620
FNUS52 KKEY 310907
FWFKEY

Fire Weather Planning Forecast for the Florida Keys
National Weather Service Key West FL
507 AM EDT Sun May 31 2026

.Discussion...
A moist air mass remains in place, and will keep the environment
primed for occasional showers and thunderstorms depending on
whether or not we can get a source of lift. Light and variable
winds may also become southwesterly at times during the day, which
would support cloundline development and periods of slow moving
showers over the Keys. Relative humidity values will stay elevated
while this air mass lingers with nighttime minimums around 64 to
70 percent, and recovering to near 90 percent during the daytime.

FLZ076>078-010030-
Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys-
Including the cities of Key Largo, Marathon, and Key West
507 AM EDT Sun May 31 2026

                      Today        Tonight      Mon

Cloud Cover           Pcldy        Pcldy        Pcldy
Chance Precip (%)     20           10           20
Chance of Thunder (%) 20           10           20
Weather Type          Tstms        Tstms        Tstms
Max/Min Temp          89           80           89
Min/Max RH %          65           91           66
Wind 20ft AM (mph)    Lgt/Var                   Lgt/Var
Wind 20ft PM (mph)    Lgt/Var      Lgt/Var      Lgt/Var
Precip Duration       1            1            1
Precip Begin          6 AM         Continuing   Continuing
Precip End            Continuing   Continuing   6 PM
Precip Amount         0.14         0.01         0.02
Mixing Hgt(ft-agl)    3200         500          3200
Transport Wnd (mph)   W  7         S  5         W  6
Dispersion Index      20           3            18
Max LVORI             5            6            5

Remarks...None.

$$

.FORECAST FOR DAYS 3 THROUGH 7...
.MONDAY NIGHT...Mostly cloudy. Lows in the lower 80s. Southwest
winds around 5 mph.
.TUESDAY...Mostly cloudy with a slight chance of showers and
thunderstorms. Highs in the upper 80s. Light winds.
.TUESDAY NIGHT...Mostly cloudy with a slight chance of showers
and thunderstorms. Lows around 80. Southwest winds around 5 mph.
.WEDNESDAY...Mostly cloudy with a chance of showers and
thunderstorms. Highs in the upper 80s. Light winds.
.WEDNESDAY NIGHT...Cloudy with showers likely and a chance of
thunderstorms. Lows in the upper 70s. Northeast winds around
5 mph.
.THURSDAY...Mostly cloudy with showers likely and a chance of
thunderstorms. Highs in the upper 80s. Northeast winds around
10 mph.
.THURSDAY NIGHT...Mostly cloudy with a chance of showers and
thunderstorms. Lows in the upper 70s. Northeast winds around
10 mph.
.FRIDAY...Mostly sunny with a chance of showers and
thunderstorms. Highs in the upper 80s. East winds around 10 mph.
.FRIDAY NIGHT...Partly cloudy with a chance of showers and a
slight chance of thunderstorms. Lows in the upper 70s. East winds
around 10 mph.
.SATURDAY...Sunny with a slight chance of showers and
thunderstorms. Highs in the upper 80s. East winds around 10 mph.

$$