Alert archive / Georgia / Flash Flood Watches in 2017
Flash Flood Watch 3, NWS Atlanta, GA
NWS Atlanta, GA issued this flash flood watch at May 21, 2017, 4:03 AM EDT for 4 counties in Georgia. It was in force for 11 hr.
The area
The counties it named.
The facts
- Issued
- May 21, 2017, 4:03 AM EDT (08:03 UTC)
- Expired
- May 21, 2017, 3:09 PM EDT
- In force
- 11 hr
- Issued by
- NWS Atlanta, GA
- Flood severity
- None
Counties Lumpkin County, GA, Towns County, GA, Union County, GA, White County, GA
The radar
The Greer radar (KGSP), 151 km from the middle of the area, began a volume at 08:05 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 00:00Z, 8.1 hours before the alert went out and 163 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
- 86 J/kg
- Mixed-layer CIN
- -265 J/kg
- Mixed-layer LCL
- 1583 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
753 WGUS62 KFFC 210803 FFAFFC URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Peachtree City GA 403 AM EDT Sun May 21 2017 GAZ008-009-015-016-220000- /O.NEW.KFFC.FF.A.0003.170521T0803Z-170522T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Union-Towns-Lumpkin-White- Including the cities of Dahlonega and Cleveland 403 AM EDT Sun May 21 2017 ...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING... The National Weather Service in Peachtree City has issued a * Flash Flood Watch for portions of north central Georgia and northeast Georgia...including the following areas...in north central Georgia...Lumpkin and Union. In northeast Georgia... Towns and White. * Through this evening * Abundant moisture combined with an upper level storm system will lead to widespread showers and thunderstorms today. Heavy rain will be possible at times over the watch area...especially this morning through early afternoon. 1 to 2 inches has already fallen over portions of Lumpkin county with around an inch elsewhere. Additional rainfall amounts of 1 to 2 inches are possible today. * Flooding in low lying and flood prone areas will be likely, especially in urban areas and the Interstate 20 corridor. In addition, creeks, streams and rivers may overflow their banks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
2 follow-up statements
214 WGUS62 KFFC 211427 FFAFFC Flood Watch National Weather Service Peachtree City GA 1027 AM EDT Sun May 21 2017 GAZ008-009-015-016-212230- /O.CON.KFFC.FF.A.0003.000000T0000Z-170522T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Union-Towns-Lumpkin-White- Including the cities of Dahlonega and Cleveland 1027 AM EDT Sun May 21 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... The Flash Flood Watch continues for * Portions of north central Georgia and northeast Georgia... including the following areas...in north central Georgia... Lumpkin and Union. In northeast Georgia...Towns and White. * Until 8 PM EDT this evening * Abundant moisture combined with an upper level storm system will lead to widespread showers and thunderstorms today. Heavy rain will be possible at times over the watch area... especially this morning through early afternoon. 1 to 2 inches has already fallen over portions of Lumpkin county with around an inch elsewhere. Additional rainfall amounts of 1 to 2 inches are possible today. * Flooding in low lying and flood prone areas will be likely, especially in urban areas and the Interstate 20 corridor. In addition, creeks, streams and rivers may overflow their banks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
294 WGUS62 KFFC 211909 FFAFFC Flood Watch National Weather Service Peachtree City GA 309 PM EDT Sun May 21 2017 GAZ008-009-015-016-212015- /O.CAN.KFFC.FF.A.0003.000000T0000Z-170522T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Union-Towns-Lumpkin-White- Including the cities of Dahlonega and Cleveland 309 PM EDT Sun May 21 2017 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of north central Georgia and northeast Georgia has been cancelled. Rainfall rates have lessened considerably and the heaviest activity has moved off to the east. $$
The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 8:15 PM EDT | Special Weather Statement | FFC | Catoosa, Walker | 30 min |
| May 20, 8:18 PM EDT | Special Weather Statement | FFC | Gordon | 27 min |
| May 20, 8:40 PM EDT | Special Weather Statement | FFC | Whitfield | 35 min |
| May 20, 9:11 PM EDT | Areal Flood Warning | FFC | Whitfield | 6 hr |
| May 21, 12:31 AM EDT | Special Weather Statement | FFC | Clayton, Cobb, DeKalb, Fayette, Forsyth, Fulton and 1 more | 44 min |
| May 21, 1:32 AM EDT | Special Weather Statement | FFC | Barrow, DeKalb, Forsyth, Gwinnett, Rockdale | 43 min |
| May 21, 2:18 AM EDT | Special Weather Statement | FFC | Banks, Barrow, Gwinnett, Hall, Jackson, Newton and 2 more | 42 min |
| May 21, 2:19 AM EDT | Special Weather Statement | FFC | Heard, Troup | 26 min |
| May 21, 2:58 AM EDT | Special Weather Statement | FFC | Carroll, Coweta, Heard, Meriwether, Troup | 47 min |
| May 21, 3:02 AM EDT | Special Weather Statement | FFC | Banks, Barrow, Butts, Clarke, Jackson, Jasper and 4 more | 58 min |
Nearby
Flash Flood Watches in Georgia, 2017Every flash flood watch in 2017
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.