Alert archive / Georgia / Flash Flood Warnings in 2026
Flash Flood Warning 74, NWS Atlanta, GA
NWS Atlanta, GA issued this flash flood warning at Sep 12, 2026, 10:23 AM EDT for Cobb County, DeKalb County, Fulton County, Georgia. It was in force for 69 min. 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
- Sep 12, 2026, 10:23 AM EDT (14:23 UTC)
- Expired
- Sep 12, 2026, 11:32 AM EDT
- In force
- 69 min
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Cobb County, GA, DeKalb County, GA, Fulton County, GA
The radar
The Atlanta radar (KFFC), 53 km from the middle of the area, began a volume at 14:22 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 |
|---|---|---|---|
| Sep 12, 10:30 AM EDT | FLASH FLOOD | 1 E Truist Park, GA | Flooding on I-285 Eastbound at I-75 NB. All lanes closed. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this flash flood warning; the first came 7 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 2.4 hours before the alert went out and 52 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
- 347 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 573 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted.
056
WGUS52 KFFC 121423
FFWFFC
GAC067-089-121-121730-
/O.NEW.KFFC.FF.W.0074.260912T1423Z-260912T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
1023 AM EDT Sat Sep 12 2026
The National Weather Service in Peachtree City has issued a
* Flash Flood Warning for...
Southeastern Cobb County in north central Georgia...
West Central DeKalb County in north central Georgia...
Central Fulton County in north central Georgia...
* Until 130 PM EDT.
* At 1023 AM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 3.5 inches of rain
have fallen. Additional rainfall amounts of 2 to 3 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar indicated.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Atlanta, Sandy Springs, Smyrna, Chamblee, North Atlanta, Chastain
Memorial Park, Bolton, Vinings, Atlantic Station, Brookhaven and
Bankhead.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3379 8451 3381 8453 3383 8452 3388 8450
3394 8436 3389 8428 3374 8444
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$1 follow-up statement
281
WGUS72 KFFC 121532
FFSFFC
Flash Flood Statement
National Weather Service Peachtree City GA
1132 AM EDT Sat Sep 12 2026
GAC067-089-121-121542-
/O.CAN.KFFC.FF.W.0074.000000T0000Z-260912T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cobb GA-DeKalb GA-Fulton GA-
1132 AM EDT Sat Sep 12 2026
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN COBB, WEST
CENTRAL DEKALB AND CENTRAL FULTON COUNTIES...
While the heaviest rainfall has moved out of the immediate area,
light rainfall continues. Additional rounds of potentially heavy
rainfall are likely to occur in the area through early evening.
Please continue to heed to any ongoing road closures.
&&
LAT...LON 3379 8451 3381 8453 3383 8452 3388 8450
3394 8436 3389 8428 3374 8444
$$What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Atlanta, GA wrote its last area forecast discussion before this flash flood warning went out at Sep 12, 6:46 AM EDT, 3 hours 37 minutes earlier. Its key messages:
- Isolated showers and thunderstorms are possible through daybreak, becoming scattered to numerous in coverage into the afternoon. Any storms that form will be capable of producing gusty winds, frequent lightning, and locally heavy rainfall.
- Repeated rounds of heavy rainfall will support localized flash flooding concerns today, similar to yesterday. Isolated amounts up to 3 to 4" could fall within an hour or two in the strongest cells.
- Comparatively hot and humid conditions will return from Sunday on, with diminishing rain chances (<20%).
Area forecast discussion, Sep 12, 6:46 AM EDT, 3 hours 37 minutes before
Area Forecast Discussion National Weather Service Peachtree City GA 646 AM EDT Sat Sep 12 2026 ...New 12Z Aviation Discussion... .KEY MESSAGES... - Isolated showers and thunderstorms are possible through daybreak, becoming scattered to numerous in coverage into the afternoon. Any storms that form will be capable of producing gusty winds, frequent lightning, and locally heavy rainfall. - Repeated rounds of heavy rainfall will support localized flash flooding concerns today, similar to yesterday. Isolated amounts up to 3 to 4" could fall within an hour or two in the strongest cells. - Comparatively hot and humid conditions will return from Sunday on, with diminishing rain chances (<20%). && .SHORT TERM... (Today through Sunday) Issued at 240 AM EDT Sat Sep 12 2026 Over the course of the day today, a shortwave traversing otherwise quasi-zonal flow at the mid-levels will clip the state from the northwest. The combination of this and a steady stream of moist, southwesterly flow around the Bermuda High at the surface will support the development of waves of showers and thunderstorms beginning this morning and carrying into the afternoon. Last night's 00Z FFC sounding analyzed PWATs of 2.02" -- well exceeding the 90th percentile climatologically, and perhaps even daily maximums. Overall blanket rainfall totals remain low for today (up to three-quarters of an inch), but a high PWAT environment with chances for training/multiple rounds of heavy rainfall means at least an outside chance for localized flash flooding concerns -- with low predictability on exactly where high value bullseyes occur. Localized amounts up to 5" were recorded yesterday, and with near-negligible changes to our parameter space, isolated amounts of 3-4" and perhaps higher are possible. Notably, these totals could be realized over the course of an hour or two, more than sufficient to overwhelm creeks, streams, and storm drains. Chances for organized severe weather remain low given unremarkable sounding profiles and kinematics, but with saturated soils from yesterday's rainfall (and minimal recovery time in between rounds), cannot rule out isolated reports of downed trees even in sub-severe gusts. Highs will be in the mid-80s to lower 90s today, just a bit lower than yesterday owing to the glancing blow from yesterday's front and increased convective coverage. As mid-level ridging moves in aloft on Sunday, meaningful precipitation chances will be effaced by strengthening subsidence. Isolated thunderstorms are possible across our far southern tier, in the vicinity of a lingering tendril of increased moisture, but most will see a dry (if hot) end to the weekend. && .LONG TERM... (Sunday night through Friday) Issued at 240 AM EDT Sat Sep 12 2026 As the long term period begins on Sunday night, an upper level ridge over the south-central CONUS will be slowly building eastward. This ridge and associated surface high pressure will amplify and set up over the east CONUS during the early parts of next week. Low level moisture from the Gulf will persist across north and central Georgia, though dewpoints are forecast to drop slightly into the upper 60s to low 70s with subsidence of drier air from the mid levels under the ridge. This will also inhibit rain chances, with isolated afternoon thunderstorms being largely confined to south- central Georgia on Monday through Wednesday. Conditions across north and central Georgia are expected to be warmest on Monday, rising into the mid 90s across all but the far northeastern mountains. Heat index values are moreover forecast to climb to between 100-103 degrees in areas south of I-85. The axis of the ridge will begin to shift northeast of the forecast area on Tuesday into Wednesday, with the associated surface high moving over the central Appalachians. As this occurs, it will spread a CAD wedge into portions of northeast Georgia, leading to slightly lower dewpoints and high temperatures in the mid to upper 80s in the far northeast and low 90s elsewhere across the forecast area. Rain chances will remain minimal on Tuesday and Wednesday under the ridge, but will begin to rebound during the late parts of the week as the ridge begins to retrograde back to the west of the area. && .AVIATION... (12Z TAFS) Issued at 644 AM EDT Sat Sep 12 2026 A tricky TAF pd. BKN IFR cigs to linger thru 15-16Z, with pds of TWRINC psbl in absence of SHRA/TSRA. Low cigs likely to be accompanied by MVFR vsbys in BR. Gradual improvement to MVFR by 16-18Z. At minimum VC and likely prevailing -SHRA to continue for several hours, with chcs for isold embd TSRA captured by TEMPO from 11-15Z. Brief lull psbl midday, then a return to chcs for TSRA impacts from 18-24Z before clearing occurs overnight. Winds very nearly due S/at times VRB will pick up out of the SW at 4-8kts. //ATL Confidence...12Z Update... Medium confidence all elements. 96 && .PRELIMINARY POINT TEMPS/POPS... Athens 86 69 91 68 / 80 30 0 0 Atlanta 86 72 91 71 / 80 20 0 0 Blairsville 79 65 84 63 / 80 30 0 0 Cartersville 86 70 91 68 / 60 20 0 0 Columbus 89 72 93 72 / 70 20 0 0 Gainesville 83 70 89 69 / 80 20 0 0 Macon 89 71 92 71 / 80 30 20 0 Rome 87 68 91 67 / 60 20 0 0 Peachtree City 87 70 92 69 / 70 10 0 0 Vidalia 91 73 92 73 / 40 30 10 0 && .FFC WATCHES/WARNINGS/ADVISORIES... None. && SHORT TERM...96 LONG TERM....King AVIATION...96
Hazardous weather outlook, Sep 11, 11:22 PM EDT, 11 hours 1 minute before
Hazardous Weather Outlook National Weather Service Peachtree City GA 1122 PM EDT Fri Sep 11 2026 GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086- 089>098-102>113-130330- Baldwin-Banks-Barrow-Bartow-Bibb-Bleckley-Butts-Carroll-Catoosa- Chattahoochee-Chattooga-Cherokee-Clarke-Clayton-Cobb-Coweta- Crawford-Crisp-Dade-Dawson-DeKalb-Dodge-Dooly-Douglas-Emanuel- Fannin-Fayette-Floyd-Forsyth-Gilmer-Glascock-Gordon-Greene- Gwinnett-Hall-Hancock-Haralson-Harris-Heard-Henry-Houston-Jackson- Jasper-Jefferson-Johnson-Jones-Lamar-Laurens-Lumpkin-Macon- Madison-Marion-Meriwether-Monroe-Montgomery-Morgan-Murray- Muscogee-Newton-North Fulton-Oconee-Oglethorpe-Paulding-Peach- Pickens-Pike-Polk-Pulaski-Putnam-Rockdale-Schley-South Fulton- Spalding-Stewart-Sumter-Talbot-Taliaferro-Taylor-Telfair-Toombs- Towns-Treutlen-Troup-Twiggs-Union-Upson-Walker-Walton-Warren- Washington-Webster-Wheeler-White-Whitfield-Wilcox-Wilkes- Wilkinson- 1122 PM EDT Fri Sep 11 2026 This Hazardous Weather Outlook is for north and central Georgia. .DAY ONE...Tonight... Isolated showers and thunderstorms are possible through the night. Patchy dense fog development is likely as we approach daybreak, especially for areas that received rounds of heavy rainfall today. .DAYS TWO THROUGH SEVEN...Saturday through Thursday... Thunderstorm activity increases and spreads across the area into the weekend. The primary threats in any storms that form are gusty winds, frequent lightning, and locally heavy rainfall. Afternoon heat index values remain into the upper 90s to low 100s each day through early next week. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed through tonight.
In the hours before
Local storm report, Sep 12, 9:12 AM EDT, 1 hour 11 minutes before
Preliminary Local Storm Report
National Weather Service Peachtree City GA
912 AM EDT Sat Sep 12 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0908 AM Flash Flood Villa Rica 33.73N 84.92W
09/12/2026 Carroll GA Public
Street flooding around the 200 Block of
Wilson Mill Dr.
&&
VSSLocal storm report, Sep 12, 10:07 AM EDT, 16 minutes before
Preliminary Local Storm Report
National Weather Service Peachtree City GA
1007 AM EDT Sat Sep 12 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0900 AM Flash Flood Villa Rica 33.73N 84.92W
09/12/2026 Carroll GA Public
Hwy 78 flooded near the 300 block in Villa
Rica.
&&
VSSLocal storm report, Sep 12, 10:10 AM EDT, 13 minutes before
Preliminary Local Storm Report
National Weather Service Peachtree City GA
1010 AM EDT Sat Sep 12 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1000 AM Flash Flood Villa Rica 33.73N 84.92W
09/12/2026 Carroll GA Public
Corrects previous flash flood report from
Villa Rica. Hwy 78 flooded near the 300
block in Villa Rica.
&&
VSSLocal storm report, Sep 12, 10:17 AM EDT, 6 minutes before
Preliminary Local Storm Report
National Weather Service Peachtree City GA
1017 AM EDT Sat Sep 12 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1015 AM Flash Flood Villa Rica 33.73N 84.92W
09/12/2026 Carroll GA Public
Street flooding near the intersection of
Westview Dr and Village Ln.
&&
VSSThe office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 12, 7:21 AM EDT | Flash Flood Warning | FFC | Carroll, Cobb, Douglas, Paulding | 5 hr |
| Sep 12, 9:34 AM EDT | Flash Flood Warning | FFC | Carroll, Douglas | 95 min |
| Sep 12, 9:39 AM EDT | Flash Flood Warning | FFC | Cobb, DeKalb, Douglas, Fulton | 3 hr |
| Sep 12, 12:32 PM EDT | River Flood Warning | FFC | Cobb | 3 hr |
| Sep 12, 3:42 PM EDT | Special Weather Statement | FFC | Laurens | 33 min |
Nearby
Flash Flood Warnings in Georgia, 2026Every flash flood warning in 2026
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.