FNUS52 KKEY 190834
FWFKEY

Fire Weather Planning Forecast for the Florida Keys
National Weather Service Key West FL
434 AM EDT Tue May 19 2026

.Discussion...
Enhanced moisture across the Keys will maintain above normal rain
and thunder chances. That being said, the scattered nature of 
these showers will mean that rainfall amounts will be highly 
variable. Breezy conditions will continue through at least this 
evening before gradually slackening. This will keep daytime 
dispersion indices in the lower to upper 50s over the next couple 
of days. Min RH values will be in the upper 60s percent today and 
mid 60s percent for Wednesday with good RH recovery overnight to 
the mid 80s percent.

FLZ076>078-200145-
Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys-
Including the cities of Key Largo, Marathon, and Key West
434 AM EDT Tue May 19 2026

                      Today        Tonight      Wed          

Cloud Cover           Pcldy        Pcldy        Mclear       
Chance Precip (%)     40           40           30           
Chance of Thunder (%) 20           20           20           
Weather Type          Tstms        Tstms        Tstms        
Max/Min Temp          89           79           88           
Min/Max RH %          68           85           65           
Wind 20ft AM (mph)    E 11                      E  9         
Wind 20ft PM (mph)    E 11         E 11         E  9         
Precip Duration       2            2            2            
Precip Begin          6 AM         Continuing   Continuing   
Precip End            Continuing   Continuing   Continuing   
Precip Amount         0.20         0.09         0.02         
Mixing Hgt(ft-agl)    3600         2500         3700         
Transport Wnd (mph)   E 18         E 17         E 15         
Dispersion Index      58           29           52           
Max LVORI             4            4            4            

Remarks...None.

$$

.FORECAST FOR DAYS 3 THROUGH 7...
.WEDNESDAY NIGHT...Mostly clear with a chance of showers and a
slight chance of thunderstorms. Lows in the lower 80s. East winds
around 10 mph. 
.THURSDAY...Sunny with a slight chance of showers and
thunderstorms. Highs in the upper 80s. East winds around 5 mph. 
.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 5 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 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 chance of showers and a
slight chance of thunderstorms. Lows in the lower 80s. East winds
around 15 mph. 
.MONDAY...Mostly sunny with a slight chance of showers and
thunderstorms. Highs in the upper 80s. East winds around 15 mph. 

$$

MJV