Alert archive / Georgia / Flash Flood Warnings in 2009
Flash Flood Warning 29, NWS Atlanta, GA
NWS Atlanta, GA issued this flash flood warning at Sep 20, 2009, 6:43 AM EDT for White County, Georgia. It was in force for 6 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
- Sep 20, 2009, 6:43 AM EDT (10:43 UTC)
- Expired
- Sep 20, 2009, 12:45 PM EDT
- In force
- 6 hr
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Flood severity
- None
County White County, GA
The radar
The Greer radar (KGSP), 142 km from the middle of the area, began a volume at 10:46 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, 10.7 hours before the alert went out and 159 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
- 1577 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 548 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 177 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS52 KFFC 201043
FFWFFC
GAC311-201645-
/O.NEW.KFFC.FF.W.0029.090920T1043Z-090920T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
643 AM EDT SUN SEP 20 2009
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
WHITE COUNTY IN NORTHEAST GEORGIA
* UNTIL 1245 PM EDT
* AT 642 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM HEAVY SHOWERS AND THUNDERSTORMS...NORTHEAST
AT 10 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
UNICOI STATE PARK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS...OR WATERS OF UNKNOWN DEPTH...ON FOOT OR IN
AN AUTOMOBILE.
IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.
&&
LAT...LON 3476 8362 3471 8362 3464 8366 3454 8362
3451 8367 3450 8384 3453 8383 3455 8386
3462 8388 3471 8385 3474 8382 3476 8383
3479 8379 3479 8367
$$1 follow-up statement
000
WGUS72 KFFC 201301
FFSFFC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
901 AM EDT SUN SEP 20 2009
GAC311-201645-
/O.CON.KFFC.FF.W.0029.000000T0000Z-090920T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WHITE GA-
901 AM EDT SUN SEP 20 2009
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 PM EDT FOR
WHITE COUNTY...
AT 857 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE SHOWERS PRODUCING HEAVY RAIN OVER THE WARNED AREA. FLOODING
IS OCCURRING OR IS IMMINENT. WHILE MOST OF THE HEAVIEST RAIN HAS
MOVED OUT OF THE AREA...RUNOFF WILL CONTINUE...AND ADDITIONAL STORMS
ARE EXPECTED THROUGH THE DAY.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO UNICOI STATE
PARK AND HELEN
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.
IN HILLY TERRAIN THERE ARE LOW WATER CROSSINGS WHICH ARE POTENTIALLY
DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED
ROADS...FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF SWIFTLY
FLOWING WATER TO CARRY VEHICLES AWAY.
IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.
&&
LAT...LON 3476 8362 3471 8362 3464 8366 3454 8362
3451 8367 3450 8384 3453 8383 3455 8386
3462 8388 3471 8385 3474 8382 3476 8383
3479 8379 3479 8367
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 5:37 AM EDT | Flash Flood Warning | FFC | Lumpkin | 6 hr |
| Sep 20, 6:34 AM EDT | Flash Flood Warning | FFC | Union | 6 hr |
| Sep 20, 7:40 AM EDT | Flash Flood Warning | FFC | Towns | 6 hr |
| Sep 20, 11:23 AM EDT | Areal Flood Warning | FFC | Lumpkin | 112 min |
| Sep 20, 11:59 AM EDT | River Flood Warning | FFC | Clarke, Greene, Oconee | 5 days |
| Sep 20, 12:23 PM EDT | Areal Flood Warning | FFC | Union, White | 52 min |
| Sep 20, 1:17 PM EDT | Areal Flood Warning | FFC | Lumpkin, Towns, Union, White | 6 hr |
| Sep 20, 1:51 PM EDT | Areal Flood Warning | FFC | Cobb | 6 hr |
| Sep 20, 2:45 PM EDT | Flash Flood Warning | FFC | Cherokee | 6 hr |
| Sep 20, 5:35 PM EDT | River Flood Warning | FFC | Dawson, Forsyth | 38 hr |
| Sep 20, 6:32 PM EDT | Flash Flood Warning | FFC | Catoosa, Walker | 6 hr |
| Sep 20, 6:56 PM EDT | Flash Flood Warning | FFC | Paulding | 4 hr |
| Sep 20, 7:14 PM EDT | Flash Flood Warning | FFC | Cobb | 4 hr |
Nearby
Flash Flood Warnings in Georgia, 2009Every flash flood warning in 2009
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.