Alert archive / Georgia / Flash Flood Warnings in 2008
Flash Flood Warning 11, NWS Atlanta, GA
NWS Atlanta, GA issued this flash flood warning at Aug 26, 2008, 9:21 AM EDT for Cobb County, Georgia. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 26, 2008, 9:21 AM EDT (13:21 UTC)
- Expired
- Aug 26, 2008, 1:25 PM EDT
- In force
- 4 hr
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Flood severity
- None
County Cobb County, GA
The radar
The Atlanta radar (KFFC), 69 km from the middle of the area, began a volume at 13:24 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.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 1.4 hours before the alert went out and 69 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.
- Mixed-layer CAPE
- 825 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 459 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 348 m²/s²
- 0-3 km storm-relative helicity
- 373 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 13.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS52 KFFC 261321 FFWFFC GAC067-261915- /O.NEW.KFFC.FF.W.0011.080826T1321Z-080826T1915Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PEACHTREE CITY GA 921 AM EDT TUE AUG 26 2008 THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A * FLASH FLOOD WARNING FOR... WESTERN COBB COUNTY IN NORTH CENTRAL GEORGIA * UNTIL 315 PM EDT * AT 910 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 1.5 TO 2 INCHES OF RAIN HAS FALLEN OVER WESTERN COBB COUNTY SINCE 3 AM EDT. FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO POWDER SPRINGS...MARIETTA...KENNESAW...FAIR OAKS...AUSTELL AND ACWORTH. ADDITIONAL RAINFALL AMOUNTS OF 1 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 UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. HIGH WATERS ARE MOVING DOWN ALLATOONA CREEK NEAR MARS HILL. THE STAGE HEIGHT WAS 11.7 FEET AND RISING. FLOOD STAGE IS 13 FEET. THE CREEK SHOULD CREST BETWEEN 13 AND 14 FEET AROUND NOON. IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6. LAT...LON 3408 8472 3408 8454 3381 8455 3383 8472 $$ 16
4 follow-up statements
000 WGUS72 KFFC 261359 FFSFFC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PEACHTREE CITY GA 959 AM EDT TUE AUG 26 2008 GAC067-261915- /O.CON.KFFC.FF.W.0011.000000T0000Z-080826T1915Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ COBB GA- 959 AM EDT TUE AUG 26 2008 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM EDT FOR WESTERN COBB COUNTY... AT 952 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED LIGHT TO MODERATE RAIN OVER THE WARNED AREA. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO KENNESAW AND ACWORTH. ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE OVER THE WARNED AREA THROUGH 315 PM EDT. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...AS WELL AS HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. HIGH WATERS ARE MOVING DOWN ALLATOONA CREEK NEAR MARS HILL. THE STAGE HEIGHT WAS 12.1 FEET AND RISING AT 915 AM EDT. FLOOD STAGE IS 13 FEET. THE CREEK SHOULD CREST BETWEEN 13 AND 14 FEET AROUND NOON. IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6. LAT...LON 3408 8472 3408 8454 3381 8455 3383 8472 $$ 16
000 WGUS72 KFFC 261612 FFSFFC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PEACHTREE CITY GA 1212 PM EDT TUE AUG 26 2008 GAC067-261915- /O.CON.KFFC.FF.W.0011.000000T0000Z-080826T1915Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ COBB GA- 1212 PM EDT TUE AUG 26 2008 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM EDT FOR WESTERN COBB COUNTY... AT 1202 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED LIGHT TO MODERATE RAIN MOVING NORTHEAST AT 30 MPH OUT OF THE WARNED AREA. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO KENNESAW AND ACWORTH. ADDITIONAL RAINFALL AMOUNTS ARE POSSIBLE WITH DEVELOPING SCATTERED SHOWERS IN EAST CENTRAL ALABAMA THROUGH 315 PM EDT. EXCESSIVE RUNOFF FROM PREVIOUS HEAVY RAINFALL MAY BE CAUSING 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. HIGH WATER CONTINUES ON ALLATOONA CREEK AT STILESBORO ROAD NEAR MARS HILL AND ACWORTH. THE STAGE HEIGHT WAS 9.2 FEET AND FALLING AT 1115 AM EDT. FLOOD STAGE IS 13 FEET. THE CREEK CRESTED AROUND 12.5 FEET AT 945 AM EDT. IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6. LAT...LON 3408 8472 3408 8454 3381 8455 3383 8472 $$ 16
000 WGUS72 KFFC 261714 FFSFFC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PEACHTREE CITY GA 114 PM EDT TUE AUG 26 2008 GAC067-261713- /O.CAN.KFFC.FF.W.0011.000000T0000Z-080826T1915Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ COBB GA- 114 PM EDT TUE AUG 26 2008 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR WESTERN COBB COUNTY... THE RAIN MOVED OUT OF THE WARNED AREA AROUND 1230 PM EDT. THERE WILL BE A 1 TO 2 HOUR BREAK BEFORE SCATTERED SHOWERS AND POSSIBLE THUNDERSTORMS MOVE BACK INTO WESTERN COBB COUNTY THIS AFTERNOON. ALLATOONA CREEK AT STILESBORO ROAD NEAR MARS HILL AND ACWORTH CRESTED AROUND 12.5 FEET AT 945 AM EDT THIS MORNING. FLOOD STAGE IS 13 FEET. THE STAGE HEIGHT WAS 8.2 FEET AND FALLING AT 1215 PM EDT. A COBB COUNTY EMA OFFICIAL INDICATED NO ADDITIONAL FLOODING WAS OCCURRING. IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6. LAT...LON 3408 8472 3408 8454 3381 8455 3383 8472 $$ 16
000 WGUS72 KFFC 261725 CCA FFSFFC FLASH FLOOD STATEMENT...CORRECTION TO EXPIRATION TIME NATIONAL WEATHER SERVICE PEACHTREE CITY GA 125 PM EDT TUE AUG 26 2008 GAC067-261745- /O.CAN.KFFC.FF.W.0011.000000T0000Z-080826T1915Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ COBB GA- 125 PM EDT TUE AUG 26 2008 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR WESTERN COBB COUNTY... THE RAIN MOVED OUT OF THE WARNED AREA AROUND 1230 PM EDT. THERE WILL BE A 1 TO 2 HOUR BREAK BEFORE SCATTERED SHOWERS AND POSSIBLE THUNDERSTORMS MOVE BACK INTO WESTERN COBB COUNTY THIS AFTERNOON. ALLATOONA CREEK AT STILESBORO ROAD NEAR MARS HILL AND ACWORTH CRESTED AROUND 12.5 FEET AT 945 AM EDT THIS MORNING. FLOOD STAGE IS 13 FEET. THE STAGE HEIGHT WAS 8.2 FEET AND FALLING AT 1215 PM EDT. A COBB COUNTY EMA OFFICIAL INDICATED NO ADDITIONAL FLOODING WAS OCCURRING. IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6. LAT...LON 3408 8472 3408 8454 3381 8455 3383 8472 $$ 16
The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 10:45 PM EDT | Tornado Warning | FFC | Oglethorpe, Wilkes | 30 min |
| Aug 25, 11:08 PM EDT | Tornado Warning | FFC | Wilkes | 52 min |
| Aug 25, 11:56 PM EDT | Tornado Warning | FFC | Bibb, Houston, Twiggs | 49 min |
| Aug 26, 12:01 AM EDT | Tornado Warning | FFC | Barrow, Gwinnett, Oconee, Walton | 44 min |
| Aug 26, 8:09 AM EDT | Tornado Warning | FFC | Cobb, DeKalb, Fulton | 36 min |
| Aug 26, 9:31 AM EDT | Tornado Warning | FFC | Talbot, Taylor, Upson | 44 min |
| Aug 26, 9:59 AM EDT | Tornado Warning | FFC | Lamar | 22 min |
| Aug 26, 11:34 AM EDT | Tornado Warning | FFC | Crawford, Monroe | 41 min |
| Aug 26, 12:04 PM EDT | Tornado Warning | FFC | Jasper, Jones | 41 min |
| Aug 26, 12:28 PM EDT | Tornado Warning | FFC | Crisp | 47 min |
| Aug 26, 12:40 PM EDT | Flash Flood Warning | FFC | Lumpkin, White | 6 hr |
| Aug 26, 12:40 PM EDT | Tornado Warning | FFC | Jasper, Morgan, Putnam | 50 min |
| Aug 26, 1:16 PM EDT | Tornado Warning | FFC | Oconee, Walton | 29 min |
| Aug 26, 1:30 PM EDT | Severe Thunderstorm Warning | FFC | Clarke, Jackson, Madison | 30 min |
| Aug 26, 1:39 PM EDT | Flash Flood Warning | FFC | Towns | 6 hr |
| Aug 26, 2:01 PM EDT | Tornado Warning | FFC | Clarke, Oconee, Oglethorpe | 29 min |
| Aug 26, 2:07 PM EDT | Flash Flood Warning | FFC | Banks, Jackson | 6 hr |
| Aug 26, 3:16 PM EDT | Flash Flood Warning | FFC | Newton, Rockdale | 6 hr |
| Aug 26, 3:28 PM EDT | River Flood Warning | FFC | Forsyth, Fulton | 6 hr |
| Aug 26, 3:49 PM EDT | Tornado Warning | FFC | Hall, White | 41 min |
| Aug 26, 4:08 PM EDT | Tornado Warning | FFC | Barrow, Jackson | 37 min |
| Aug 26, 4:10 PM EDT | Tornado Warning | FFC | Dooly, Houston, Macon, Peach | 50 min |
| Aug 26, 4:36 PM EDT | Tornado Warning | FFC | Banks, Jackson | 24 min |
| Aug 26, 4:55 PM EDT | Tornado Warning | FFC | Greene, Oglethorpe | 50 min |
| Aug 26, 6:02 PM EDT | Tornado Warning | FFC | Greene, Oglethorpe, Taliaferro, Wilkes | 58 min |
| Aug 26, 6:08 PM EDT | Tornado Warning | FFC | Banks, Hall | 37 min |
| Aug 26, 6:24 PM EDT | Tornado Warning | FFC | Baldwin, Jones | 38 min |
| Aug 26, 6:41 PM EDT | Flash Flood Warning | FFC | Lumpkin, White | 6 hr |
| Aug 26, 7:00 PM EDT | Tornado Warning | FFC | Wilkes | 15 min |
| Aug 26, 7:15 PM EDT | Areal Flood Warning | FFC | Hall | 6 hr |
| Aug 26, 7:31 PM EDT | Tornado Warning | FFC | Hancock, Taliaferro, Warren | 44 min |
Nearby
Flash Flood Warnings in Georgia, 2008Every flash flood warning in 2008
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.