FNUS52 KKEY 150903
FWFKEY

Fire Weather Planning Forecast for the Florida Keys
National Weather Service Key West FL
503 AM EDT Fri May 15 2026

...DISPERSION INDICES LESS THAN 20 ARE EXPECTED THIS AFTERNOON...

.Discussion...
The pressure gradient across the Florida Keys will be weakening
today, resulting in winds becoming light and variable by this
afternoon. Expect dispersion indices to fall below 20, especially
across the Lower and Middle Keys. Drier air is also filtering in
across the Keys, which will result in min RH values falling to
near or slightly below 50 percent this afternoon. Moisture will
return in earnest by Saturday evening, leading to an increase in
rain chances and higher humidities.


FLZ076>078-152345-
Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys-
Including the cities of Key Largo, Marathon, and Key West
503 AM EDT Fri May 15 2026

                      Today        Tonight      Sat

Cloud Cover           Clear        Mclear       Mclear
Chance Precip (%)     0            0            20
Chance of Thunder (%) 0            0            20
Weather Type          None         None         Tstms
Max/Min Temp          88           78           90
Min/Max RH %          54           78           62
Wind 20ft AM (mph)    NW  5                     E  5
Wind 20ft PM (mph)    Lgt/Var      Lgt/Var      E  8
Precip Duration                                 1
Precip Begin                                    8 AM
Precip End                                      Continuing
Precip Amount         0.00         0.00         0.03
Mixing Hgt(ft-agl)    3000         2000         3600
Transport Wnd (mph)   NW  6        S  6         SE 12
Dispersion Index      21           3            40
Max LVORI             3            4            3

Remarks...None.

$$

.FORECAST FOR DAYS 3 THROUGH 7...
.SATURDAY NIGHT...Partly cloudy with a chance of showers and a
slight chance of thunderstorms. Lows around 80. East winds around
10 mph.
.SUNDAY...Mostly sunny with a chance of showers and a slight
chance of thunderstorms. Highs in the upper 80s. East winds
around 10 mph.
.SUNDAY NIGHT...Partly cloudy with a chance of showers and a
slight chance of thunderstorms. Lows in the lower 80s. East winds
around 10 mph.
.MONDAY...Mostly sunny with a chance of showers and a slight
chance of thunderstorms. Highs in the upper 80s. East winds
around 10 mph.
.MONDAY NIGHT...Partly cloudy with a slight chance of showers and
thunderstorms. Lows in the lower 80s. East winds around 15 mph.
.TUESDAY...Sunny with a slight chance of showers and
thunderstorms. Highs in the upper 80s. East winds around 10 mph.
.TUESDAY NIGHT...Partly cloudy with a slight chance of showers
and thunderstorms. Lows around 80. East winds around 10 mph.
.WEDNESDAY...Sunny with a slight chance of showers and
thunderstorms. Highs in the upper 80s. East winds around 10 mph.
.WEDNESDAY NIGHT...Partly cloudy with a slight chance of showers
and thunderstorms. Lows in the lower 80s. East winds around
10 mph.
.THURSDAY...Sunny with a slight chance of showers and
thunderstorms. Highs in the upper 80s. East winds around 5 mph.

$$