FNUS52 KKEY 200844
FWFKEY

Fire Weather Planning Forecast for the Florida Keys
National Weather Service Key West FL
444 AM EDT Wed May 20 2026

.Discussion...
Enhanced moisture across the Keys will maintain near normal rain
and thunder chances today. Slightly drier air moves in for tonight
and Thursday leading to slight chances. That being said, the
scattered nature of these showers will mean that rainfall amounts
will be highly variable. Gentle to moderate easterly breezes are
expected through the next few days peaking in the evenings and
overnight and lulling during the afternoon. This will keep daytime
dispersion indices in the mid to upper 50s over the next couple
of days. Min RH values will be in the mid 60s percent today and
Thursday with good RH recovery overnight to the mid 80s percent.

FLZ076>078-210100-
Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys-
Including the cities of Key Largo, Marathon, and Key West
444 AM EDT Wed May 20 2026

                      Today        Tonight      Thu

Cloud Cover           Mclear       Mclear       Mclear
Chance Precip (%)     30           20           20
Chance of Thunder (%) 20           20           20
Weather Type          Tstms        Tstms        Tstms
Max/Min Temp          88           80           90
Min/Max RH %          65           84           64
Wind 20ft AM (mph)    E  9                      E  9
Wind 20ft PM (mph)    E  9         E 10         E  9
Precip Duration       2            1            1
Precip Begin          6 AM         Continuing   Continuing
Precip End            Continuing   Continuing   Continuing
Precip Amount         0.02         0.00         0.00
Mixing Hgt(ft-agl)    3700         2400         3700
Transport Wnd (mph)   E 17         E 22         E 16
Dispersion Index      56           25           58
Max LVORI             4            4            3

Remarks...None.

$$

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

$$

MJV