Ample moisture from Tropical Storm/Hurricane Eta to the south over the Gulf of Mexico, marginal instability and moderate shear combined to produce isolated wind damage and flooding across portions of north and central Georgia ahead of a cold front sweeping through the region.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS FFC wrote it up.
Ample moisture from Tropical Storm/Hurricane Eta to the south over the Gulf of Mexico, marginal instability and moderate shear combined to produce isolated wind damage and flooding across portions of north and central Georgia ahead of a cold front sweeping through the region.
The local office's own words before the first event, 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 the first event at Nov 11, 6:40 AM EST, 3 hours 20 minutes earlier.
Area Forecast Discussion National Weather Service Peachtree City GA 640 AM EST Wed Nov 11 2020 ...12Z Aviation Forecast Discussion... .PREV DISCUSSION... /Issued 325 AM EST Wed Nov 11 2020/ SHORT TERM /Today through Thursday/... Today will be the wettest day of the week as an incoming cold front interacts with deep tropical moisture. Early this morning, only scattered light rain showers are affecting the area. Coverage will increase through the day, particularly by this afternoon and evening as the aforementioned cold front pushes into the forecast area. Given the anomalously deep moisture drawn northward into the area from Tropical Storm Eta in the Gulf, locally heavy rainfall rates can be expected. With widespread cloud cover, instability will be marginal, though sufficient for a few embedded thunderstorms ahead of the front. As the front progresses southeastward, rain will gradually end across north Georgia through the morning Thursday. Meanwhile, Eta will be lifted toward the Tampa metro/Big Bend region of Florida through the day Thursday. The main impact locally will continue to be enhanced moisture ahead of the front in southeastern portions of the area through Thursday afternoon where rainfall totals could locally approach 2". Otherwise, no direct impacts will be felt in our area as Eta gets swept into the northern Florida peninsula and tracks well to our south. Temperatures will remain well above normal today and Thursday. The forecast highs at Atlanta and Macon this afternoon are within a degree of the daily record highs, so there is some potential for a record high or two today. RW LONG TERM /Thursday Night through Tuesday/... The long term portion begins with the remnants of a departing tropical system off the NE Florida coast per the latest long term guidance and NHC official track. Although the models are in better agreement, still some uncertainty inherent in the forecast and warrants keeping chance pops in for the SE portion of the forecast area. Instability is barely hanging on during this time period and will also include a narrow sliver of TS in the grids. It should be noted however that if global model trends continue, it may very well be completely dry by this time period. A nice break in the wake of ETA with high pressure building in over the Ohio Valley with ridging through the deep south including the local area. In fact, next few fronts look to be dry ones now as moisture slides north of the area through Sunday and will be adjusting pops downward for this time period. A more significant front in store for Monday with slightly more moisture to work with, especially as indicated by the GFS. Still though, front dries out quickly and very little if any pops anticipated from the Atlanta metro to points southward. Even with a 1030 plus high building in its wake over the western most Mississippi, local area is still unable to get temps below climo with mid 60s expected for highs. Deese && .AVIATION... 12Z Update... Widespread LIFR cigs and LIFR/IFR vsbys at ATL/AHN sites this morning with patchy IFR to MVFR cigs elsewhere. Gradual improvement to IFR cigs and MVFR vsbys initially expected 13-15z. Further improvement to MVFR cigs expected by 16-18z and potential for at least low-end VFR after 20-22z before deteriorating again, especially after 02-04z. Scattered morning shra will become more widespread after 18z with some potential for at least isolated tsra maximized between 20-00z. SE winds 3-6kts today become light and vrb after 00z and then NW 3-6kts after 06-08z Thursday. //ATL Confidence...12Z Update... Medium confidence. RW && .PRELIMINARY POINT TEMPS/POPS... Athens 77 67 78 60 / 80 80 50 20 Atlanta 77 64 75 57 / 90 80 30 10 Blairsville 74 59 72 52 / 80 80 30 10 Cartersville 79 60 74 53 / 80 70 20 5 Columbus 80 68 80 59 / 80 70 30 20 Gainesville 75 65 76 58 / 90 90 40 10 Macon 81 68 80 60 / 80 70 50 30 Rome 79 59 75 51 / 80 70 10 5 Peachtree City 77 64 77 56 / 90 80 30 10 Vidalia 82 72 78 67 / 50 70 90 40 && .FFC WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...RW LONG TERM....Deese AVIATION...RW
Hazardous Weather Outlook National Weather Service Peachtree City GA 512 AM EST Wed Nov 11 2020 GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086- 089>098-102>113-121015- 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- 512 AM EST Wed Nov 11 2020 This Hazardous Weather Outlook is for portions of North and Central Georgia. .DAY ONE...Today and Tonight... Patchy dense fog this morning will lead to reduced visibility and motorists should allow extra time to reach their destination. Tropical moisture will continue to increase through today leading to periods of showers and isolated thunderstorms. A few thunderstorms could produce gusty winds but the primary threats will be locally heavy rain which could lead to isolated flooding. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday... The focus for locally heavy rainfall will shift to Central GA on Thursday as the tropical moisture pulls out from NW to SE during the course of the day. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed through tonight.
The Atlanta radar (KFFC), 98 km away, was scanning. The volume nearest the first event began at 14:58 UTC.
4 flash flood, 3 thunderstorm wind. Local standard time, as filed.
The Gwinnett County Emergency Manager reported trees blown down around Hamilton Mill Road and I-85.
The Emergency Manager reported water flowing over White Road and other nearby roadways due to rising water from neighboring creeks. Several fields and pastures were also inundated. Radar estimates indicate that 1.5 to 2.5 inches of rain fell quickly over the area, causing the flash flooding.
The Dawson County Emergency Manager reported trees and power lines blown down from Stegall Place in the Dawsonville area to The Elliot Family Parkway and Greenway Road around Juno.
A trained spotter reported 2 large limbs blown down on Russell Parkway eastbound just west of Highway 247.
The Emergency Manager reported flooding near the intersection of Edwards Street and Coombs Avenue. Radar estimates indicate that 4 to 6 inches of rain occurred in the area, producing the flash flooding.
The Emergency Manager reported flooding along Ivey Drive, resulting in its closure. Radar estimates indicate that 4 to 6 inches of rain occurred in the area, producing the flash flooding.
The Emergency Manager reported flooding on Cut Thru Road due to high water conditions in Little Rocky Creek. Radar estimates indicate that 4 to 6 inches of rain occurred over the area, producing excessive runoff and resulting in the flash flooding.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Georgia in 2020Every state in 2020This day in weather historyWarnings in Georgia, November 2020
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 929266, 930680, 929267, 929268, 930683, 930684, 930685.