168  
FXUS62 KKEY 050939  
AFDKEY  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE KEY WEST FL  
539 AM EDT SAT JUL 5 2025  
   
..NEW DISCUSSION, MARINE, AVIATION  
 
   
DISCUSSION  
 
ISSUED AT 419 AM EDT SAT JUL 5 2025  
ACTIVITY HAS PICKED UP ACROSS THE FORECAST AREA DURING THE  
OVERNIGHT SHIFT, AND IT IS JUST A LITTLE BIT MORE ACTIVE THAN OUR  
PREVIOUS OVERNIGHT. LAST NIGHT, WE WERE LACKING A LIFTING  
MECHANISM TO GET ANYTHING GOING, BUT SOME LOWER LEVEL CONFLUENCE  
OVER THE PAST FEW HOURS HAS ENCOURAGED SOME SHOWERS IN THE AREA.  
AUTOMATED OBSERVATIONS ALONG THE ISLAND CHAIN SHOW RAINFALL  
AMOUNTS OF ONLY A FEW HUNDREDTHS OF AN INCH, WHICH ISN'T  
SURPRISING BECAUSE NOTHING ON RADAR HAS LOOKED PARTICULARLY  
IMPRESSIVE. RADAR ESTIMATED RAINFALL AMOUNTS FOR SHOWERS OVER THE  
NEARBY WATERS ALSO SHOW FAIRLY MEAGER VALUES, BUT THIS WILL LIKELY  
CHANGE DURING THE DAY TODAY WHEN DAYTIME HEATING CAN AID IN  
SETTING UP A MORE UNSTABLE ENVIRONMENT. IR IMAGERY FROM GOES-18  
SHOWS THAT THE IMPRESSIVE, DEEP CONVECTION IS WELL TO OUR  
NORTHEAST, ASSOCIATED WITH TROPICAL DEPRESSION THREE. OUR  
PROXIMITY TO THIS SYSTEM WILL RESULT IN SUSTAINED SOUTHWESTERLY  
FLOW TODAY, AND THIS COULD LEAD TO THE DEVELOPMENT FOR A REVERSE  
CLOUDLINE. ON TOP OF THAT, CIMSS PWAT CURRENTLY SHOWS VALUES OVER  
2 INCHES ACROSS MOST OF THE REGION. WE STILL HAVE A FEW HOURS  
BEFORE OUR 12Z BALLOON IS LAUNCHED, AND BEFORE WE CAN SEE A REAL-  
TIME VERTICAL PROFILE OF THE ATMOSPHERE, BUT CIRA LPW IMAGERY  
SUGGESTS THAT WE ARE FAIRLY MOIST BETWEEN THE SURFACE AND 500 MB.  
WITH THE ATMOSPHERE PRIMED, WE WILL CONTINUE TO LEAN ON 50 PERCENT  
POPS FOR TODAY, BUT BRING DOWN POPS FOR TONIGHT TO 40 PERCENT DUE  
TO A SLIVER OR RELATIVELY DRIER AIR EMBEDDED IN THE FLOW.  
 
AFTER TODAY, THE DISTURBANCES OFF OF THE SOUTHEASTERN COAST WILL  
LIFT TO THE NORTHEAST, AND RIDGING WILL BE THE DOMINATE PATTERN  
AGAIN ACROSS THE AREA. THE RIDGE AXIS LOOKS LIKE IT WILL LIFT  
THROUGH FLORIDA SOMETIME BETWEEN SUNDAY NIGHT AND MONDAY NIGHT. AN  
EMBEDDED POCKET OF DRIER AIR WILL HELP TO BRING POPS DOWN TO A  
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.  
 
WHAT HAPPENS AFTER THAT STILL BEARS GREAT UNCERTAINTY. GUIDANCE IS  
PICKING UP ON FLUCTUATING POPS AND SKY COVER OVER THE TUESDAY  
THROUGH THURSDAY TIMEFRAME. GLOBAL MODELS ARE RESOLVING EITHER A  
TUTT OR AN INVERTED RIDGE UNDERCUTTING THE HIGH PRESSURE. THIS IS  
REFLECTED IN THE POPS FLUCTUATING BETWEEN 20 AND 40 PERCENT OVER  
THE SECOND HALF OF THE WEEK, BUT THE PRECISE DETAILS WILL NEED TO  
BE WORKED OUT IN A FUTURE FORECAST PACKAGE SINCE WE ARE A LITTLE  
TOO FAR OUT FROM HONING IN ON ANY MEANINGFUL DETAILS.  
 
 
   
MARINE  
 
ISSUED AT 419 AM EDT SAT JUL 5 2025  
THERE ARE NO WATCHES, WARNINGS, OR ADVISORIES ISSUED FOR THE  
FLORIDA KEYS LOCAL WATERS. FROM SYNOPSIS, A DEEP TROUGH COMPLEX  
OVER THE SOUTHEAST US AND FLORIDA WILL MAINTAIN GENTLE SOUTHWEST  
BREEZES ACROSS THE FLORIDA KEYS THROUGH THE TODAY. AS THE TROUGH  
LIFTS NORTHEAST STARTING SUNDAY, A WEAK RIDGE AXIS WILL REBUILD  
ACROSS THE KEYS AND SOUTH FLORIDA, RESULTING IN A RETURN TO  
GENERALLY LIGHT TO GENTLE EASTERLY BREEZES.  
 
 
   
AVIATION  
 
(06Z TAFS)  
ISSUED AT 419 AM EDT SAT JUL 5 2025  
VFR CONDITIONS ARE EXPECTED TO PREVAIL AT THE TERMINALS THROUGH THE  
TAF PERIOD, THOUGH BRIEF TRANSIENT EPISODES OF MVFR CIGS AND  
VISIBILITIES ARE POSSIBLE AS SKY COVERAGE WAXES AND WANES AND WITH  
ANY PASSING SHOWERS. VCTS HAS BEEN INCLUDED IN THE TAFS THROUGH  
18Z DUE TO ELEVATED (50%) CHANCES, BUT IT'S LIKELY THAT MOST TIME  
BETWEEN NOW AND THEN WILL BE TS-FREE. WINDS ARE EXPECTED TO CONTINUE  
TO REMAIN FROM THE SOUTHWEST AT 5 TO 10 KNOTS, THOUGH HIGHER GUSTS  
ARE POSSIBLE WITH PASSING SHOWERS.  
 
 
   
CLIMATE  
 
IN 2021, TROPICAL STORM ELSA MOVED ROUGHLY 55 MILES WEST OF KEY WEST  
LATE JULY 5TH THROUGH EARLY AFTERNOON JULY 6TH, WITH THE CENTER OF  
THE STORM PASSING IN BETWEEN KEY WEST AND THE DRY TORTUGAS. IT  
PRODUCED MAXIMUM SUSTAINED WINDS OF 52 MPH AT KEY WEST INTERNATIONAL  
AIRPORT AND 48 KNOTS AT SMITH SHOAL LIGHT, WITH WIND GUSTS TO 70 MPH  
AND 58 KNOTS, RESPECTIVELY. RAINFALL TOTALS WERE THE HIGHEST IN KEY  
WEST AS WELL WITH KEY WEST INTERNATIONAL AIRPORT MEASURING 4.49  
INCHES, THE NWS KEY WEST OFFICE MEASURING 6.62 INCHES, WITH A  
MAXIMUM RAINFALL AMOUNT OF 7.54 INCHES ON CATHERINE STREET IN KEY  
WEST. NO SIGNIFICANT IMPACTS WERE NOTED FROM TROPICAL STORM ELSA  
WITH THE EXCEPTION OF SIGNIFICANT STREET FLOODING OF 6 TO 10 INCHES  
IN DEPTH IN OLD TOWN AND MIDTOWN KEY WEST AS STRONG RAIN BANDS WITH  
HIGH RAINFALL RATES MOVED ACROSS THE ISLAND. OTHERWISE, MOST DAMAGE  
WAS CONFINED TO WIDELY-SEPARATED DOWNED TREE LIMBS FROM KEY WEST TO  
THE SADDLEBUNCH KEYS DUE TO NEARLY 13 HOURS OF TROPICAL-STORM-FORCE  
GUSTS.  
 
 
   
PRELIMINARY POINT TEMPS/POPS  
 
KEY WEST 90 82 91 82 / 50 40 20 20  
MARATHON 89 81 89 82 / 50 40 20 20  
 
 
   
KEY WATCHES/WARNINGS/ADVISORIES  
 
FL...NONE.  
GM...NONE.  
 
 
 
 
PUBLIC/MARINE/FIRE...DP  
AVIATION/NOWCASTS....MC  
DATA ACQUISITION.....MC  
 
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