308
FNUS52 KKEY 190927
FWFKEY

Fire Weather Planning Forecast for the Florida Keys
National Weather Service Key West FL
527 AM EDT Wed Aug 19 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
mid to 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 during the
afternoon hours. In addition, collapsing winds with a light and
variable flow pattern suggests that dispersion indices will be
very low through the remainder of the week.

FLZ076>078-192315-
Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys-
Including the cities of Key Largo, Marathon, and Key West
527 AM EDT Wed Aug 19 2026

                      Today        Tonight      Thu

Cloud Cover           Pcldy        Pcldy        Pcldy
Chance Precip (%)     0            10           0
Chance of Thunder (%) 0            10           0
Weather Type          None         Tstms        None
Max/Min Temp          93           82           92
Min/Max RH %          61           87           64
Wind 20ft AM (mph)    NW  6                     Lgt/Var
Wind 20ft PM (mph)    NW  5        NW  8        Lgt/Var
Precip Duration                    1
Precip Begin                       8 PM
Precip End                         6 AM
Precip Amount         0.00         0.01         0.00
Mixing Hgt(ft-agl)    2800         700          3300
Transport Wnd (mph)   W  7         W  7         SW  8
Dispersion Index      22           10           25
Max LVORI             4            5            4

Remarks...None.

$$

.FORECAST FOR DAYS 3 THROUGH 7...
.THURSDAY NIGHT...Mostly cloudy. Lows in the lower 80s. Southwest
winds around 5 mph.
.FRIDAY...Mostly sunny. Highs around 90. Southeast winds around
5 mph.
.FRIDAY NIGHT...Mostly clear. Lows in the lower 80s. South 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...Partly cloudy with a slight chance of showers.
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 with a slight chance of showers. Highs in the
lower 90s. Southeast 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 in the lower 90s. East winds around 5 mph.

$$