120
FNUS52 KKEY 210859
FWFKEY
FIRE WEATHER PLANNING FORECAST FOR THE FLORIDA KEYS
NATIONAL WEATHER SERVICE KEY WEST FL
459 AM EDT SUN JUN 21 2026
...DISPERSION INDICES BELOW 20 EXPECTED THIS AFTERNOON ACROSS THE
FLORIDA KEYS...
DISCUSSION
RAIN CHANCES WILL REMAIN AT 10 PERCENT OR LESS DURING THE DAY.
CHANCES MAY TICK UP SLIGHTLY TONIGHT AS CONVECTION DEVELOPS ACROSS
THE SOUTHERN MAINLAND THIS AFTERNOON AND THEN SPREADS SOUTHWEST
ACROSS THE ISLAND CHAIN. AFTERNOON MIN RH VALUES WILL FALL ONLY
INTO IN THE 60 PERCENTILE AND RECOVER OVERNIGHT INTO THE LOWER 80
PERCENTILE. LIGHT TO GENTLE SOUTHEASTERLY BREEZES WILL BRIEFLY
WEAKEN TO LIGHT AND VARIABLE THIS AFTERNOON WITH DISPERSION
INDICES EXPECTED TO BE BELOW 20.
FLZ076>078-212315-
MONROE UPPER KEYS-MONROE MIDDLE KEYS-MONROE LOWER KEYS-
INCLUDING THE CITIES OF KEY LARGO, MARATHON, AND KEY WEST
459 AM EDT SUN JUN 21 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
CHANCE PRECIP (%) 10 20 10
CHANCE OF THUNDER (%) 10 20 10
WEATHER TYPE TSTMS TSTMS TSTMS
MAX/MIN TEMP 91 83 92
MIN/MAX RH % 62 83 63
WIND 20FT AM (MPH) SE 5 SE 6
WIND 20FT PM (MPH) LGT/VAR LGT/VAR SE 5
PRECIP DURATION 1 1 1
PRECIP BEGIN 6 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
PRECIP AMOUNT 0.00 0.00 0.00
MIXING HGT(FT-AGL) 3000 1500 3500
TRANSPORT WND (MPH) S 5 NE 12 SE 9
DISPERSION INDEX 17 5 38
MAX LVORI 4 5 4
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
MONDAY NIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 80S. SOUTHEAST WINDS AROUND 5 MPH.
TUESDAY
MOSTLY SUNNY WITH A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE LOWER 90S. SOUTHEAST WINDS AROUND
5 MPH.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 80S. EAST WINDS
AROUND 5 MPH.
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 90S. EAST WINDS
AROUND 5 MPH.
WEDNESDAY NIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS. LOWS IN THE LOWER 80S. SOUTHEAST WINDS AROUND
5 MPH.
THURSDAY
SUNNY WITH A SLIGHT CHANCE OF SHOWERS. HIGHS AROUND
90. EAST WINDS AROUND 5 MPH.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 80S. SOUTHEAST
WINDS AROUND 10 MPH.
FRIDAY
SUNNY WITH A SLIGHT CHANCE OF SHOWERS. HIGHS AROUND 90.
SOUTHEAST WINDS AROUND 5 MPH.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 80S. EAST WINDS
AROUND 5 MPH.
SATURDAY
SUNNY WITH A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS AROUND 90. SOUTHEAST WINDS AROUND 5 MPH.
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