FNUS52 KKEY 210835
FWFKEY

Fire Weather Planning Forecast for the Florida Keys
National Weather Service Key West FL
435 AM EDT Thu May 21 2026

.Discussion...
Enhanced moisture across the Keys will maintain near normal rain
and thunder chances through Friday. That being said, the isolated
to 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 50s over the next
couple of days. Min RH values will be in the mid 60s percent today
and Friday with good RH recovery overnight to the mid 80s
percent.

FLZ076>078-220130-
Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys-
Including the cities of Key Largo, Marathon, and Key West
435 AM EDT Thu May 21 2026

                      Today        Tonight      Fri

Cloud Cover           Mclear       Mclear       Pcldy
Chance Precip (%)     30           20           30
Chance of Thunder (%) 20           20           20
Weather Type          Tstms        Tstms        Tstms
Max/Min Temp          88           80           89
Min/Max RH %          67           86           66
Wind 20ft AM (mph)    E  9                      E 10
Wind 20ft PM (mph)    E  9         E 11         E  9
Precip Duration       2            1            2
Precip Begin          6 AM         Continuing   Continuing
Precip End            Continuing   Continuing   Continuing
Precip Amount         0.00         0.00         0.00
Mixing Hgt(ft-agl)    3600         2400         3500
Transport Wnd (mph)   E 15         SE 20        E 16
Dispersion Index      55           29           56
Max LVORI             3            3            3

Remarks...None.

$$

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

$$

MJV