Alert archive / Georgia / Flash Flood Warnings in 2008

Flash Flood Warning 13, NWS Atlanta, GA

August 26, 2008Towns County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 26, 2008, 1:39 PM EDT for Towns County, Georgia. It was in force for 6 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 26, 2008, 1:39 PM EDT (17:39 UTC)
Expired
Aug 26, 2008, 7:30 PM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

County Towns County, GA

The radar

The Greer radar (KGSP), 132 km from the middle of the area, began a volume at 17:41 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.

What was reported inside it

TimeReportWhereRemark
Aug 26, 2:15 PM EDTFLASH FLOOD5 Sse Hiawassee, GATHE HIWASSEE RIVER REACHED FLOOD STAGE OF 10 FEET. MINOR FLOODING OF THE ENCHANTED VALLEY RESORT AREA AROUND 1 MILE DOWNSTREAM FROM THE STREAM GAGE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 5.7 hours before the alert went out and 184 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.

Skew-T log-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2008-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 825 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2008-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 348 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
825 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
459 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
348 m²/s²
0-3 km storm-relative helicity
373 m²/s²
Significant tornado parameter
1.3
Supercell composite
13.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS52 KFFC 261739
FFWFFC
GAC281-262330-
/O.NEW.KFFC.FF.W.0013.080826T1739Z-080826T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
139 PM EDT TUE AUG 26 2008

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL TOWNS COUNTY IN NORTHEAST GEORGIA

* UNTIL 730 PM EDT

* AT 131 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  2 TO 3 INCHES OF RAIN HAS FALLEN OVER TOWNS COUNTY 730 AM EDT. 
  THE SOILS HAVE BECOME COMPLETELY SATURATED WITH EXCESSIVE RUNOFF.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HIAWASSEE  
  AND MACEDONIA.

ADDITIONAL RAINFALL AMOUNTS AROUND ONE HALF INCH ARE POSSIBLE IN THE 
WARNED AREA WITHIN THE NEXT HOUR.

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. 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 3494 8362 3488 8363 3488 8364 3487 8365
      3483 8366 3483 8365 3480 8366 3480 8375
      3494 8383

$$

16
3 follow-up statements
000 
WGUS72 KFFC 261844
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
244 PM EDT TUE AUG 26 2008

GAC281-262330-
/O.CON.KFFC.FF.W.0013.000000T0000Z-080826T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TOWNS GA-
244 PM EDT TUE AUG 26 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR
CENTRAL TOWNS COUNTY...

AT 229 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
HEAVY RAIN BETWEEN CUMMING AND LAWRENCEVILLE MOVING TO THE NORTHEAST 
AT 30 MPH. THIS HEAVY RAIN IS EXPECTED TO MOVE INTO THE WARNED AREA 
AROUND 400 PM EDT. ADDITIONAL RAINFALL AMOUNTS AROUND ONE HALF TO
ONE INCH IS POSSIBLE.

THE STAGE HEIGHT ON THE HIWASSEE RIVER AT RIVERSIDE DRIVE JUST
UPSTREAM FROM THE ENCHANTED VALLEY RESORT HAS RISEN RAPIDLY TO 10
FEET AT 215 PM EDT. FLOOD STAGE IS 10 FEET. THE RIVER MAY RISE TO 12 
FEET BEFORE CRESTING LATER THIS AFTERNOON. RESIDENTS ALONG THE 
HIWASSEE RIVER SHOULD MONITOR CLOSELY FOR POSSIBLE EVACUATION.

FLASH FLOODING OF SMALL STREAMS AND CREEKS ARE IMMINENT. MOST FLOOD 
RELATED DEATHS OCCUR IN AUTOMOBILES. 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 3494 8362 3488 8363 3488 8364 3487 8365
      3483 8366 3483 8365 3480 8366 3480 8375
      3494 8383

$$

16
000 
WGUS72 KFFC 262048
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
448 PM EDT TUE AUG 26 2008

GAC281-262330-
/O.CON.KFFC.FF.W.0013.000000T0000Z-080826T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TOWNS GA-
448 PM EDT TUE AUG 26 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR
CENTRAL TOWNS COUNTY...

AT 432 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
HEAVY RAIN LOCATED ALONG A LINE FROM MARION TO ALPHARETTA MOVING TO 
THE NORTHEAST AT 30 MPH. THIS HEAVY RAIN MAY MOVE INTO THE WARNED 
AREA AROUND 630 PM EDT. ADDITIONAL RAINFALL AMOUNTS OF ONE HALF 
TO ONE INCH IS POSSIBLE.

THE STAGE HEIGHT ON THE HIWASSEE RIVER AT RIVERSIDE DRIVE JUST
UPSTREAM FROM THE ENCHANTED VALLEY RESORT APPEARS TO HAVE CRESTED AT 
10.4 FEET AROUND 3 PM THIS AFTERNOON. FLOOD STAGE IS 10 FEET. THE 
CURRENT RIVER STAGE IS 10.3 FEET AND IS EXPECTED TO REMAIN STEADY OR 
SLOWLY FALL THROUGH THIS EVENING. RESIDENTS ALONG THE HIWASSEE RIVER 
SHOULD MONITOR CLOSELY FOR POSSIBLE EVACUATION.

FLASH FLOODING OF SMALL STREAMS AND CREEKS ARE IMMINENT. MOST FLOOD 
RELATED DEATHS OCCUR IN AUTOMOBILES. 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 3494 8362 3488 8363 3488 8364 3487 8365
      3483 8366 3483 8365 3480 8366 3480 8375
      3494 8383

$$
000 
WGUS72 KFFC 262327
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
727 PM EDT TUE AUG 26 2008

GAC281-262334-
/O.EXP.KFFC.FF.W.0013.000000T0000Z-080826T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TOWNS GA-
727 PM EDT TUE AUG 26 2008

...THE FLASH FLOOD WARNING WILL EXPIRE AT 730 PM EDT FOR CENTRAL
TOWNS COUNTY...

THE THREAT OF FLASH FLOODING HAS DIMINISHED ACROSS THE WARNED AREA.  
SHOWERS ARE EXPECTED TO CONTINUE MOVING ACROSS THE AREA THROUGH THIS 
EVENING...WITH ADDITIONAL RAINFALL AMOUNTS OF LESS THAN ONE-QUARTER 
INCH.

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 3494 8362 3488 8363 3488 8364 3487 8365
      3483 8366 3483 8365 3480 8366 3480 8375
      3494 8383

$$

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 25, 10:45 PM EDTTornado WarningFFCOglethorpe, Wilkes30 min
Aug 25, 11:08 PM EDTTornado WarningFFCWilkes52 min
Aug 25, 11:56 PM EDTTornado WarningFFCBibb, Houston, Twiggs49 min
Aug 26, 12:01 AM EDTTornado WarningFFCBarrow, Gwinnett, Oconee, Walton44 min
Aug 26, 8:09 AM EDTTornado WarningFFCCobb, DeKalb, Fulton36 min
Aug 26, 9:21 AM EDTFlash Flood WarningFFCCobb4 hr
Aug 26, 9:31 AM EDTTornado WarningFFCTalbot, Taylor, Upson44 min
Aug 26, 9:59 AM EDTTornado WarningFFCLamar22 min
Aug 26, 11:34 AM EDTTornado WarningFFCCrawford, Monroe41 min
Aug 26, 12:04 PM EDTTornado WarningFFCJasper, Jones41 min
Aug 26, 12:28 PM EDTTornado WarningFFCCrisp47 min
Aug 26, 12:40 PM EDTFlash Flood WarningFFCLumpkin, White6 hr
Aug 26, 12:40 PM EDTTornado WarningFFCJasper, Morgan, Putnam50 min
Aug 26, 1:16 PM EDTTornado WarningFFCOconee, Walton29 min
Aug 26, 1:30 PM EDTSevere Thunderstorm WarningFFCClarke, Jackson, Madison30 min
Aug 26, 2:01 PM EDTTornado WarningFFCClarke, Oconee, Oglethorpe29 min
Aug 26, 2:07 PM EDTFlash Flood WarningFFCBanks, Jackson6 hr
Aug 26, 3:16 PM EDTFlash Flood WarningFFCNewton, Rockdale6 hr
Aug 26, 3:28 PM EDTRiver Flood WarningFFCForsyth, Fulton6 hr
Aug 26, 3:49 PM EDTTornado WarningFFCHall, White41 min
Aug 26, 4:08 PM EDTTornado WarningFFCBarrow, Jackson37 min
Aug 26, 4:10 PM EDTTornado WarningFFCDooly, Houston, Macon, Peach50 min
Aug 26, 4:36 PM EDTTornado WarningFFCBanks, Jackson24 min
Aug 26, 4:55 PM EDTTornado WarningFFCGreene, Oglethorpe50 min
Aug 26, 6:02 PM EDTTornado WarningFFCGreene, Oglethorpe, Taliaferro, Wilkes58 min
Aug 26, 6:08 PM EDTTornado WarningFFCBanks, Hall37 min
Aug 26, 6:24 PM EDTTornado WarningFFCBaldwin, Jones38 min
Aug 26, 6:41 PM EDTFlash Flood WarningFFCLumpkin, White6 hr
Aug 26, 7:00 PM EDTTornado WarningFFCWilkes15 min
Aug 26, 7:15 PM EDTAreal Flood WarningFFCHall6 hr
Aug 26, 7:31 PM EDTTornado WarningFFCHancock, Taliaferro, Warren44 min

Nearby

Flash Flood Warnings in Georgia, 2008Every flash flood warning in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.