837  
FXUS62 KKEY 240127  
AFDKEY  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE KEY WEST FL  
927 PM EDT SUN JUL 23 2017  
   
DISCUSSION
 
   
CURRENTLY
 
 
KBYX DETECTS ISOLATED SHOWERS OVER THE COASTAL WATERS OF THE GULF  
OF MEXICO. ELSEWHERE, KBYX DETECTS NO PRECIPITATION ECHOES IN THE  
REMAINDER OF THE FORECAST AREA. SKIES OVER THE ISLAND CHAIN ARE  
VARIABLY CLOUDY. WINDS OVER LAND ARE EAST TO SOUTHEAST NEAR 10  
MPH. C-MAN WINDS, ON AVERAGE, ARE EAST TO SOUTHEAST AT 10 TO 15  
KNOTS. TEMPERATURES ARE IN THE MID 80S.  
   
SHORT TERM (OVERNIGHT)
 
 
IN THE LOW TO MID LEVELS OF THE ATMOSPHERE, AN ATLANTIC RIDGE OF  
HIGH PRESSURE WILL EXTEND ACROSS SOUTH CENTRAL FLORIDA OVERNIGHT.  
IN THE UPPER LEVELS OF THE ATMOSPHERE, AN AREA OF LOW PRESSURE  
WILL BE LOCATED OVER THE CENTRAL GULF OF MEXICO TONIGHT. THE 00Z  
KKEY SOUNDING IS VERY UNSTABLE, BUT QUITE DRY FOR THIS TIME OF  
YEAR, WITH A PRECIPITABLE WATER (PWAT) VALUE JUST UNDER ONE AND  
ONE HALF OF AN INCH. ATMOSPHERIC MOISTURE WILL INCREASE OVERNIGHT.  
BY SUNRISE MONDAY, PWAT VALUES WILL BE JUST BELOW ONE AND THREE  
QUARTERS OF AN INCH, WHICH IS STILL NEAR THE 25TH PERCENTILE FOR  
THE LATTER HALF OF JULY. THE RELATIVELY DRY AIR MASS IN PLACE WILL  
BE RESPONSIBLE FOR NO MORE THAN SLIGHT CHANCE POPS OVERNIGHT.  
 

 
   
MARINE
 
 
GENTLE TO MODERATE EAST TO SOUTHEAST BREEZES WILL PREVAIL ON ALL  
KEYS COASTAL WATERS OVERNIGHT. NO ADVISORIES OR CAUTIONARY  
HEADLINES EXPECTED TONIGHT THROUGH AT LEAST FRIDAY NIGHT.  
 

 
   
AVIATION
 
 
VFR CONDITIONS WILL PREVAIL OVERNIGHT AT THE KEY WEST AND MARATHON  
TERMINALS. ISOLATED SHOWERS ARE EXPECTED OVERNIGHT OVER THE  
FLORIDA STRAITS AND GULF WATERS, WITH SOME INCREASED POSSIBILITY  
FOR VICINITY SHOWERS DURING THE DAY MONDAY. EAST TO SOUTHEAST  
WINDS SHOULD REMAIN AROUND 10 KNOTS OUTSIDE OF ANY SHOWERS THROUGH  
THE TERMINAL FORECAST PERIOD.  
 

 
   
CLIMATE
 
 
ON THIS DATE IN FLORIDA KEYS WEATHER HISTORY, IN 1957, THE HIGH  
TEMPERATURE AT KEY WEST INTERNATIONAL AIRPORT WAS 95 DEGREES. THIS  
SET THE DAILY RECORD FOR MAXIMUM TEMPERATURE MEASURED IN KEY WEST  
ON JULY 23RD, A RECORD WHICH STILL STANDS 60 YEARS LATER.  
TEMPERATURE RECORDS AT KEY WEST DATE BACK TO 1872.  
 

 
   
KEY WATCHES/WARNINGS/ADVISORIES
 
 
FL...NONE.  
GM...NONE.  
 

 
 

 
 
PUBLIC/MARINE/FIRE...BS  
AVIATION/NOWCASTS....RIZZO  
DATA COLLECTION......VICKERY  
 
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