Flash Flood Watch 2, NWS Atlanta, GA

Banks County, GA, Barrow County, GA, Bartow County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Gwinnett County, GA, Hall County, GA, Haralson County, GA, Heard County, GA, Jackson County, GA, Lumpkin County, GA, Murray County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA

000
WGUS62 KFFC 101549
FFAFFC

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1049 AM EST WED DEC 10 2008

GAZ001>009-011>016-019>025-030>035-041>045-052>055-110000-
/O.CAN.KFFC.FF.A.0002.000000T0000Z-081210T2100Z/
/O.NEW.KFFC.FA.A.0002.081210T1549Z-081211T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DADE-WALKER-CATOOSA-WHITFIELD-MURRAY-FANNIN-GILMER-UNION-TOWNS-
CHATTOOGA-GORDON-PICKENS-DAWSON-LUMPKIN-WHITE-FLOYD-BARTOW-
CHEROKEE-FORSYTH-HALL-BANKS-JACKSON-POLK-PAULDING-COBB-
NORTH FULTON-GWINNETT-BARROW-HARALSON-CARROLL-DOUGLAS-
SOUTH FULTON-DEKALB-HEARD-COWETA-FAYETTE-CLAYTON-
INCLUDING THE CITIES OF...CALHOUN...DAHLONEGA...CLEVELAND...
ROME...CARTERSVILLE...GAINESVILLE...MARIETTA...ATLANTA...
LAWRENCEVILLE...CARROLLTON...DOUGLASVILLE...EAST POINT...
DECATUR...NEWNAN...PEACHTREE CITY
1049 AM EST WED DEC 10 2008

...FLOOD WATCH IN EFFECT THROUGH THURSDAY MORNING...
...FLASH FLOOD WATCH IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

FLOOD WATCH FOR PORTIONS OF NORTH CENTRAL GEORGIA...NORTHEAST
GEORGIA...NORTHWEST GEORGIA AND WEST CENTRAL GEORGIA THROUGH
THURSDAY MORNING.

AN AREA OF SHOWERS AND THUNDERSTORMS ASSOCIATED WITH A STRONG
COLD FRONT HAS MOVED ACROSS NORTH GEORGIA THIS MORNING. WIDESPREAD
RAINFALL AMOUNTS OF 2 TO 4 INCHES HAVE BEEN REPORTED...MAINLY OVER
NORTHWEST GEORGIA. RIVERS AND STREAMS ACROSS THE AREA ARE ON THE
RISE...AND WITH MORE RAINFALL EXPECTED THIS AFTERNOON AND TONIGHT...
THE POTENTIAL FOR FLOODING WILL EXIST THROUGH THURSDAY MORNING.

A FLOOD WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR FLOODING
ESPECIALLY ALONG LARGER STREAMS AND RIVERS. IF YOU ARE IN THE
WATCH AREA...CHECK YOUR PREPAREDNESS REQUIREMENTS...ESPECIALLY IF
YOU HAVE INTERESTS ALONG AREA RIVERS. KEEP INFORMED...AND BE READY
FOR ACTION IF FLOODING IS OBSERVED OR IF A FLOOD WARNING IS
ISSUED.

THE FLASH FLOOD WATCH FOR PORTIONS OF NORTH CENTRAL GEORGIA...
NORTHEAST GEORGIA...NORTHWEST GEORGIA AND WEST CENTRAL GEORGIA
HAS BEEN CANCELED. ALTHOUGH THE THREAT FOR WIDESPREAD FLASH
FLOODING HAS ENDED...LOCALIZED FLASH FLOODING IS STILL POSSIBLE IN
THE MOUNTAINOUS TERRAIN OF NORTHEAST GEORGIA AS WELL AS URBANIZED 
AREAS.

$$

GAZ027-036>039-046>051-057-110000-
/O.NEW.KFFC.FA.A.0002.081210T1549Z-081211T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MADISON-CLARKE-OCONEE-OGLETHORPE-WILKES-ROCKDALE-WALTON-NEWTON-
MORGAN-GREENE-TALIAFERRO-HENRY-
INCLUDING THE CITIES OF...ATHENS...CONYERS...COVINGTON
1049 AM EST WED DEC 10 2008

...FLOOD WATCH IN EFFECT THROUGH THURSDAY MORNING...

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

FLOOD WATCH FOR PORTIONS OF EAST CENTRAL GEORGIA...NORTH CENTRAL
GEORGIA AND NORTHEAST GEORGIA.

THROUGH THURSDAY MORNING

A POWERFUL STORM SYSTEM AND ASSOCIATED COLD FRONT WILL BRIEF
SEVERAL PERIODS OF POSSIBLY HEAVY RAIN ACROSS THE AREA TODAY AND
TOMORROW. RAINFALL AMOUNTS OF ONE TO THREE INCHES CAN BE
EXPECTED...AND THIS RAINFALL HAS THE POTENTIAL TO SEND LARGE
STREAMS AND RIVERS OUT OF THEIR BANKS THROUGH THURSDAY MORNING. IN
ADDITION...THE THREAT FOR FLOODING OVER URBANIZED AREAS WILL
CONTINUE THROUGH THE PERIOD.

A FLOOD WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR FLOODING
ESPECIALLY ALONG LARGER STREAMS AND RIVERS. IF YOU ARE IN THE
WATCH AREA...CHECK YOUR PREPAREDNESS REQUIREMENTS...ESPECIALLY IF
YOU HAVE INTERESTS ALONG AREA RIVERS. KEEP INFORMED...AND BE
READY FOR ACTION IF FLOODING IS OBSERVED OR IF A FLOOD WARNING IS
ISSUED.

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
407 AM EST WED DEC 10 2008

.SHORT TERM /TODAY THROUGH FRIDAY/...

SHORT TERM IS AWFULLY BUSY. SOUTHERLY FLOW IN FULL FORCE WITH
FRONT APPROACHING. MODELS COMING INTO AGREEMENT WITH THE UPPER LOW
THAT WILL CUT OFF OVER THE SOUTHEAST. ECMWF WAS MOVING THIS SYSTEM
OUT A LITTLE FASTER BUT THE NEW 00Z RUN HAS SLOWED IT DOWN. STILL
NOT AS COLD AS THE GFS BUT WITH IT COMING MORE INTO LINE WITH THE
OTHER SHORT-TERM MODELS...CONFIDENCE IS HIGHER ON EVOLUTION OF THE
SYSTEM. MORE ON THAT BELOW. TEMPS TODAY WILL BE TRICKY (YESTERDAY
DIDNT TURN OUT TOO WELL)...MANY AREAS WILL SEE A 12Z HIGH. HAVE
GONE GENERALLY WITH MAV TEMPS WITH ADJUSTMENTS FOR THE DIURNAL
CURVE...AND HOPE THAT ITLL WORK OUT BETTER THAN YESTERDAY.

STRONG LLJ ASSOCIATED WITH THE FRONT IS MOVING THROUGH NORTH
GEORGIA NOW. MOMENTUM CAN EASILY BE TRANSFERRED DOWN TO THE
SURFACE UNTIL THE STRONGEST OF THESE WINDS MOVE THROUGH...SO HAVE
EXTENDED THE WIND ADVISORY IN THE MOUNTAINS THROUGH 18Z. IN
ADDITION WITH THE RAINFALL CONCERNS HAVE ISSUED FLASH FLOOD WATCH
FOR TODAY...MORE ON THAT IN THE HYDRO SECTION.

INSTABILITY NOT ALL THAT IMPRESSIVE BUT SBCAPES RANGE FROM NEAR
500 IN CENTRAL GEORGIA TO AROUND 100 (OR JUST UNDER) IN NORTH
GEORGIA...DEPENDING ON WHICH MODEL YOU CHOOSE. THIS COMBINED WITH
THE INCREDIBLE SHEAR...400-600 M2/S2...AND SPC MESOANALYSES
INDICATE POTENTIALLY HIGHER SHEAR VALUES...IT WONT TAKE MUCH CAPE
TO GET THINGS GOING. HAVE INCLUDED THUNDER EVERYWHERE TODAY...
ADJUSTING IT FURTHER SOUTH AND EAST THROUGH THURSDAY. SWODY2 PUTS
US IN A SLIGHT RISK IN EASTERN ZONES...THIS WOULD BE EARLY IN THE
PERIOD IN THE VICINITY OF THE SURFACE LOW WITH STRONG SOUTHEAST
INFLOW AND THE APPROACHING UPPER LOW TO SHARPLY INCREASE LAPSE
RATES WITH DECREASING TEMPS ALOFT. AM NOT INCLUDING SEVERE WORDING
IN THE GRIDS JUST YET FOR THURSDAY BUT WILL HAVE TO BE MONITORED.

OTHER ASPECT WITH APPROACHING UPPER LOW IS LATE THURSDAY INTO
EARLY FRIDAY...TEMPS ALOFT DECREASE RAPIDLY AND WITH THE STRENGTH
OF THE SURFACE LOW WRAPPING MOISTURE AROUND IT...IT DOES LOOK LIKE
PORTIONS OF THE SOUTHEAST MAY ACTUALLY GET SNOW. GROUND TEMPS ARE
KIND OF WARM THOUGH SO NOT SURE HOW ALL THIS WILL PLAY OUT.
LOCATION OF THE UPPER LOW PUTS BEST CHANCES OVER MS/AL...BUT AS
THE LOW LIFTS OUT IT DOES GIVE PORTIONS OF NORTH GEORGIA A QUICK
SHOT LATE THURSDAY INTO EARLY FRIDAY. BECAUSE WERE IN SUCH WARM
FLOW DUE TO LOCATION OF SURFACE LOW FOR SO LONG ON THURSDAY...
SURFACE TEMPS WONT QUITE HAVE A CHANCE TO COOL THAT MUCH.
HOWEVER...HAVE INCLUDED A RAIN/SNOW MIX AND IT IS POSSIBLE THAT
THE HIGHER ELEVATIONS OF THE MOUNTAINS MAY GET SOME LIGHT
ACCUMULATIONS...WILL WAIT FOR LATER FORECASTS TO NARROW THIS DOWN
AS THESE MODELS HAVE BEEN ALL OVER THE PLACE THE LAST FEW DAYS.
FOR NOW...NOT ALL THAT EXCITED ABOUT IT BUT FELT IT PRUDENT TO
INCLUDE THE MIX IN THE GRIDS ESPECIALLY GIVEN CONCERNS IN MS/AL.

COOLER ON FRIDAY AS HIGH PRESSURE BUILDS IN AND NORTHERLY FLOW AT
THE SURFACE WITH LARGE UPPER TROUGH ALOFT.

.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...

FLOW RETURNS TO NEAR ZONAL FOR THE BEGINNING OF THE EXTENDED AS
HIGH PRESSURE ZIPS THROUGH AND MOVES OFFSHORE. THE HIGH HAS A HARD
TIME TOTALLY ERODING AND WEDGES AGAINST THE APPALACHIANS...KEEPING
A SLIGHTLY COOLER EASTERLY FETCH OVER PORTIONS OF THE AREA. HOWEVER
WITH RIDGING ALOFT WE DO EVENTUALLY RETURN TO A WARMER PATTERN.
SOME DISAGREEMENT STILL ON A WEAK FRONT THAT MAY AFFECT THE AREA
LATE IN THE EXTENDED...STILL HAVE NOT INCLUDED ANY POPS WITH IT AT
THIS TIME.

&&

.HYDROLOGY...

COMBINATION OF ISENTROPIC UPGLIDE...WEAK UPSLOPE FLOW...AND STRONG
MOISTURE TRANSPORT VECTORS STRAIGHT OUT OF THE WIDE OPEN GULF HAVE
LED TO WIDESPREAD AMOUNTS OF 3-4 ACROSS PORTIONS OF NORTHERN
ALABAMA. AS THIS MOVES EAST IT LOSES SOME OF THE MOISTURE SURGE
BUT UPSLOPE FLOW INCREASES AS THE SYSTEM APPROACHES THE
APPALACHIANS. FFG VALUES RANGE FROM 2-3 DEPENDING ON LOCATION
(LOWER FOR THE METRO AREA) AND WITH FLOODING REPORTS OUT OF
ALABAMA...FELT IT PRUDENT TO ISSUE FLASH FLOOD WATCH FOR PORTIONS
OF NORTH GEORGIA TODAY. NOT SURE IF METRO ATLANTA WILL SEE THESE
HIGH AMOUNTS...BUT BEST TO GO AHEAD AND INCLUDE IT FACTORING IN
THE URBAN SETTING. WILL HAVE IT RUN THROUGH THIS AFTERNOON AS THE
STRONGEST UPSLOPE WINDS MOVE THROUGH...BUT THERE MAY BE ANOTHER
CONCERN FOR THURSDAY. BY THEN...SOILS WILL BE SATURATED AND
SOUTHEAST FLOW AHEAD OF THE SURFACE (AND UPPER) LOW WILL ADD TO
CONCERN FOR THE MOUNTAINS. THIS WILL HAVE TO BE REEVALUATED.

TDP

&&

.PRELIMINARY POINT TEMPS/POPS...
ATHENS          63  53  58  37  55 / 100 100 100  40   5
ATLANTA         63  52  55  33  53 / 100 100 100  30   5
BLAIRSVILLE     60  50  55  31  46 / 100 100 100  50   5
CARTERSVILLE    61  49  53  32  50 / 100 100 100  40   5
COLUMBUS        69  56  58  36  56 / 100 100  90  30   5
GAINESVILLE     59  51  55  36  51 / 100 100 100  40   5
MACON           71  57  60  36  59 / 100 100  90  30   5
ROME            60  50  51  34  50 / 100  90 100  40   5
PEACHTREE CITY  65  52  56  33  54 / 100 100  90  30   5
VIDALIA         75  57  64  42  59 /  60  80  80  30   5

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH FROM 7 AM EST THIS MORNING THROUGH THIS
AFTERNOON FOR THE FOLLOWING ZONES: BANKS...BARROW...BARTOW...
CARROLL...CATOOSA...CHATTOOGA...CHEROKEE...CLAYTON...COBB...
COWETA...DADE...DAWSON...DEKALB...DOUGLAS...FANNIN...FAYETTE...
FLOYD...FORSYTH...GILMER...GORDON...GWINNETT...HALL...HARALSON...
HEARD...JACKSON...LUMPKIN...MURRAY...NORTH FULTON...PAULDING...
PICKENS...POLK...SOUTH FULTON...TOWNS...UNION...WALKER...WHITE...
WHITFIELD.

TORNADO WATCH UNTIL 9 AM EST THIS MORNING FOR THE FOLLOWING
ZONES: BARTOW...CARROLL...CHATTOOGA...FLOYD...GORDON...
HARALSON...HEARD...PAULDING...POLK.

WIND ADVISORY UNTIL 1 PM EST THIS AFTERNOON FOR THE FOLLOWING
ZONES: BANKS...BARTOW...CATOOSA...CHATTOOGA...CHEROKEE...DADE...
DAWSON...FANNIN...FLOYD...FORSYTH...GILMER...GORDON...HALL...
LUMPKIN...MURRAY...PICKENS...TOWNS...UNION...WALKER...WHITE...
WHITFIELD.

&&

TDP

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
104 AM EST WED DEC 10 2008

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-110615-
BALDWIN-BANKS-BARROW-BARTOW-BIBB-BLECKLEY-BUTTS-CARROLL-CATOOSA-
CHATTAHOOCHEE-CHATTOOGA-CHEROKEE-CLARKE-CLAYTON-COBB-COWETA-
CRAWFORD-CRISP-DADE-DAWSON-DEKALB-DODGE-DOOLY-DOUGLAS-EMANUEL-
FANNIN-FAYETTE-FLOYD-FORSYTH-GILMER-GLASCOCK-GORDON-GREENE-
GWINNETT-HALL-HANCOCK-HARALSON-HARRIS-HEARD-HENRY-HOUSTON-JACKSON-
JASPER-JEFFERSON-JOHNSON-JONES-LAMAR-LAURENS-LUMPKIN-MACON-
MADISON-MARION-MERIWETHER-MONROE-MONTGOMERY-MORGAN-MURRAY-
MUSCOGEE-NEWTON-NORTH FULTON-OCONEE-OGLETHORPE-PAULDING-PEACH-
PICKENS-PIKE-POLK-PULASKI-PUTNAM-ROCKDALE-SCHLEY-SOUTH FULTON-
SPALDING-STEWART-SUMTER-TALBOT-TALIAFERRO-TAYLOR-TELFAIR-TOOMBS-
TOWNS-TREUTLEN-TROUP-TWIGGS-UNION-UPSON-WALKER-WALTON-WARREN-
WASHINGTON-WEBSTER-WHEELER-WHITE-WHITFIELD-WILCOX-WILKES-
WILKINSON-
104 AM EST WED DEC 10 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH AND CENTRAL GEORGIA.

.DAY ONE...OVERNIGHT
ISOLATED THUNDERSTORMS POSSIBLE AND STRONG GUSTY WINDS EXPECTED
ACROSS PORTIONS OF NORTH GEORGIA REST OF TONIGHT.

.SYNOPSIS...
A WARM FRONT STRETCHING ACROSS NORTH CENTRAL GEORGIA WILL CONTINUE
TO DRIFT NORTHWARD AS A COLD FRONT MOVES EAST FROM THE TENNESSEE
AND LOWER MISSISSIPPI RIVER VALLEY REGION.

.PRIMARY HAZARDS...
THE PRIMARY HAZARD WILL BE OCCASIONAL LIGHTNING AND WIND GUSTS
OF 30 TO 40 MPH.

.DISCUSSION...
WINDS WILL CONTINUE TO BE GUSTY ACROSS PORTIONS OF NORTH GEORGIA
OVERNIGHT...ESPECIALLY IN THE HIGHER ELEVATIONS OF THE NORTHEAST
GEORGIA MOUNTAINS. ISOLATED THUNDERSTORMS WILL BE POSSIBLE ACROSS
PORTIONS OF NORTH GEORGIA A COLD FRONT MOVES EAST FROM THE LOWER
MISSISSIPPI VALLEY. WITH CAPES LESS THAN 500 AND LIFTED INDICIES
FROM ZERO TO MINUS 1...THUNDERSTORMS ARE EXPECTED TO STAY BELOW
SEVERE LIMITS AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
THERE IS A CHANCE FOR THUNDERSTORMS ACROSS MUCH OF NORTH AND
CENTRAL GEORGIA WEDNESDAY AND WEDNESDAY NIGHT...AND ACROSS CENTRAL
GEORGIA THURSDAY. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED
DURING THE REST OF THE PERIOD AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED FOR THE REST OF TONIGHT.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
240 AM EST WED DEC 10 2008

GAZ001>003-100815-
240 AM EST WED DEC 10 2008

...SIGNIFICANT WEATHER ALERT FOR 45 MPH WINDS AND HEAVY RAIN IN
DADE...WALKER AND CATOOSA COUNTIES UNTIL 315 AM EST...

AT 238 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER RISING FAWN...MOVING EAST AT 35 MPH.

WIND GUSTS OF 45 MPH AND HEAVY RAIN ARE LIKELY AS THIS STORM MOVES
ACROSS DADE...WALKER AND CATOOSA COUNTIES. SOME LOCATIONS IN THE
PATH OF THE STORM INCLUDE WILDWOOD...RISING FAWN...NEW ENGLAND
...CLOUDLAND STATE PARK...TRENTON...HINKLES...DAVIS CROSSROADS
...ROSSVILLE...LOOKOUT MOUNTAIN ...LINWOOD...LA FAYETTE AND
CHICKAMAUGA.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
312 AM EST WED DEC 10 2008

GAZ002>004-100900-
312 AM EST WED DEC 10 2008

...SIGNIFICANT WEATHER ALERT FOR 50 MPH WINDS AND HEAVY RAIN IN
WALKER...WHITFIELD AND CATOOSA COUNTIES UNTIL 400 AM EST...

AT 309 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS FROM GRAYSVILLE TO 12 MILES SOUTHWEST OF CEDAR
GROVE...MOVING EAST AT 30 MPH.

THESE WIND GUSTS MAY PRODUCE MINOR DAMAGE TO TREE LIMBS AND BLOW
...UNSECURED OBJECTS AROUND.