FNUS52 KKEY 180822
FWFKEY

Fire Weather Planning Forecast for the Florida Keys
National Weather Service Key West FL
422 AM EDT Sat Apr 18 2026

...DISPERSION VALUES BELOW 20 EXPECTED SUNDAY AFTERNOON...

.Discussion...
Dry air will remain entrenched across the Florida Keys today,
keeping rain chances less than 10 percent. A gradual increase in
moisture tonight will lead to slight chances for showers but the
likelihood of a wetting rain (0.25" or greater) remains incredibly
low. High pressure will be sliding east on Sunday, leaving the
island chain in a nebulous pressure regime. This will allow for
winds to become light and variable with afternoon dispersion
indices below 20. Afternoon RH values will hold well above 50
percent and recover to near 90 percent overnight.


FLZ076>078-190030-
Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys-
Including the cities of Key Largo, Marathon, and Key West
422 AM EDT Sat Apr 18 2026

                      Today        Tonight      Sun

Cloud Cover           Pcldy        Pcldy        Pcldy
Chance Precip (%)     0            10           0
Chance of Thunder (%) 0            0            0
Weather Type          None         Showers      None
Max/Min Temp          83           74           83
Min/Max RH %          69           94           69
Wind 20ft AM (mph)    E  8                      Lgt/Var
Wind 20ft PM (mph)    E  7         E  7         Lgt/Var
Precip Duration                    1
Precip Begin                       8 PM
Precip End                         6 AM
Precip Amount         0.00         0.00         0.00
Mixing Hgt(ft-agl)    2500         1200         2500
Transport Wnd (mph)   E 13         E 13         E  6
Dispersion Index      32           12           16
Max LVORI             4            5            5

Remarks...None.

$$

.FORECAST FOR DAYS 3 THROUGH 7...
.SUNDAY NIGHT...Mostly cloudy with a slight chance of showers.
Lows in the mid 70s. North winds around 5 mph.
.MONDAY...Mostly sunny with a slight chance of showers. Highs in
the lower 80s. North winds 5 to 10 mph, becoming northeast to
east near 10 mph.
.MONDAY NIGHT...Mostly cloudy with a chance of showers and a
slight chance of thunderstorms. Lows in the lower 70s. Northeast
winds 15 to 20 mph, increasing to 20 to 25 mph.
.TUESDAY...Mostly sunny with a slight chance of showers. Highs in
the upper 70s. Northeast winds 20 to 25 mph.
.TUESDAY NIGHT...Partly cloudy. Lows in the lower 70s. Northeast
winds 20 to 25 mph, decreasing to around 20 mph.
.WEDNESDAY...Mostly sunny. Highs in the upper 70s. East winds
around 20 mph, decreasing to 15 to 20 mph.
.WEDNESDAY NIGHT...Mostly cloudy. Lows in the lower 70s. East
winds 15 to 20 mph.
.THURSDAY...Partly sunny with a slight chance of showers. Highs
in the upper 70s. East winds 15 to 20 mph.
.THURSDAY NIGHT...Partly cloudy with a slight chance of showers.
Lows in the lower 70s. East winds 15 to 20 mph.
.FRIDAY...Mostly sunny. Highs around 80. East winds around
15 mph, decreasing to 10 to 15 mph.

$$