Severe Thunderstorm Warning 278, NWS Tallahassee, FL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
332 PM EDT WED AUG 5 2009

.SHORT TERM (TONIGHT THROUGH FRIDAY NIGHT)...GRADUAL CHANGES IN
THE WEATHER EXPECTED OVER THE NEXT FEW DAYS AS THE UPPER PATTERN
EVOLVES. LINGERING UPPER TROUGH IS FORECAST TO WEAKEN THROUGH THE
END OF THE WEEK WITH UPPER RIDGE BUILDING OVER THE SOUTHEASTERN
STATES. AT THE SURFACE...A WEAK TROUGH...CURRENTLY OVER CENTRAL
GA/AL WILL SAG SOUTH THURSDAY AND FRIDAY WITH A DRIER AIR MASS
FILTERING IN. BEST POPS FOR THURSDAY WILL BE OVER THE SOUTHERN
HALF OF THE CWA SOUTH OF THE SFC BOUNDARY.

BY FRIDAY...WEAK TROUGH WILL KEEP BARELY HANGING ON WHILE LOW
LEVEL SUBTROPICAL RIDGE EASES NORTH AND SETTLES OVER THE CWA. THIS
WILL SWING THE LOW LEVEL FLOW AROUND TO THE EAST OR SOUTHEAST.
BEST POPS FRIDAY WILL ONCE AGAIN BE ACROSS FLORIDA...SOUTH OF THE
BOUNDARY. OVERALL...POPS WILL BE ON GENTLE DECLINE WITH SLIGHTLY
LESS CONVECTIVE SOUTHEAST FLOW. HIGH TEMPS MAY RISE INTO THE
MID/UPPER 90S OVER THE NORTHERN HALF WITH DRIER AIR WORKING IN
ALOFT.

.LONG TERM (FRIDAY NIGHT THROUGH WEDNESDAY)...GUIDANCE CONTS TO
GENERALLY AGREE ON EXTENDED SYNOPTIC PATTERN. THIS IS INITIALLY
HIGHLIGHTED BY A TROUGH OVER WRN CONUS AND A BUILDING RIDGE OVER
ERN 2/3RD OF CONUS. UPPER HIGH IS ANCHORED ACROSS THE DEEP
SOUTH...WITH THE SURFACE RIDGE LIFTING NORTH AND REMAINING ACROSS
THE NORTHERN GULF OF MEXICO.

BY EARLY SAT...THE TROUGH BEGINS TO EJECT NEWD TOWARDS CANADIAN
PRAIRIES IN RESPONSE TO UPPER LOW OVER ALEUTIANS DROPPING SEWD. THIS
WILL LIKELY CAUSE DEEP ERN RIDGE TO MIGRATE WWD WITH AN EQUALLY
STRONG SUBTROPICAL RIDGE BUILDING WESTWARD FROM THE ATLANTIC INTO
THE EASTERN U.S. SEVERAL UPPER HIGHS FORECAST TO INTERFACE ACROSS
TENN VALLEY RESULTING IN GIANT 598 HIGH/UPPER RIDGE CENTERED OVER SE
SAT-MON. STACKED SFC AND UPPER LEVEL RIDGING OVER THE REGION WITH
AMPLE SUBSIDENCE WILL CONTINUE TO GENERATE A VERY HOT AND HUMID
PERIOD BUT WITH A MOIST AND TROPICAL SURFACE AIRMASS TRAPPED UNDER
THE RIDGE. SO UPPER RIDGE WILL NOT BE ABLE TO COMPLETELY SHUT OFF
DIURNAL TSRA ACTIVITY. THEN...MODELS SHOW CANADIAN TROUGH SHIFTING
EWD WHILE ELY WAVES MOVE AROUND SOUTHERN SIDE OF THE RIDGE. THIS
FORCES RIDGE TO COMPRESS AND SHIFT BACK EWD...DECREASING SUBSIDENCE
AND FAVORING INCREASING PRECIPITABLE WATER VALUES WILL RESULT IN
INCREASING RAIN CHANCES SECOND HALF OF EXTENDED.

WILL GO WITH VERY LOW POPS THRU SAT NIGHT..THEN MAINLY AFTN/EVE LOW
SCT POPS REST OF THE PERIOD. WITH A MOIST LOW LEVEL...MINIMUM TEMPS
WILL REMAIN IN THE LOW TO MID 70S...OR ABOVE CLIMO (AROUND 70) THRU
THE PERIOD. MAX TEMPS WILL REMAIN IN THE LOW-MID 90S OR SLIGHTLY
ABOVE CLIMO (AROUND 91) THRU THE PERIOD.

&&

.AVIATION...SCT SHRA AND TSRA WILL BE LIKELY THIS AFTERNOON AT
ALL TAF SITES. VISIBLE SATELLITE SHOWS A WELL DEVELOPED CU FIELD
OVER MUCH OF THE REGION. EXPECT TSRA TO DEVELOP AND BECOME MORE
NUMEROUS INTO THE AFTERNOON AND EVENING HOURS. STRONGER STORMS
WILL BE MORE LIKELY FURTHER NORTH AROUND DHN AND ABY. THESE STORMS
MAY PRODUCE DAMAGING WINDS AND TORRENTIAL RAINFALL. ANY STORM THAT
FORMS MAY BRIEFLY PRODUCE MVFR/IFR CONDITIONS. OTHERWISE, VFR
CONDITIONS ARE ANTICIPATED THROUGH THE LATE EVENING. BY 0800
THURS, FOG DEVELOPMENT MAY RESULT IN MVFR CONDITIONS FOR A FEW
HOURS AT VLD, DHN, AND ABY. FOG SHOULD LIFT AND DIMINISH BY 1400Z,
GIVING WAY TO VFR CONDITIONS AT ALL LOCATIONS OUTSIDE OF SCT TSRA
THAT MAY DEVELOP ONCE AGAIN THURSDAY AFTERNOON.

&&

.MARINE...FLOW WILL GRADUALLY SWING AROUND TO THE SOUTHEAST OVER
THE NEXT FEW DAYS. HOWEVER...GRADIENT WILL REMAIN VERY WEAK WITH
WINDS AND SEAS STAYING MINIMAL.

&&

.FIRE WEATHER...MOIST LOW LEVEL FLOW BETWEEN HIGH PRESSURE TO OUR
SOUTH AND A WEAK FRONT JUST NORTH OF THE REGION WILL PREVENT
CRITICAL FIRE WEATHER CONDITIONS FROM BEING REACHED THROUGH
THURSDAY. STACKED LOW AND UPPER LEVEL HIGH PRESSURE BUILDING OVER
THE REGION FOR THE END OF THE WEEK WILL RESULT IN ABOVE NORMAL
TEMPERATURES AND BELOW NORMAL RAIN CHANCES. HOWEVER... DESPITE THE
HIGHER TEMPERATURES...CRITICAL FIRE WEATHER CONDITIONS ARE NOT
ANTICIPATED DURING THE UPCOMING WEEKEND.

&&

.PRELIMINARY POINT TEMPS/POPS...
TALLAHASSEE   71  93  70  95  73 /  30  40  20  30  20
PANAMA CITY   75  90  76  91  77 /  30  40  20  20  10
DOTHAN        70  94  71  95  73 /  30  20  20  20  20
ALBANY        71  94  70  95  71 /  30  30  20  20  20
VALDOSTA      71  93  70  95  71 /  30  50  20  30  20
CROSS CITY    71  91  71  93  72 /  30  50  20  40  20
APALACHICOLA  76  89  76  90  77 /  20  30  20  20  10

&&

.TAE WATCHES/WARNINGS/ADVISORIES...
AL...NONE.
GA...NONE.
FL...NONE.
GM...NONE.
&&

CAMP/MROCZKA/AUSTIN/BLOCK

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TALLAHASSEE FL
550 AM EDT WED AUG 5 2009

ALZ065>069-FLZ007>019-026>029-034-GAZ120>131-142>148-155>161-
GMZ730-750-755-765-770-775-061000-
COFFEE-DALE-HENRY-GENEVA-HOUSTON-INLAND WALTON-COASTAL WALTON-
HOLMES-WASHINGTON-JACKSON-BAY-CALHOUN-GULF-FRANKLIN-GADSDEN-LEON-
JEFFERSON-MADISON-LIBERTY-WAKULLA-TAYLOR-LAFAYETTE-DIXIE-QUITMAN-
CLAY-RANDOLPH-TERRELL-DOUGHERTY-LEE-WORTH-TURNER-TIFT-BEN HILL-
IRWIN-EARLY-MILLER-BAKER-MITCHELL-COLQUITT-COOK-BERRIEN-SEMINOLE-
DECATUR-GRADY-THOMAS-BROOKS-LOWNDES-LANIER-
APALACHEE BAY OR COASTAL WATERS FROM KEATON BEACH TO OCHLOCKONEE
RIVER FL OUT TO 20 NM-
COASTAL WATERS FROM APALACHICOLA TO DESTIN FL OUT 20 NM-
COASTAL WATERS FROM  OCHLOCKONEE RIVER TO APALACHICOLA FL OUT TO
20 NM-
COASTAL WATERS FROM  SUWANNEE RIVER TO KEATON BEACH OUT 20 NM-
WATERS FROM APALACHICOLA TO DESTIN FL FROM 20 TO 60 NM-
WATERS FROM  SUWANNEE RIVER TO APALACHICOLA FL FROM 20 TO 60 NM-
550 AM EDT WED AUG 5 2009 /450 AM CDT WED AUG 5 2009/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST ALABAMA...
SOUTHWEST AND SOUTH CENTRAL GEORGIA...AND THE FLORIDA BIG BEND
AND PANHANDLE...AND ADJACENT COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT...
ANOTHER DAY OF SCATTERED SHOWERS AND THUNDERSTORMS IS EXPECTED
ACROSS THE REGION. SHOWERS AND STORMS WILL BE ONGOING THIS MORNING
NEAR THE FLORIDA GULF COAST. THESE STORMS ARE EXPECTED TO SPREAD
INLAND LATER TODAY WITH THE SEA BREEZE AND BECOME MOST
CONCENTRATED ACROSS THE FLORIDA BIG BEND AND SOUTHERN GEORGIA.
SOME OF THESE STORMS WILL HAVE THE POTENTIAL TO PRODUCE FREQUENT
CLOUD TO GROUND LIGHTNING...GUSTY WINDS UP TO 50 MPH...AND VERY
HEAVY RAINFALL.

LATER TONIGHT...THE POTENTIAL EXISTS FOR A COMPLEX OF STRONG
STORMS TO MOVE SOUTHWARD OUT OF CENTRAL ALABAMA INTO THE AREA. DUE
TO THIS POSSIBILITY...RAIN CHANCES WILL REMAIN ELEVATED ACROSS
SOUTHEAST ALABAMA AND SOUTHWESTERN GEORGIA THROUGH THE NIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...
CONTINUED AFTERNOON SHOWERS AND THUNDERSTORMS CAN BE EXPECTED ON
THURSDAY WITH A GENERAL DECREASE IN COVERAGE OF THESE STORMS INTO
THE WEEKEND AS A LARGE AREA OF HIGH PRESSURE BUILDS OVER THE
SOUTH. AS THIS HIGH PRESSURE MOVES OVER THE SOUTHEAST...THE
POTENTIAL FOR SOME VERY HOT AND HUMID DAYS EXISTS...ESPECIALLY BY
THE FIRST OF THE WEEK WHEN HIGH TEMPERATURES MAY REACH INTO THE
UPPER 90S.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT ANTICIPATED FOR TODAY.

FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE
WEBSITE ON THE INTERNET AT WEATHER.GOV...THEN CLICK ON YOUR AREA
OF INTEREST ON THE NATIONAL MAP.

38-GODSEY

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SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
444 PM EDT WED AUG 5 2009

GAZ142-143-155-156-052145-
DECATUR-EARLY-MILLER-SEMINOLE-
444 PM EDT WED AUG 5 2009

...A SIGNIFICANT WEATHER ALERT IS IN EFFECT FOR DECATUR
...EARLY...MILLER AND SEMINOLE COUNTIES IN SOUTHWEST GEORGIA...

* UNTIL 545 PM EDT

AT 441 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS 7 MILES WEST OF COLQUITT...MOVING
SOUTHEAST AT 15 MPH.

WINDS 40 TO 50 MPH ARE EXPECTED WITH THESE STORMS.

THIS STORM IS CAPABLE OF PRODUCING TORRENTIAL DOWNPOURS WHICH MAY
CAUSE LOCALIZED FLOODING OF STREETS AND LOW LYING AREAS...AND IS ALSO
PRODUCING FREQUENT CLOUD TO GROUND LIGHTNING. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

RELAY REPORTS OF SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE
IN TALLAHASSEE AT (8 5 0) 9 4 2 8 8 3 3. OR...YOU MAY CONTACT THE
NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT.
THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

85-GIBBS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
511 PM EDT WED AUG 05 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0330 PM     TSTM WND DMG     E WEBB RD/ROSS CLARK CI 31.24N 85.37W
08/05/2009                   HOUSTON            AL   EMERGENCY MNGR

            FIVE VEHICLES DAMAGED...SOME MINOR BUILDING DAMAGE AT
            HOUSTON COUNTY ROAD DEPARTMENT FACILITY.

&&

WATSON

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