556
FNUS52 KKEY 310831
FWFKEY

Fire Weather Planning Forecast for the Florida Keys
National Weather Service Key West FL
431 AM EDT Mon Aug 31 2026

...DISPERSION INDICES LESS THAN 20 ARE EXPECTED ACROSS MUCH OF
THE REGION ON TUESDAY AFTERNOON...

.Discussion...
Chances of showers and thunderstorms expected for the next
several days as ample moisture remains across the Keys. Relative
humidity values are expected to recover to the upper 80s percent
overnight with min RH values in the mid 60s during the afternoon
hours. Generally, light to gentle east to southeasterly breezes
are expected for the next several days, occasionally becoming
gentle to moderate breezes. Dispersion indices are expected to be
generally poor to fair over the next couple of days.

FLZ076>078-010115-
Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys-
Including the cities of Key Largo, Marathon, and Key West
431 AM EDT Mon Aug 31 2026

                      Today        Tonight      Tue

Cloud Cover           Pcldy        Pcldy        Pcldy
Chance Precip (%)     30           30           40
Chance of Thunder (%) 30           30           40
Weather Type          Tstms        Tstms        Tstms
Max/Min Temp          90           82           90
Min/Max RH %          66           89           65
Wind 20ft AM (mph)    E  5                      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         0.04         0.13         0.04
Mixing Hgt(ft-agl)    3200         1500         3100
Transport Wnd (mph)   E  7         NE  8        E  5
Dispersion Index      30           5            17
Max LVORI             4            5            4

Remarks...None.

$$

.FORECAST FOR DAYS 3 THROUGH 7...
.TUESDAY NIGHT...Partly cloudy with a chance of showers and
thunderstorms. Lows in the lower 80s. East winds around 5 mph.
.WEDNESDAY...Mostly sunny with a chance of showers and
thunderstorms. Highs around 90. East winds around 5 mph.
.WEDNESDAY NIGHT...Mostly cloudy with showers likely and a chance
of thunderstorms. Lows in the lower 80s. East winds around 5 mph.
.THURSDAY...Mostly sunny with showers likely and a chance of
thunderstorms. Highs around 90. East winds around 5 mph.
.THURSDAY NIGHT...Mostly cloudy with showers and thunderstorms
likely. Lows in the lower 80s. East winds around 10 mph.
.FRIDAY...Mostly sunny with a chance of showers and
thunderstorms. Highs in the upper 80s. Southeast winds around
10 mph.
.FRIDAY NIGHT...Mostly cloudy with a chance of showers and
thunderstorms. Lows in the lower 80s. Southeast winds around
5 mph.
.SATURDAY...Mostly sunny with a chance of showers and
thunderstorms. Highs around 90. Southeast winds around 5 mph.
.SATURDAY NIGHT...Partly cloudy with a chance of showers and
thunderstorms. Lows in the lower 80s. Southeast winds around
5 mph.
.SUNDAY...Mostly sunny with a chance of showers and
thunderstorms. Highs in the upper 80s. Southeast winds around
5 mph.

$$

MJV