783 
FXUS62 KJAX 121531
AFDJAX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1031 AM EST SAT JAN 12 2013

...FOGGY CONDITIONS PERSIST THROUGH NOON OVER PORTIONS OF THE
NEARSHORE COASTAL WATERS...
...NEAR RECORD HIGH TEMPERATURES EXPECTED THIS AFTERNOON...

.UPDATE...
MORNING SURFACE ANALYSIS DEPICTS ATLANTIC RIDGING (1024 MILLIBARS)
EXTENDING ITS AXIS OVER NORTH FLORIDA. ALOFT...DEEP LAYERED
RIDGING WAS CENTERED OVER THE BAHAMAS AND THE FLORIDA PENINSULA.
EMBEDDED IN THIS RIDGING IS A SMALL MOISTURE STARVED CIRCULATION
ALOFT THAT IS TRAVERSING NORTHEAST FLORIDA. STRONG SUBSIDENCE AND
UNSEASONABLY HIGH DEWPOINTS FOSTERED WIDESPREAD DENSE FOG
FORMATION DURING THE PREDAWN HOURS. VISIBLE SATELLITE IMAGERY AND
LATEST SURFACE OBSERVATIONS INDICATE THAT FOG IS SHRINKING IN
AREAL EXTENT...BUT PATCHES OF DENSE FOG PERSIST...MAINLY ALONG THE
ST. JOHNS RIVER AND OVER LOCATIONS NEAR THE ALTAMAHA RIVER IN
COASTAL SOUTHEAST GEORGIA. WE THUS EXPIRED THE DENSE FOG ADVISORY
OVER LAND AREAS...BUT HAVE KEPT THE ADVISORY IN PLACE FOR PORTIONS
OF THE ADJACENT NEARSHORE COASTAL WATERS THROUGH NOON.

RECORD HIGHS AT GAINESVILLE AND AT THE JACKSONVILLE INTERNATIONAL
AIRPORT...WHICH STAND AT 82 AND 83 DEGREES RESPECTIVELY...MAY BE
CHALLENGED THIS AFTERNOON. COOLER HIGH TEMPS WILL BE FOUND ALONG
THE COASTAL AREAS DUE TO AN AFTERNOON SEA BREEZE...WITH MID 70S
EXPECTED AT THE BEACHES. STRONG SUBSIDENCE ALOFT AND LOW PWATS WILL 
KEEP OUR AREA RAIN-FREE. AREAS OF DENSE FOG ARE EXPECTED TO 
REDEVELOP OVERNIGHT AS DEWPOINTS REMAIN HIGH...ALTHOUGH STRONGER 
SOUTHERLY BOUNDARY LAYER FLOW COULD RESULT IN LESS AREAL COVERAGE. 

&&

.AVIATION...VLIFR CONDITIONS HAVE IMPROVED TO VFR AT ALL SITES LESS 
VQQ WHERE LIFR CONTINUED. EXPECT THIS SITE WILL IMPROVE TO VFR 
WITHIN THE HOUR. CONTINUED WITH TEMPO MVFR AT SSI DUE TO MARINE FOG 
LINGERING JUST OFFSHORE. EXPECT WIDESPREAD LIFR TO VLIFR CONDITIONS 
AGAIN TONIGHT AT THE TERMINALS. 

&&

.MARINE...MARINE DENSE FOG ADVISORY FOR VISIBILITIES 1 NM OR LESS 
WILL CONTINUE THROUGH AT LEAST NOON. WILL MONITOR SATELLITE 
TRENDS...BUT SHORT TERM MODEL GUIDANCE INDICATES THAT MARINE FOG 
WILL PERSIST/DEVELOP AND EDGE INLAND ONCE AGAIN THIS EVENING INTO 
TONIGHT. WINDS SSE 10 KTS OR LESS AND SEAS 1-3 FT OVER THE COASTAL 
WATERS. 

RIP CURRENTS: LOW RISK OF RIP CURRENTS TODAY AND SUNDAY. 

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  80  57  78  57 /  10  10  10  10 
SSI  72  57  69  61 /   0   0  10  10 
JAX  81  56  80  58 /  10  10  10  10 
SGJ  77  58  77  60 /   0   0   0   0 
GNV  83  58  81  57 /  10  10   0   0 
OCF  84  59  81  56 /  10  10   0   0 

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...NONE
GA...NONE
AM...DENSE FOG ADVISORY UNTIL NOON EST TODAY FOR
     ALTAMAHA SOUND GA TO ST AUGUSTINE FL OUT 20 NM.

&&

$$

NELSON/ENYEDI/GUILLET