Alert archive / Georgia / Flash Flood Watches in 2012
Flash Flood Watch 1, NWS Atlanta, GA
NWS Atlanta, GA issued this flash flood watch at Jan 21, 2012, 11:07 AM EST for 19 counties in Georgia. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Jan 21, 2012, 11:07 AM EST (16:07 UTC)
- Expired
- Jan 21, 2012, 2:38 PM EST
- In force
- 4 hr
- Issued by
- NWS Atlanta, GA
- Flood severity
- None
Counties Barrow County, GA, Carroll County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, DeKalb County, GA, Douglas County, GA, Fayette County, GA, Forsyth County, GA, Fulton County, GA, Gwinnett County, GA, Haralson County, GA, Heard County, GA, Henry County, GA, Newton County, GA, Paulding County, GA, Rockdale County, GA, Spalding County, GA, Walton County, GA
The radar
The Atlanta radar (KFFC), 38 km from the middle of the area, began a volume at 16:07 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, 4.1 hours before the alert went out and 36 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
- 238 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 505 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 265 m²/s²
- 0-3 km storm-relative helicity
- 291 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.4
The text
As transmitted, in the capitals the NWS used until 2016.
737 WGUS62 KFFC 211607 FFAFFC URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE PEACHTREE CITY GA 1107 AM EST SAT JAN 21 2012 GAZ001>005-011-211715- /O.CAN.KFFC.FA.A.0001.000000T0000Z-120122T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DADE-WALKER-CATOOSA-WHITFIELD-MURRAY-CHATTOOGA- 1107 AM EST SAT JAN 21 2012 ...FLOOD WATCH IS CANCELLED... THE FLOOD WATCH FOR A PORTION OF NORTHWEST GEORGIA HAS BEEN CANCELLED. THE RAIN HAS TAPERED OFF THIS MORNING AND THE THREAT FOR HEAVY RAIN AND FLOODING HAS ENDED. $$ GAZ022-031>035-041>048-052>057-220000- /O.NEW.KFFC.FF.A.0001.120121T1607Z-120122T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ FORSYTH-PAULDING-COBB-NORTH FULTON-GWINNETT-BARROW-HARALSON- CARROLL-DOUGLAS-SOUTH FULTON-DEKALB-ROCKDALE-WALTON-NEWTON-HEARD- COWETA-FAYETTE-CLAYTON-SPALDING-HENRY- INCLUDING THE CITIES OF...MARIETTA...ATLANTA...LAWRENCEVILLE... CARROLLTON...DOUGLASVILLE...EAST POINT...DECATUR...CONYERS... COVINGTON...NEWNAN...PEACHTREE CITY...GRIFFIN 1107 AM EST SAT JAN 21 2012 ...FLASH FLOOD WATCH IN EFFECT UNTIL 7 PM EST THIS EVENING... THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF NORTH CENTRAL GEORGIA... NORTHWEST GEORGIA AND WEST CENTRAL GEORGIA. * UNTIL 7 PM EST THIS EVENING * RAINFALL AMOUNTS OF 1 TO 3 INCHES HAS FALLEN OVER PARTS OF WESTCENTRAL GEORGIA AND THE ATLANTA METRO AREA. ANOTHER LINE OF SHOWERS AND THUNDERSTORMS IS EXPECTED TO AFFECT MUCH OF THIS AREA AGAIN TODAY WITH AN ADDITIONAL 1 TO 3 INCHES OF RAIN POSSIBLE. SOME MINOR FLOODING HAS ALREADY BEEN REPORTED. * HEAVY RAIN WILL CAUSE RAPID RISES AND MINOR FLOODING OF SMALLER CREEKS AND STREAMS. ROADWAYS MAY BECOME COVERED WITH FLOWING WATER. URBAN AREAS WILL ALSO SEE FLOODING...ESPECIALLY IN POOR DRAINAGE AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. NEVER DRIVE INTO FLOODED AREAS. TURN AROUND AND DONT DROWN. MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD ADDITIONAL FLASH FLOOD WARNINGS BE ISSUED. && $$
2 follow-up statements
676 WGUS62 KFFC 211900 FFAFFC FLOOD WATCH NATIONAL WEATHER SERVICE PEACHTREE CITY GA 200 PM EST SAT JAN 21 2012 GAZ022-031-032-034-035-041>043-047-212000- /O.CAN.KFFC.FF.A.0001.000000T0000Z-120122T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ FORSYTH-PAULDING-COBB-GWINNETT-BARROW-HARALSON-CARROLL-DOUGLAS- WALTON- INCLUDING THE CITIES OF...MARIETTA...LAWRENCEVILLE...CARROLLTON... DOUGLASVILLE 200 PM EST SAT JAN 21 2012 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF NORTH CENTRAL GEORGIA AND NORTHWEST GEORGIA HAS BEEN CANCELLED. RAIN HAS TAPERED OFF AND BASED ON THE AMOUNT OF RANI THAT FELL...THE THREAT FOR FLOODING HAS DIMINISHED. $$ GAZ033-044>046-048-052>057-220000- /O.CON.KFFC.FF.A.0001.000000T0000Z-120122T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NORTH FULTON-SOUTH FULTON-DEKALB-ROCKDALE-NEWTON-HEARD-COWETA- FAYETTE-CLAYTON-SPALDING-HENRY- INCLUDING THE CITIES OF...ATLANTA...EAST POINT...DECATUR... CONYERS...COVINGTON...NEWNAN...PEACHTREE CITY...GRIFFIN 200 PM EST SAT JAN 21 2012 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 7 PM EST THIS EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NORTH CENTRAL GEORGIA AND WEST CENTRAL GEORGIA. * UNTIL 7 PM EST THIS EVENING * RAINFALL AMOUNTS OF 1 TO 4 INCHES HAS FALLEN OVER PARTS OF WESTCENTRAL GEORGIA AND THE ATLANTA METRO AREA. AN ADDITIONAL ONE HALF TO ONE INCH OF RAIN REMAINS POSSIBLE. EVEN AFTER THE RAIN TAPERS OFF...RUNOFF FROM THE PREVIOUS HEAVY RAIN WILL CONTINUE TO CAUSE RISES IN CREEKS AND STREAMS. SEVERAL CREEKS AND RIVERS ARE ALREADY OUT OF THEIR BANKS. * HEAVY RAIN WILL CAUSE RAPID RISES AND MINOR FLOODING OF SMALLER CREEKS AND STREAMS. ROADWAYS MAY BECOME COVERED WITH FLOWING WATER. URBAN AREAS WILL ALSO SEE FLOODING... ESPECIALLY IN POOR DRAINAGE AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. NEVER DRIVE INTO FLOODED AREAS. TURN AROUND AND DONT DROWN. NEVER PLAY IN FLOODED AREAS. DRAINAGE PIPES AND WATERWAYS CAN BE UNDERWATER AND IMPOSSIBLE TO SEE AND COULD CAUSE AN INDIVIDUAL TO BE TRAPPED QUICKLY. MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD ADDITIONAL FLASH FLOOD WARNINGS BE ISSUED. && $$
416 WGUS62 KFFC 211938 FFAFFC FLOOD WATCH NATIONAL WEATHER SERVICE PEACHTREE CITY GA 238 PM EST SAT JAN 21 2012 GAZ033-044>046-048-052>057-212045- /O.CAN.KFFC.FF.A.0001.000000T0000Z-120122T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NORTH FULTON-SOUTH FULTON-DEKALB-ROCKDALE-NEWTON-HEARD-COWETA- FAYETTE-CLAYTON-SPALDING-HENRY- INCLUDING THE CITIES OF...ATLANTA...EAST POINT...DECATUR... CONYERS...COVINGTON...NEWNAN...PEACHTREE CITY...GRIFFIN 238 PM EST SAT JAN 21 2012 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF NORTH CENTRAL GEORGIA AND WEST CENTRAL GEORGIA HAS BEEN CANCELLED. RAIN HAS TAPERED OFF AND BASED ON THE AMOUNT OF RAIN THAT FELL...THE THREAT FOR FLOODING HAS ENDED. $$
The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 21, 7:19 AM EST | Special Weather Statement | FFC | Carroll, Douglas, Fulton | 41 min |
| Jan 21, 8:00 AM EST | Special Weather Statement | FFC | Carroll, Douglas, Fulton | 45 min |
| Jan 21, 8:18 AM EST | Special Weather Statement | FFC | Murray | 27 min |
| Jan 21, 8:43 AM EST | Special Weather Statement | FFC | Douglas, Newton, Rockdale | 47 min |
| Jan 21, 8:56 AM EST | Special Weather Statement | FFC | Chattooga, Gordon, Murray, Whitfield | 34 min |
| Jan 21, 9:27 AM EST | Special Weather Statement | FFC | Fannin, Union | 33 min |
| Jan 21, 9:47 AM EST | Special Weather Statement | FFC | Floyd | 43 min |
| Jan 21, 10:04 AM EST | Special Weather Statement | FFC | Carroll, Douglas, Fulton | 41 min |
| Jan 21, 10:19 AM EST | Flash Flood Warning | FFC | Carroll, Douglas | 4 hr |
| Jan 21, 10:22 AM EST | Severe Thunderstorm Warning | FFC | DeKalb, Fulton | 38 min |
| Jan 21, 10:24 AM EST | Special Weather Statement | FFC | Dawson | 36 min |
| Jan 21, 10:43 AM EST | Special Weather Statement | FFC | Forsyth, Hall | 32 min |
| Jan 21, 10:50 AM EST | Flash Flood Warning | FFC | DeKalb, Fulton | 5 hr |
| Jan 21, 10:50 AM EST | Special Weather Statement | FFC | DeKalb, Rockdale, Walton | 40 min |
| Jan 21, 10:59 AM EST | Severe Thunderstorm Warning | FFC | Haralson, Paulding | 46 min |
| Jan 21, 11:22 AM EST | Severe Thunderstorm Warning | FFC | Cobb, DeKalb, Fulton | 38 min |
| Jan 21, 11:27 AM EST | Special Weather Statement | FFC | Banks, Jackson, Madison | 33 min |
| Jan 21, 11:28 AM EST | Special Weather Statement | FFC | Carroll, Douglas, Fulton | 47 min |
| Jan 21, 11:32 AM EST | Special Weather Statement | FFC | Oconee, Walton | 28 min |
| Jan 21, 11:32 AM EST | Severe Thunderstorm Warning | FFC | Carroll, Douglas, Fulton | 28 min |
| Jan 21, 11:34 AM EST | Tornado Warning | FFC | Coweta, Heard | 41 min |
| Jan 21, 11:44 AM EST | Severe Thunderstorm Warning | FFC | Clarke, Greene, Morgan, Oconee, Oglethorpe, Walton | 46 min |
| Jan 21, 11:57 AM EST | Special Weather Statement | FFC | Meriwether, Troup | 33 min |
| Jan 21, 12:04 PM EST | Flash Flood Warning | FFC | Clayton | 2 hr |
| Jan 21, 12:16 PM EST | Tornado Warning | FFC | Coweta, Fayette | 28 min |
| Jan 21, 12:26 PM EST | Severe Thunderstorm Warning | FFC | Lamar, Meriwether, Pike, Upson | 49 min |
| Jan 21, 12:29 PM EST | Special Weather Statement | FFC | Oglethorpe, Wilkes | 46 min |
| Jan 21, 12:38 PM EST | Severe Thunderstorm Warning | FFC | Butts, Clayton, Henry, Spalding | 52 min |
| Jan 21, 12:43 PM EST | Special Weather Statement | FFC | Morgan | 32 min |
| Jan 21, 1:00 PM EST | Severe Thunderstorm Warning | FFC | Bibb, Jones, Lamar, Monroe, Upson | 45 min |
| Jan 21, 1:05 PM EST | Severe Thunderstorm Warning | FFC | Jasper, Newton | 40 min |
| Jan 21, 1:11 PM EST | Special Weather Statement | FFC | Harris | 34 min |
| Jan 21, 1:20 PM EST | Tornado Warning | FFC | Harris | 40 min |
| Jan 21, 1:30 PM EST | Special Weather Statement | FFC | Upson | 30 min |
| Jan 21, 1:44 PM EST | Severe Thunderstorm Warning | FFC | Baldwin, Hancock, Jasper, Jones, Putnam, Washington and 1 more | 46 min |
| Jan 21, 1:57 PM EST | Tornado Warning | FFC | Talbot | 32 min |
| Jan 21, 1:59 PM EST | Special Weather Statement | FFC | Muscogee | 31 min |
| Jan 21, 2:05 PM EST | Severe Thunderstorm Warning | FFC | Harris, Muscogee | 25 min |
| Jan 21, 2:14 PM EST | Severe Thunderstorm Warning | FFC | Upson | 34 min |
| Jan 21, 2:21 PM EST | Tornado Warning | FFC | Baldwin, Hancock, Washington, Wilkinson | 39 min |
| Jan 21, 2:27 PM EST | Severe Thunderstorm Warning | FFC | Bibb, Crawford, Peach, Taylor | 48 min |
| Jan 21, 2:32 PM EST | Special Weather Statement | FFC | Taylor | 28 min |
| Jan 21, 2:59 PM EST | Special Weather Statement | FFC | Jefferson, Washington | 31 min |
| Jan 21, 2:59 PM EST | Severe Thunderstorm Warning | FFC | Chattahoochee, Marion, Muscogee, Schley | 46 min |
| Jan 21, 3:06 PM EST | Severe Thunderstorm Warning | FFC | Macon, Taylor | 39 min |
| Jan 21, 3:07 PM EST | Tornado Warning | FFC | Jefferson, Washington | 38 min |
| Jan 21, 3:20 PM EST | Special Weather Statement | FFC | Bleckley, Houston, Peach, Twiggs | 25 min |
| Jan 21, 3:28 PM EST | Tornado Warning | FFC | Macon | 47 min |
| Jan 21, 3:53 PM EST | Tornado Warning | FFC | Dooly, Houston | 37 min |
| Jan 21, 4:00 PM EST | Severe Thunderstorm Warning | FFC | Emanuel, Johnson | 60 min |
| Jan 21, 4:02 PM EST | Severe Thunderstorm Warning | FFC | Chattahoochee, Marion | 43 min |
| Jan 21, 4:18 PM EST | Severe Thunderstorm Warning | FFC | Pulaski, Wilcox | 42 min |
| Jan 21, 4:27 PM EST | Severe Thunderstorm Warning | FFC | Dooly, Houston | 18 min |
| Jan 21, 4:29 PM EST | Special Weather Statement | FFC | Stewart | 31 min |
| Jan 21, 4:36 PM EST | Tornado Warning | FFC | Pulaski | 24 min |
| Jan 21, 4:43 PM EST | Severe Thunderstorm Warning | FFC | Stewart, Webster | 62 min |
| Jan 21, 4:49 PM EST | Severe Thunderstorm Warning | FFC | Dodge | 41 min |
| Jan 21, 4:50 PM EST | Severe Thunderstorm Warning | FFC | Marion, Schley, Sumter | 39 min |
| Jan 21, 5:24 PM EST | Special Weather Statement | FFC | Montgomery, Telfair, Wheeler | 66 min |
| Jan 21, 5:27 PM EST | Severe Thunderstorm Warning | FFC | Telfair, Wheeler | 48 min |
| Jan 21, 5:33 PM EST | Severe Thunderstorm Warning | FFC | Dodge, Wilcox | 15 min |
| Jan 21, 5:39 PM EST | Special Weather Statement | FFC | Crisp | 66 min |
| Jan 21, 5:50 PM EST | Special Weather Statement | FFC | Telfair, Wilcox | 40 min |
| Jan 21, 6:12 PM EST | Severe Thunderstorm Warning | FFC | Montgomery, Toombs, Wheeler | 33 min |
Nearby
Flash Flood Watches in Georgia, 2012Every flash flood watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.