947
FNUS52 KKEY 170826
FWFKEY

Fire Weather Planning Forecast for the Florida Keys
National Weather Service Key West FL
426 AM EDT Mon Aug 17 2026

.Discussion...
Warmer than normal weather continues while a Saharan Air Layer
lingers over the Florida Keys. Temperatures in the lower 90s
are likely across the island chain while dew points stay in the
upper 70s. Relative humidity values are expected to recover into
the mid 80s during the overnight hours, but min RH values will
be able to drop into the lower 60s. Interiors of the largest
islands may observe dew points into the mid to upper 50s.
Collapsing winds suggest dispersion indices will be very low
throughout the week.

FLZ076>078-172330-
Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys-
Including the cities of Key Largo, Marathon, and Key West
426 AM EDT Mon Aug 17 2026

                      Today        Tonight      Tue

Cloud Cover           Mclear       Mclear       Mclear
Chance Precip (%)     0            0            0
Chance of Thunder (%) 0            0            0
Weather Type          None         None         None
Max/Min Temp          91           81           92
Min/Max RH %          62           85           61
Wind 20ft AM (mph)    Lgt/Var                   Lgt/Var
Wind 20ft PM (mph)    Lgt/Var      Lgt/Var      Lgt/Var
Precip Duration
Precip Begin
Precip End
Precip Amount         0.00         0.00         0.00
Mixing Hgt(ft-agl)    2300         1100         2800
Transport Wnd (mph)   E  7         NW  5        W  7
Dispersion Index      17           2            18
Max LVORI             4            5            4

Remarks...None.

$$

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

$$

AJP