Special Weather Statement, NWS Jacksonville, FL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
230 PM EDT SUN JUL 31 2011

.SHORT TERM...CONVECTIVE TEMPERATURE HAS BEEN REACHED WITH DOPPLER
RADARS SHOWING SHOWERS AND THUNDERSTORMS QUICKLY FORMING ACROSS
NORTHEAST FLORIDA WITH LIMITED COVERAGE NOTED ACROSS SOUTHEAST
GEORGIA. FOR THE REMAINDER OF THIS AFTERNOON...SHOWERS AND STORMS
WILL LIKELY QUICKLY FILL IN ACROSS NORTHEAST FLORIDA WITH ACTIVITY
INCREASING ACROSS SOUTHEAST GEORGIA LATER THIS AFTERNOON AS A
SHORTWAVE TROUGH IS FORECAST TO REACH THIS AREA LATE IN THE DAY.
SHOWERS AND STORMS WILL PROVIDE RELIEF FROM THE HEAT AS
TEMPERATURES HAVE ALREADY SOARED INTO THE MID AND UPPER 90S WITH
HEAT INDICES BETWEEN 100 AND 110 DEGREES.

WITH SUCH AN UNSTABLE ATMOSPHERE...SHOWERS AND STORMS WILL LINGER
WELL INTO THE EVENING HOURS. THUS...HAVE INCLUDED CHANCE POPS FOR
MUCH OF THE FORECAST AREA.

STRONG MID/UPPER LEVEL RIDGE THAT HAS BEEN ANCHORED ACROSS THE
AREA THE LAST SEVERAL DAYS IS FORECAST TO TEMPORARILY WEAKEN EARLY
NEXT WEEK...WITH SERIES OF SHORTWAVE TROUGHS DROPPING SOUTHWARD
OVER THE EASTERN SEABOARD AND CARVING A LARGE SCALE TROUGH. ALTHOUGH
TEMPERATURES WILL REMAIN ABOVE NORMAL...READINGS WILL NOT BE
AS OPPRESSIVE WITH FORECAST HIGHS IN THE LOWER TO MID 90S.

STRONGEST DYNAMICS ARE FORECAST TO ARRIVE MONDAY. THIS COUPLED
WITH CONTINUED HIGH ATMOSPHERIC MOISTURE WILL WARRANT LIKELY
POPS ACROSS THE FORECAST AREA.

DRIER AIR WILL BEGIN TO WORK INTO THE AREA FROM THE NORTH ON
TUESDAY AS LONG-WAVE TROUGH EXITS OFFSHORE AND HIGH PRESSURE RIDGE
SLOWLY RETURNS. HAVE INCLUDED CHANCE POPS ACROSS NORTHEAST
DECREASING TO SLIGHT CHANCE POPS ACROSS SOUTHEAST GEORGIA.

HOT READINGS WILL RETURN WEDNESDAY WITH UPPER 90S COMMON ACROSS
THE INTERIOR. HAVE MAINTAINED LIMITED RAIN CHANCES WITH HIGHEST
/30 PERCENT POPS/ RESERVED FOR INTERIOR NORTHEAST FLORIDA.

.LONG TERM...HOT TEMPERATURES WITH LIMITED RAIN CHANCES ARE
FORECAST THURSDAY. RAIN CHANCES WILL INCREASE FRIDAY AND INTO NEXT
WEEKEND AS HIGH PRESSURE RIDGE ONCE AGAIN WEAKENS ACROSS THE
FORECAST AREA.

LOW PRESSURE SYSTEM WELL EAST OF THE WINDWARD ISLANDS IS FORECAST
TO STRENGTHEN INTO A TROPICAL CYCLONE DURING THE NEXT 48 HOURS AS
IT TRACKS TOWARDS THE WEST-NORTHWEST. THERE IS MUCH UNCERTAINTY
WITH THIS FEATURE AND INTERESTS ARE URGED TO CLOSELY MONITOR THE
LATEST FORECAST.

&&

.AVIATION...HAVE TSRA IN ALL TAFS TIL AROUND 00Z AS SCATTERED
THUNDERSTORMS CONTINUE TO DEVELOP THIS AFTERNOON. PATCHY FOG
POSSIBLE LATE TONIGHT/EARLY MONDAY WITH MVFR VSBYS MAINLY AT GNV AND
VQQ.

&&

.MARINE...SW WINDS WILL INCREASE DUE TO NIGHTLY SURGE AGAIN TONIGHT
APPROACHING SCEC. NO HEADLINES FOR NOW. WINDS WILL CONTINUE TO
BECOME S TO SE DUE TO AFTERNOON SEABREEZES. SEAS WILL REMAIN IN 2 TO
4 FOOT RANGE.

RIP CURRENTS: LOW RISK WILL CONTINUE THROUGH MONDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  76  96  75  97 /  40  60  30  20
SSI  80  91  79  91 /  30  50  40  20
JAX  77  93  75  94 /  30  60  30  30
SGJ  78  91  77  92 /  20  60  30  30
GNV  76  92  75  93 /  40  60  20  40
OCF  75  93  75  93 /  30  50  20  50

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
GA...NONE.
AM...NONE.
&&

ZAPPE/ZIBURA/KEEGAN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
538 AM EDT SUN JUL 31 2011

FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-010945-
HAMILTON-SUWANNEE-COLUMBIA-BAKER-NASSAU-DUVAL-UNION-BRADFORD-CLAY-
ST JOHNS-GILCHRIST-ALACHUA-PUTNAM-FLAGLER-MARION-COFFEE-
JEFF DAVIS-BACON-APPLING-WAYNE-ATKINSON-WARE-PIERCE-BRANTLEY-
INLAND GLYNN-COASTAL GLYNN-ECHOLS-CLINCH-CHARLTON-INLAND CAMDEN-
COASTAL CAMDEN-
538 AM EDT SUN JUL 31 2011

...HEAT INDICES 105 TO 110 TODAY...

...A FEW STORMS MAY BECOME STRONG TODAY AND TOMORROW....

THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA.

.DAY ONE...TODAY AND TONIGHT...

SCATTERED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EARLY
EVENING...PARTICULARLY BETWEEN I-75 AND I-95. ISOLATED STRONG WIND
GUSTS WILL BE POSSIBLE WITH THESE STORMS.

HIGHS IN THE MID TO UPPER 90S WILL RESULT IN HEAT INDICES BETWEEN
105 AND 110 DEGREES TODAY.

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

THUNDERSTORMS WILL BECOME NUMEROUS ON MONDAY. A FEW OF THESE
STORMS COULD PRODUCE DAMAGING WIND GUSTS.

THUNDERSTORM CHANCES WILL BE LOWER THAN NORMAL TUESDAY THROUGH
SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT REQUESTED AT THIS TIME.

FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE
IN JACKSONVILLE WEBSITE ON THE INTERNET AT WEATHER.GOV/JAX.

JDS

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