Alert archive / Georgia / Flash Flood Warnings in 2011
Flash Flood Warning 14, NWS Atlanta, GA
NWS Atlanta, GA issued this flash flood warning at Dec 23, 2011, 12:18 AM EST for DeKalb County, Georgia. It was in force for 10 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Dec 23, 2011, 12:18 AM EST (05:18 UTC)
- Expired
- Dec 23, 2011, 12:28 AM EST
- In force
- 10 min
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Flood severity
- None
County DeKalb County, GA
The radar
The Atlanta radar (KFFC), 43 km from the middle of the area, began a volume at 05:18 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
Birmingham, AL (KBMX), launched 00:00Z, 5.3 hours before the alert went out and 237 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1047 m above ground
- 0-6 km bulk shear
- 75 kt
- 0-1 km storm-relative helicity
- -188 m²/s²
- 0-3 km storm-relative helicity
- -284 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
210
WGUS52 KFFC 230518
FFWFFC
GAC089-231115-
/O.NEW.KFFC.FF.W.0014.111223T0518Z-111223T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1218 AM EST FRI DEC 23 2011
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHWESTERN DEKALB COUNTY IN NORTH CENTRAL GEORGIA
* UNTIL 615 AM EST
* AT 1211 AM EST...THE RIVER STAGE ON BIG CREEK AT CUMMING HAD
REACHED 5.96 FEET. FLOOD STAGE IS 6.0 FEET. THE RIVER IS EXPECTED
TO CREST JUST ABOVE 6.0 FEET WITHIN THE NEXT HOUR...THEN FALL BELOW
FLOOD STAGE LATER TONIGHT.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
PANTHERSVILLE.
HEAVY RAIN FELL ACROSS THIS AREA DURING THE PAST TWO DAYS...WITH
RAINFALL AMOUNTS NEAR 2.0 INCHES SINCE WEDNESDAY. THIS HAS CAUSED
BIG CREEK TO SWELL TO FLOOD STAGE...IN LESS THAN SIX HOURS. THUS...A
FLASH FLOOD WARNING IS BEING ISSUED.
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 3372 8432 3372 8424 3365 8427 3365 8432
3365 8433
$$1 follow-up statement
902
WGUS72 KFFC 230528
FFSFFC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1228 AM EST FRI DEC 23 2011
GAC089-230536-
/O.CAN.KFFC.FF.W.0014.000000T0000Z-111223T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DEKALB GA-
1228 AM EST FRI DEC 23 2011
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHWESTERN DEKALB
COUNTY...
THE FLASH FLOOD WARNING ISSUED FOR SOUTHWEST DEKALB COUNTY WAS
INTENDED FOR BIG CREEK IN SOUTHWEST FORSYTH COUNTY. THERE IS NO
FLASH FLOODING OBSERVED ALONG CREEKS OR STREAMS IN DEKALB COUNTY AT
THIS TIME.
LAT...LON 3372 8432 3372 8424 3365 8427 3365 8432
3365 8433
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 22, 7:02 PM EST | Special Weather Statement | FFC | Dooly, Houston, Macon, Peach, Schley, Taylor | 58 min |
| Dec 22, 7:43 PM EST | River Flood Warning | FFC | Dade | 8 hr |
| Dec 22, 7:54 PM EST | Special Weather Statement | FFC | Bleckley, Houston | 51 min |
| Dec 22, 8:57 PM EST | River Flood Warning | FFC | Murray, Whitfield | 26 hr |
| Dec 22, 9:06 PM EST | River Flood Warning | FFC | Forsyth, Fulton | 10 hr |
| Dec 23, 12:25 AM EST | Flash Flood Warning | FFC | Forsyth | 76 min |
| Dec 23, 2:57 AM EST | River Flood Warning | FFC | Whitfield | 37 hr |
Nearby
Flash Flood Warnings in Georgia, 2011Every flash flood warning in 2011
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.