406
FNUS52 KKEY 210825
FWFKEY

Fire Weather Planning Forecast for the Florida Keys
National Weather Service Key West FL
425 AM EDT Fri Aug 21 2026

.Discussion...
Warmer than normal weather continues while rain chances slowly
increase in the coming days. Temperatures in the lower 90s are
likely across the island chain while dew points stay in the mid
to upper 70s. Relative humidity values are expected to recover
into the upper 70s to mid 80s during the overnight hours with min
RH values in the lower 60s during the afternoon hours. In
addition, a weak flow pattern with light and variable winds
suggest that dispersion indices will be poor through the remainder
of the week.


FLZ076>078-212315-
Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys-
Including the cities of Key Largo, Marathon, and Key West
425 AM EDT Fri Aug 21 2026

                      Today        Tonight      Sat

Cloud Cover           Pcldy        Pcldy        Pcldy
Chance Precip (%)     10           0            10
Chance of Thunder (%) 10           0            10
Weather Type          Tstms        None         Tstms
Max/Min Temp          91           82           92
Min/Max RH %          62           83           62
Wind 20ft AM (mph)    S  5                      SE  5
Wind 20ft PM (mph)    Lgt/Var      Lgt/Var      Lgt/Var
Precip Duration       1                         2
Precip Begin          6 AM                      8 AM
Precip End            6 PM                      Continuing
Precip Amount         0.00         0.00         0.00
Mixing Hgt(ft-agl)    2900         1600         3400
Transport Wnd (mph)   SE  7        SE  9        SE  7
Dispersion Index      26           7            24
Max LVORI             3            4            4

Remarks...None.

$$

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

$$