Alert archive / Georgia / Flash Flood Warnings in 2020
Flash Flood Warning 70, NWS Atlanta, GA
NWS Atlanta, GA issued this flash flood warning at Nov 12, 2020, 1:37 AM EST for Towns County, White County, Georgia. It was in force for 5 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
- Nov 12, 2020, 1:37 AM EST (06:37 UTC)
- Expired
- Nov 12, 2020, 6:24 AM EST
- In force
- 5 hr
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Towns County, GA, White County, GA
The radar
The Greer radar (KGSP), 133 km from the middle of the area, began a volume at 06:38 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, 6.6 hours before the alert went out and 181 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
- 410 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 759 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
318
WGUS52 KFFC 120637
FFWFFC
GAC281-311-121245-
/O.NEW.KFFC.FF.W.0070.201112T0637Z-201112T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
137 AM EST Thu Nov 12 2020
The National Weather Service in Peachtree City has issued a
* Flash Flood Warning for...
Southeastern Towns County in northeastern Georgia...
North Central White County in northeastern Georgia...
* Until 745 AM EST Thursday.
* At 137 AM EST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 3 inches of rain
have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flash flooding include...
Mountain Scene and Blue Mountain Shelter.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3479 8378 3482 8378 3482 8379 3494 8367
3495 8359 3494 8359 3493 8360 3492 8359
3490 8363 3489 8363 3489 8364 3488 8366
3485 8366 3482 8365 3479 8368 3479 8367
3478 8365 3477 8375 3479 8379
FLASH FLOOD...RADAR INDICATED
$$1 follow-up statement
960
WGUS72 KFFC 121124
FFSFFC
Flash Flood Statement
National Weather Service Peachtree City GA
624 AM EST Thu Nov 12 2020
GAC281-311-121134-
/O.CAN.KFFC.FF.W.0070.000000T0000Z-201112T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Towns GA-White GA-
624 AM EST Thu Nov 12 2020
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN TOWNS AND NORTH
CENTRAL WHITE COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3479 8378 3482 8378 3482 8379 3494 8367
3495 8359 3494 8359 3493 8360 3492 8359
3490 8363 3489 8363 3489 8364 3488 8366
3485 8366 3482 8365 3479 8368 3479 8367
3478 8365 3477 8375 3479 8379
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 11, 10:35 PM EST | Flash Flood Warning | FFC | DeKalb, Fulton, Gwinnett | 6 hr |
| Nov 12, 12:05 AM EST | River Flood Warning | FFC | Forsyth, Fulton | 6 hr |
| Nov 12, 12:20 AM EST | Special Weather Statement | FFC | Towns, Union, White | 40 min |
| Nov 12, 3:49 AM EST | Special Weather Statement | FFC | Houston, Twiggs | 41 min |
| Nov 12, 4:13 AM EST | Flash Flood Warning | FFC | Greene, Oglethorpe, Putnam | 6 hr |
| Nov 12, 4:16 AM EST | Flash Flood Warning | FFC | Houston | 6 hr |
| Nov 12, 4:27 AM EST | River Flood Warning | FFC | Forsyth | 7 hr |
| Nov 12, 5:24 AM EST | Flash Flood Warning | FFC | Baldwin, Hancock | 6 hr |
| Nov 12, 6:01 AM EST | Flash Flood Warning | FFC | Taliaferro, Warren, Wilkes | 6 hr |
| Nov 12, 6:03 AM EST | Flash Flood Watch | FFC | Baldwin, Glascock, Hancock, Jefferson, Taliaferro, Warren and 3 more | 5 hr |
| Nov 12, 6:40 AM EST | River Flood Warning | FFC | Forsyth, Fulton | 30 hr |
Nearby
Flash Flood Warnings in Georgia, 2020Every flash flood warning in 2020
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.