318
FNUS52 KKEY 190844
FWFKEY
FIRE WEATHER PLANNING FORECAST FOR THE FLORIDA KEYS
NATIONAL WEATHER SERVICE KEY WEST FL
444 AM EDT SAT SEP 19 2026
DISCUSSION
AN UPPER LEVEL LOW WILL MOVE ACROSS THE CENTRAL FLORIDA PENINSULA
AND EVENTUALLY INTO THE EASTERN GULF WATERS LATER INTO THE
WEEKEND. THIS SYSTEM WILL BRING A WET WEATHER PATTERN ACROSS THE
KEYS OVER THE COMING DAYS. DAILY RAIN CHANCES WILL REMAIN WELL
ABOVE NORMAL WITH RAIN CHANCES PEAKING AROUND 60% TO 70% AND RH
VALUES BOTTOMING OUT IN THE MID 60S IN THE AFTERNOON AND RECOVER
INTO THE 80S OVERNIGHT. SURFACE WINDS WILL BE LIGHT TO GENTLE OUT
OF THE EAST TO NORTHEAST AT THE START OF THE WEEKEND BEFORE WINDS
SHIFT TO A MORE EAST TO SOUTHEAST DIRECTION LATER IN THE WEEKEND. RAIN
CHANCES WILL ALSO CONTINUE TO REMAIN ELEVATED INTO NEXT WEEK, AS
DEEP MOISTURE LINGERS ACROSS THE FLORIDA KEYS IN THE WAKE OF THE
DEPARTING WEATHER DISTURBANCE.
FLZ076>078-192315-
MONROE UPPER KEYS-MONROE MIDDLE KEYS-MONROE LOWER KEYS-
INCLUDING THE CITIES OF KEY LARGO, MARATHON, AND KEY WEST
444 AM EDT SAT SEP 19 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
CHANCE PRECIP (%) 50 50 50
CHANCE OF THUNDER (%) 50 50 50
WEATHER TYPE TSTMS TSTMS TSTMS
MAX/MIN TEMP 89 78 89
MIN/MAX RH % 65 91 67
WIND 20FT AM (MPH) LGT/VAR LGT/VAR
WIND 20FT PM (MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP DURATION 2 2 2
PRECIP BEGIN 6 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
PRECIP AMOUNT 0.19 0.12 0.18
MIXING HGT(FT-AGL) 3000 800 2800
TRANSPORT WND (MPH) NE 5 SE 7 SW 5
DISPERSION INDEX 13 5 15
MAX LVORI 5 5 5
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
SUNDAY NIGHT
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. LOWS AROUND 80. SOUTH WINDS AROUND 5 MPH.
MONDAY
PARTLY SUNNY WITH SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. HIGHS IN THE UPPER 80S. SOUTH WINDS AROUND 5 MPH.
MONDAY NIGHT
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. LOWS AROUND 80. SOUTH WINDS AROUND 5 MPH.
TUESDAY
PARTLY SUNNY WITH SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. HIGHS IN THE UPPER 80S. SOUTH WINDS AROUND 5 MPH.
TUESDAY NIGHT
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A CHANCE
OF THUNDERSTORMS. LOWS AROUND 80. SOUTHEAST WINDS AROUND 5 MPH.
WEDNESDAY
PARTLY SUNNY WITH SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. HIGHS IN THE UPPER 80S. SOUTHEAST WINDS AROUND
5 MPH.
WEDNESDAY NIGHT
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A CHANCE
OF THUNDERSTORMS. LOWS AROUND 80. SOUTHEAST WINDS AROUND 5 MPH.
THURSDAY
PARTLY SUNNY WITH SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. HIGHS IN THE UPPER 80S. EAST WINDS AROUND 5 MPH.
THURSDAY NIGHT
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS AROUND 80. EAST WINDS AROUND 5 MPH.
FRIDAY
MOSTLY SUNNY WITH SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. HIGHS IN THE UPPER 80S. EAST WINDS AROUND 5 MPH.
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