Alert archive / Georgia / Flash Flood Warnings in 2008

Flash Flood Warning 9, NWS Atlanta, GA

July 26, 2008Lumpkin County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 26, 2008, 5:42 PM EDT for Lumpkin County, Georgia. It was in force for 119 min. 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
Jul 26, 2008, 5:42 PM EDT (21:42 UTC)
Expired
Jul 26, 2008, 7:41 PM EDT
In force
119 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

County Lumpkin County, GA

The radar

The Atlanta radar (KFFC), 139 km from the middle of the area, began a volume at 21:42 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
Jul 26, 6:30 PM EDTHEAVY RAIN 32 S Dahlonega, GA3 INCHES OF RAIN MEASURED JUST SOUTH OF DAHLONEGA.

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, 9.7 hours before the alert went out and 136 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 2008-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1205 joules per kilogram.LCLLFCEL10008507005003002001001 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 2008-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.1939Sfc1 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
1205 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
916 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
28 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KFFC 262144
FFWFFC
GAC187-270345-
/O.NEW.KFFC.FF.W.0009.080726T2142Z-080727T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
542 PM EDT SAT JUL 26 2008

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LUMPKIN COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 1145 PM EDT

* AT 538 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GARLAND AND
  DAHLONEGA.

RAINFALL AMOUNTS OF 2 TO 3 INCHES HAVE ALREADY FALLEN...AND 
ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE IN THE 
WARNED AREA...INCLUDING CROOKED CREEK.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...AS WELL AS HIGHWAYS AND UNDERPASSES.
ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF
CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

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 3460 8406 3453 8387 3442 8397 3449 8413

$$
2 follow-up statements
000 
WGUS72 KFFC 262243
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
638 PM EDT SAT JUL 26 2008

GAC187-270345-
/O.CON.KFFC.FF.W.0009.000000T0000Z-080727T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LUMPKIN GA-
638 PM EDT SAT JUL 26 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT FOR
LUMPKIN COUNTY...

AT 633 PM EDT...THE THUNDERSTORM THAT PRODUCED THE HEAVY RAIN OVER 
LUMPKIN COUNTY HAS MOVED OUT OF THE AREA...BUT THE FLASH FLOOD 
WARNING REMAINS IN EFFECT DUE TO THE ESTIMATED 3 TO 5 INCHES OF RAIN 
THAT FELL OVER PORTIONS OF THE COUNTY BETWEEN 4 AND 6 PM.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GARLAND AND 
DAHLONEGA...ALSO INCLUDING BUT NOT LIMITED TO CROOKED CREEK.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...AS WELL AS HIGHWAYS AND UNDERPASSES.
ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF
CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

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 3460 8406 3453 8387 3442 8397 3449 8413

$$
000 
WGUS72 KFFC 262341
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
735 PM EDT SAT JUL 26 2008

GAC187-262345-
/O.CAN.KFFC.FF.W.0009.000000T0000Z-080727T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LUMPKIN GA-
735 PM EDT SAT JUL 26 2008

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR LUMPKIN COUNTY...

WHILE THE THUNDERSTORM HAS MOVED OUT OF THE COUNTY...RAINFALL 
ESTIMATES OF 3 TO 5 INCHES FELL ACROSS PORTIONS OF LUMPKIN COUNTY 
JUST SOUTHWEST OF DAHLONEGA BETWEEN 4 AND 6 PM. A REPORT OF 3 INCHES 
OF RAIN IN DAHLONEGA WAS RECEIVED FROM THE LUMPKIN COUNTY EMERGENCY 
MANAGER. IT MAY STILL TAKE SOME TIME FOR HIGH WATER TO RECEDE...SO 
CONTINUE TO USE CAUTION IN LOW-LYING AREAS.

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 3460 8406 3453 8387 3442 8397 3449 8413

$$

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.