Alert archive / Georgia / Flash Flood Warnings in 2010
Flash Flood Warning 22, NWS Atlanta, GA
NWS Atlanta, GA issued this flash flood warning at Sep 27, 2010, 8:57 PM EDT for Gwinnett County, Georgia. It was in force for 65 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
- Sep 27, 2010, 8:57 PM EDT (00:57 UTC)
- Expired
- Sep 27, 2010, 10:02 PM EDT
- In force
- 65 min
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Flood severity
- None
County Gwinnett County, GA
The radar
The Atlanta radar (KFFC), 93 km from the middle of the area, began a volume at 00:58 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, 1.0 hours before the alert went out and 90 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
- 200 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 1287 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
010
WGUS52 KFFC 280057
FFWFFC
GAC135-280645-
/O.NEW.KFFC.FF.W.0022.100928T0057Z-100928T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
857 PM EDT MON SEP 27 2010
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTH CENTRAL GWINNETT COUNTY IN NORTH CENTRAL GEORGIA
* UNTIL 245 AM EDT
* AT 848 PM EDT...THE WATER LEVEL ON LEVEL CREEK THREE MILES NNW OF
SUWANEE WAS AT 8.7 FEET...AND RISING. FLOOD STAGE IS 9.0 FEET.
* WHILE RAIN HAS ENDED IN THIS AREA...THUNDERSTORMS WHICH MOVED
THROUGH
THE AREA EARLIER TODAY DUMPED AN ADDITIONAL 1 TO 1.25 INCHES OF
RAIN
IN THE LEVEL CREEK BASIN. THIS RAINFALL WAS IN ADDITION TO THE 2
TO 3
INCHES OF RAIN THAT FELL ACROSS THIS AREA SUNDAY THROUGH EARLY
MONDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THE STAGE ON LEVEL CREEK NEAR SUWANEE IS EXPECTED TO RISE TO 9.0 FEET
WITHIN THE NEXT HOUR. DO NOT ATTEMPT TO CROSS WATER COVERED
BRIDGES...DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A
FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER
MOVE UP TO HIGHER GROUND.
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 3410 8411 3411 8408 3411 8404 3410 8402
3409 8405 3408 8407 3407 8411
$$1 follow-up statement
353
WGUS72 KFFC 280202
FFSFFC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1002 PM EDT MON SEP 27 2010
GAC135-280208-
/O.CAN.KFFC.FF.W.0022.000000T0000Z-100928T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GWINNETT GA-
1002 PM EDT MON SEP 27 2010
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTH CENTRAL
GWINNETT COUNTY...
LEVEL CREEK THREE NORTH-NORTHWEST OF SUWANEE REACHED 8.9 FEET AND
HAS NOW FALLEN TO 8.7 FEET AND CONTINUES TO FALL. THE CREEK IS
EXPECTED TO REMAIN BELOW FLOOD STAGE...THUS FLASH FLOODING IS NO
LONGER EXPECTED AT THIS TIME.
IF YOU SAW SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.
LAT...LON 3410 8411 3411 8408 3411 8404 3410 8402
3409 8405 3408 8407 3407 8411
$$
19Nearby
Flash Flood Warnings in Georgia, 2010Every flash flood warning in 2010
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.