Alert archive / Georgia / Flash Flood Warnings in 2009
Flash Flood Warning 4, NWS Atlanta, GA
NWS Atlanta, GA issued this flash flood warning at Jun 4, 2009, 11:14 PM EDT for Gwinnett County, Georgia. It was in force for 3 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
- Jun 4, 2009, 11:14 PM EDT (03:14 UTC)
- Expired
- Jun 5, 2009, 1:56 AM EDT
- In force
- 3 hr
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Flood severity
- None
County Gwinnett County, GA
The radar
The Atlanta radar (KFFC), 89 km from the middle of the area, began a volume at 03:18 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
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 3.2 hours before the alert went out and 85 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
- 987 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 490 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 11 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 050314 FFWFFC GAC135-050715- /O.NEW.KFFC.FF.W.0004.090605T0314Z-090605T0715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PEACHTREE CITY GA 1114 PM EDT THU JUN 4 2009 THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL GWINNETT COUNTY IN NORTH CENTRAL GEORGIA * UNTIL 315 AM EDT * AT 1110 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A BAND OF HEAVY RAIN OVER THE WARNED AREA. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LAWRENCEVILLE...SUGAR HILL AND BUFORD. PRECAUTIONARY/PREPAREDNESS ACTIONS... PEW CREEK IS RISING RAPIDLY JUST SOUTHWEST OF LAWRENCEVILLE AND IS EXPECTED TO CREST BETWEEN 11 FEET AND 12 FEET. FLOOD STAGE ON PEW CREEK SOUTHWEST OF LAWRENCEVILLE IS 11 FEET. PEW CREEK SHOULD DROP BELOW FLOOD STAGE BY 3 AM. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. 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 3414 8403 3408 8387 3383 8396 3387 8412 $$
1 follow-up statement
000 WGUS72 KFFC 050556 FFSFFC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE PEACHTREE CITY GA 156 AM EDT FRI JUN 5 2009 GAC135-050630- /O.CAN.KFFC.FF.W.0004.000000T0000Z-090605T0715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ GWINNETT GA- 156 AM EDT FRI JUN 5 2009 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL GWINNETT COUNTY... PEW CREEK JUST SOUTHWEST OF LAWRENCEVILLE CRESTED AT 10.8 FEET AT 1215 AM EDT. FLOOD STAGE IS 11 FEET. THE CREEK HAS STEADILY FALLEN SINCE THEN AND HAS DROPPED TO 7.3 FEET AS OF 145 AM EDT. THE MORE WIDESPREAD HEAVY RAIN SHOWERS HAVE MOVED WELL EAST OF GWINNETT COUNTY AND FURTHER FLOODING IS NOT EXPECTED TONIGHT. IF YOU OBSERVED SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6. LAT...LON 3414 8403 3408 8387 3383 8396 3387 8412 $$
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.