Special Weather Statement, NWS Tallahassee, FL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
915 PM EDT SUN JUL 31 2011

.UPDATE (REST OF TONIGHT)...
01Z WATER VAPOR AND H4 RUC ANALYSIS SHOWS A LARGE AND DOMINANT UPPER
RIDGE PARKED OVER THE CENTRAL PORTION OF THE COUNTRY. AN EXTENSION
OF THIS RIDGE EXTENDS EASTWARD ALONG THE NORTHERN GULF COAST...OVER
OUR HEADS AND OFF THE SOUTHEAST ATLANTIC COAST. THE OVERALL HEIGHTS
DID COME DOWN A BIT FROM SATURDAY AS THE RIDGE CENTER RETROGRADED
WESTWARD...AND THIS DECREASE IN OVERALL SUPPRESSION ALLOWED A GOOD
COVERAGE OF SHOWERS AND STORMS THROUGH THE DAYLIGHT HOURS..THROUGH A
GOOD PORTION OF THE AFTERNOON...SATELLITE IMAGERY WAS SHOWING A
RATHER UNEXPECTED AREA OF SUPPRESSED CLOUDS FROM AROUND TALLAHASSEE
NORTHEASTWARD INTO SOUTH-CENTRAL GEORGIA. ON EITHER SIDE OF THIS
AREA STORMS WERE QUITE ACTIVE. AN ANALYSIS OF WATER VAPOR IMAGERY
SHOWED A SMALL AREA OF ENHANCED MID-LEVEL DRY AIR OVERTOP THIS
SUPPRESSED REGION. GOES TO SHOW HOW DIFFICULT CONVECTIVE FORECASTING
CAN BE AROUND THESE PARTS DURING THE SUMMER AS EVEN A SUBTLE AND
SMALL AREA OF DRIER AIR ALOFT CAN KEEP YOUR AREA DRY WHILE OTHER
DEAL WITH THE STORMS. EVENTUALLY BY THIS EVENING...THE ADDED FOCUS
FROM THE ARRIVING SEA-BREEZE AND OTHER CONVECTIVELY DRIVEN
MESO-SCALE BOUNDARIES WAS ABLE TO OVERCOME THE DRY AIR ALOFT AND
ALLOWED THE STORMS TO FINALLY FILL IN THIS VOID.

THE LINGERING STORMS THIS EVENING ARE STILL HEALTHY IN SPOTS OVER
SOUTHERN GEORGIA AND WILL LIKELY PERSIST FOR ANOTHER HOUR OR SO
BEFORE FINALLY WINDING DOWN. THEREAFTER THROUGH THE EARLY MORNING
HOURS WILL EXPECT A MOST DRY OVERNIGHT PERIOD WITH LOW TEMPERATURES
IN THE 70S. DEVELOPING FEEBLE LAND BREEZE MAY BE ENOUGH TO GET A FEW
ISOLATED OFFSHORE SHOWERS GOING TOWARD SUNRISE...HOWEVER HI-RES
MODEL SUITE IS UNANIMOUS IN NOT SHOWING MUCH IN THE WAY OF
ACTIVITY.

OVERALL PATTERN CONTINUES TO HINT AT AN EVEN MORE ACTIVE DAY IN
TERMS OF SHOWERS AND STORMS ON MONDAY...ESPECIALLY THE SOUTHERN
2/3RDS OF THE REGION. SOME DRIER AIR MAY SINK FAR ENOUGH SOUTH TO
REACH OUR FAR NORTHERN AREA. TOUGH TO TELL AT THIS POINT...BUT
ANYWHERE SOUTH OF OF DOTHAN TO ALBANY/TIFTON LOOKS TO HAVE A GOOD
SHOT AT SEEING OR BEING IN PROXIMITY TO STORMS DURING MONDAY
AFTERNOON/EVENING. CURRENT POPS FOR THESE AREAS ARE IN THE LIKELY
CATEGORY AROUND 60%.

OTHER CHANGE IS THE ADDITION OF A HEAT ADVISORY MONDAY AFTERNOON
FOR THE COASTAL COUNTIES FROM FRANKLIN COUNTY WESTWARD TO WALTON
COUNTY. PAST SEVERAL DAYS HAVE SEEN HEAT INDICES ACROSS THE ADVISORY
AREA PEAK BETWEEN 110 AND 113 DEGREES. SIMILAR CONDITIONS ARE
EXPECTED MONDAY AFTERNOON DUE TO DEWPOINTS AT TIMES FLIRTING WITH
79-80 DEGREES. COASTAL AREAS FURTHER EAST WILL BE MONITORED
OVERNIGHT ALTHOUGH CURRENTLY HEAT INDICES ARE FORECAST TO PEAK JUST
UNDER HEAT ADVISORY CRITERIA.

&&

.SHORT TERM (MONDAY THROUGH TUESDAY NIGHT)...THE EASTERN EXTENT OF
THE DOMINANT RIDGE IS FORECAST TO WEAKEN SOMEWHAT OVER THE NEXT 24
TO 36 HOURS AS AN UPPER TROUGH DEEPENS ALONG THE EASTERN SEABOARD.
THIS WILL ALLOW THE WEAK SFC TROUGH CURRENTLY ACROSS CENTRAL GA/AL
TO SLIDE SOUTH ON MONDAY...ALONG WITH SOME WEAK UPPER ENERGY. THESE
FACTORS SHOULD COMBINE TO INCREASE CONVECTIVE COVERAGE MONDAY
AFTERNOON...ESPECIALLY ACROSS THE SOUTHERN HALF OF THE FORECAST AREA
WHERE THE SFC TROUGH AND SEABREEZE ARE LIKELY TO INTERACT. WILL HAVE
LIKELY POPS FOR THIS AREA WITH HIGH CHANCE POPS FOR THE NORTHERN
TIER.

THE GREATER PRECIP COVERAGE SHOULD RESULT IN SLIGHTLY LOWER MAX
TEMPS FOR MONDAY AFTERNOON...ALTHOUGH WITH THE RELATIVELY LATE
START TO CONVECTIVE INITIATION DUE TO PREVAILING LOW-LEVEL
NORTHERLY FLOW...THE RELIEF WILL BE LIMITED...ESPECIALLY ACROSS
THE NORTHERN TIER. IF CONVECTIVE COVERAGE IS MORE LIMITED THAN
EXPECTED FOR MONDAY...INTERIOR AREAS MAY FLIRT WITH HEAT ADVISORY
CRITERIA.

BY TUESDAY...THE SFC TROUGH IS FORECAST TO WASH OUT WITH DRIER
AND WARMER AIR MOVING IN ALOFT. THIS WILL TEND TO PUT A DAMPER ON
CONVECTION AND ALLOW FOR WARMER TEMPERATURES TUESDAY AFTERNOON.
WILL KEEP POPS IN THE LOW- TO MID-CHANCE RANGE WITH MAX TEMPS
PUSHING THE UPPER 90S. SFC DEWPOINTS ARE FORECAST TO BE IN THE
LOWER TO MID 70S FOR THE AFTERNOON...WHICH COULD PUSH HEAT INDICES
TO NEAR HEAT ADVISORY LEVELS.

&&

.AVIATION...THROUGH 00Z TUE.
EVENING TS MAY IMPACT ECP...TLH AND VLD THROUGH 02Z...EITHER
DIRECTLY OF IN THE VICINITY. OVERNIGHT...A BRIEF PERIOD OF MVFR VSBY
IS FORECAST AROUND DAWN AT DHN...ABY AND VLD. CONVECTION IS FORECAST
TO GET AN EARLIER START ON MON AND BE MORE WIDESPREAD. WE THEREFORE
DID NOT HESITATE TO INCLUDE TEMPO GROUPS FOR ECP...TLH AND VLD WITH
PROB30 GROUPS AT DHN AND ABY.

&&

.MARINE...THE SUBTROPICAL RIDGE AXIS WILL REMAIN SOUTH OF THE
WATERS THROUGH THE FORECAST PERIOD...KEEPING LIGHT SOUTHWEST FLOW
IN PLACE OVER THE WATERS. NO HEADLINES ANTICIPATED.

&&

.PRELIMINARY POINT TEMPS/POPS...
TALLAHASSEE   76  95  76  96  77 /  40  60  40  40  20
PANAMA CITY   78  94  78  90  79 /  30  40  30  30  20
DOTHAN        76  96  76  98  77 /  40  50  40  30  20
ALBANY        76  96  76  98  76 /  40  40  40  30  20
VALDOSTA      76  96  75  98  76 /  40  60  40  40  20
CROSS CITY    76  94  75  94  76 /  30  50  30  40  20
APALACHICOLA  79  93  79  91  80 /  30  40  30  30  10

&&

.TAE WATCHES/WARNINGS/ADVISORIES...
AL...NONE.
GA...NONE.
FL...HEAT ADVISORY FROM 1 PM EDT /NOON CDT/ TO 6 PM EDT /5 PM CDT/
     MONDAY FOR THE FOLLOWING ZONES: CENTRAL WALTON...COASTAL
     BAY...COASTAL FRANKLIN...COASTAL GULF...INLAND BAY...INLAND
     FRANKLIN...INLAND GULF...SOUTH WALTON.

GM...NONE.

&&

UPDATE...MROCZKA
AVIATION...WOOL
PREVIOUS DISCUSSION...CAMP

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1002 PM EDT SUN JUL 31 2011

ALZ065>069-FLZ007>019-026>029-034-108-112-114-115-118-127-128-134-
GAZ120>131-142>148-155>161-GMZ730-750-755-765-770-775-011000-
COFFEE-DALE-HENRY-GENEVA-HOUSTON-INLAND WALTON-CENTRAL WALTON-
HOLMES-WASHINGTON-JACKSON-INLAND BAY-CALHOUN-INLAND GULF-
INLAND FRANKLIN-GADSDEN-LEON-INLAND JEFFERSON-MADISON-LIBERTY-
INLAND WAKULLA-INLAND TAYLOR-LAFAYETTE-INLAND DIXIE-SOUTH WALTON-
COASTAL BAY-COASTAL GULF-COASTAL FRANKLIN-COASTAL JEFFERSON-
COASTAL WAKULLA-COASTAL TAYLOR-COASTAL 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-
1002 PM EDT SUN JUL 31 2011 /902 PM CDT SUN JUL 31 2011/

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...TONIGHT...

SCATTERED SHOWERS AND STORMS WILL DISSIPATE INTO THE EARLY MORNING
HOURS...WITH A MOSTLY DRY OVERNIGHT PERIOD AFTER MIDNIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

HEAT INDEX READING WILL REACH AROUND 105 DEGREES INLAND DURING THE
AFTERNOON HOURS. HOWEVER CLOSER TO THE COAST...DEWPOINTS BETWEEN
78 AND 80 DEGREES IN SPOTS WILL RESULT IN HEAT INDICES PEAKING
BETWEEN 110 AND 113 DEGREES DURING THE AFTERNOON. A HEAT ADVISORY
HAS BEEN ISSUED FOR OUR COASTAL ZONES FROM FRANKLIN COUNTY
WESTWARD TO WALTON COUNTY FOR THIS THREAT. COASTAL ZONES FURTHER
EAST ARE CURRENTLY FORECAST TO FALL JUST SHORT OF HEAT ADVISORY
CRITERIA. EITHER WAY CONDITIONS WILL BE HOT ONCE AGAIN ON MONDAY
AND PRECAUTIONS SHOULD BE TAKEN FOR ANYONE PLANNING PROLONGED OR
STRENUOUS OUTDOOR ACTIVITIES.

A GOOD CHANCE OF SHOWERS AND THUNDERSTORMS ARE EXPECTED ON MONDAY.
SOME MAY BE STRONG WITH GUSTY WINDS. BEGINNING TUESDAY..EXPECT TO
SEE A RETURN TO TYPICAL SUMMER AFTERNOON AND EVENING SHOWERS AND
THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

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.

14-MROCZKA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
957 PM EDT SUN JUL 31 2011

FLZ019-GAZ159-160-010245-
LOWNDES GA-BROOKS GA-MADISON FL-
957 PM EDT SUN JUL 31 2011

...A SIGNIFICANT WEATHER ADVISORY IS IN EFFECT FOR BROOKS...LOWNDES
AND MADISON COUNTIES...

* UNTIL 1045 PM EDT

AT 950 PM EDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A STRONG
THUNDERSTORM 6 MILES SOUTH OF VALDOSTA...OR NEAR I-75 AT EXIT 11...
MOVING SOUTH AT 15 MPH.

WINDS AROUND 40 MPH ARE EXPECTED WITH THIS STORM.

THIS STORM IS ALSO PRODUCING TORRENTIAL DOWNPOURS WHICH MAY CAUSE
LOCALIZED FLOODING OF STREETS AND LOW LYING AREAS...AND IS ALSO
PRODUCING NEARLY CONTINUOUS 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.

LAT...LON 3062 8318 3062 8326 3060 8325 3057 8326
      3051 8323 3051 8324 3057 8352 3084 8340
      3082 8319
TIME...MOT...LOC 0156Z 009DEG 12KT 3074 8331

18-WOOL

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1251 AM EDT MON AUG 1 2011

GAZ123>125-010530-
TERRELL GA-CALHOUN GA-DOUGHERTY GA-
1251 AM EDT MON AUG 1 2011

...A SIGNIFICANT WEATHER ADVISORY IS IN EFFECT FOR CALHOUN...WESTERN
DOUGHERTY AND SOUTHERN TERRELL COUNTIES...

* UNTIL 130 AM EDT

AT 1247 AM EDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A STRONG
THUNDERSTORM 15 MILES WEST OF ALBANY...OR NEAR CLARKS MILL...MOVING
SOUTH AT 20 MPH.

WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS STORM.

ALSO...FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS
STORM. 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.

LAT...LON 3144 8424 3144 8444 3145 8444 3145 8446
      3143 8450 3144 8451 3144 8470 3163 8459
      3164 8458 3162 8458 3163 8454 3170 8455
      3173 8453 3174 8432
TIME...MOT...LOC 0451Z 358DEG 17KT 3163 8441

42-DVD

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