aug 23, 9:13 PM EDT	HEAVY RAIN 3.39	Macon, GA	MEASURED AT PLUM AND MLK BLVD IN DOWNTOWN MACON. IS ROUGHLY A 2 HOUR TOTAL.

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 101 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 984 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 788 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: -12 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

098 
WGUS52 KFFC 232338
FFWFFC
GAC021-079-153-225-289-240330-
/O.NEW.KFFC.FF.W.0097.130823T2338Z-130824T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
738 PM EDT FRI AUG 23 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BIBB COUNTY IN CENTRAL GEORGIA
  EAST CENTRAL CRAWFORD COUNTY IN CENTRAL GEORGIA
  NORTH CENTRAL HOUSTON COUNTY IN CENTRAL GEORGIA
  NORTHEASTERN PEACH COUNTY IN CENTRAL GEORGIA
  WEST CENTRAL TWIGGS COUNTY IN CENTRAL GEORGIA

* UNTIL 1130 PM EDT

* AT 736 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
FLASH FLOODING FROM A CLUSTER OF SLOW MOVING THUNDERSTORMS OVER THE 
WARNED AREA. RADAR ESTIMATES THAT UP TO 2.50 INCHES HAS FALLEN OVER THE 
LAST 2 HOURS ACROSS PORTIONS OF THE CITY OF MACON.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PAYNE CITY
  AND MACON.

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.

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 3260 8387 3293 8375 3292 8369 3289 8365
      3289 8361 3288 8359 3287 8358 3287 8356
      3284 8352 3259 8347

$$
30

2 follow-up statements

789 
WGUS72 KFFC 240051
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
851 PM EDT FRI AUG 23 2013

GAC021-079-153-225-289-240330-
/O.CON.KFFC.FF.W.0097.000000T0000Z-130824T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TWIGGS GA-PEACH GA-BIBB GA-CRAWFORD GA-HOUSTON GA-
851 PM EDT FRI AUG 23 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT FOR
NORTH CENTRAL HOUSTON...EAST CENTRAL CRAWFORD...BIBB...NORTHEASTERN
PEACH AND WEST CENTRAL TWIGGS COUNTIES...

AT 848 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE FLASH FLOODING OVER THE WARNED AREA.  OBSERVATIONS IN 
DOWNTOWN MACON INDICATE THAT 2.90 INCHES OF RAIN HAS FALLEN OVER THE 
PAST 2 HOURS.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PAYNE CITY
AND MACON

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.

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 3260 8387 3293 8375 3292 8369 3289 8365
      3289 8361 3288 8359 3287 8358 3287 8356
      3284 8352 3259 8347

$$
30

730 
WGUS72 KFFC 240321
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1121 PM EDT FRI AUG 23 2013

GAC021-079-153-225-289-240331-
/O.EXP.KFFC.FF.W.0097.000000T0000Z-130824T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TWIGGS GA-PEACH GA-BIBB GA-CRAWFORD GA-HOUSTON GA-
1121 PM EDT FRI AUG 23 2013

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1130 PM EDT FOR NORTH
CENTRAL HOUSTON...EAST CENTRAL CRAWFORD...BIBB...NORTHEASTERN PEACH
AND WEST CENTRAL TWIGGS COUNTIES...

THE RAIN HAS COME TO AN END ACROSS THE AREA AND THE WATER HAS HAD 
TIME TO RECEDE. THUS THE FLASH FLOOD WARNING WILL BE ALLOWED TO 
EXPIRE AT 1130 PM EDT.

IF YOU SAW 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 3260 8387 3293 8375 3292 8369 3289 8365
      3289 8361 3288 8359 3287 8358 3287 8356
      3284 8352 3259 8347

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 8:26 PM EDT	Flash Flood Warning	FFC	Carroll, Haralson	6 hr
Aug 23, 5:43 PM EDT	Special Weather Statement	FFC	Jefferson	47 min
Aug 23, 6:31 PM EDT	Special Weather Statement	FFC	Muscogee	29 min
Aug 23, 6:34 PM EDT	Severe Thunderstorm Warning	FFC	Bibb, Crawford, Houston, Peach	41 min
Aug 23, 6:57 PM EDT	Severe Thunderstorm Warning	FFC	Bibb, Houston, Twiggs	48 min
Aug 23, 6:59 PM EDT	Special Weather Statement	FFC	Harris	61 min
Aug 23, 7:00 PM EDT	Special Weather Statement	FFC	Talbot	30 min
Aug 23, 7:01 PM EDT	Special Weather Statement	FFC	Johnson	29 min
Aug 23, 7:10 PM EDT	Flash Flood Warning	FFC	Emanuel, Jefferson, Johnson, Washington	6 hr
Aug 23, 7:12 PM EDT	Special Weather Statement	FFC	Johnson, Washington	33 min
Aug 23, 7:34 PM EDT	Special Weather Statement	FFC	Wilkinson	26 min
Aug 23, 7:37 PM EDT	Severe Thunderstorm Warning	FFC	Johnson, Laurens, Washington, Wilkinson	38 min
Aug 23, 7:46 PM EDT	Special Weather Statement	FFC	Catoosa, Dade, Walker	59 min
Aug 23, 7:49 PM EDT	Special Weather Statement	FFC	Peach	26 min

Nearby

Flash Flood Warnings in Georgia, 2013 Every 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.