FNUS52 KKEY 310827 FWFKEY Fire Weather Planning Forecast for the Florida Keys National Weather Service Key West FL 427 AM EDT Fri Jul 31 2026 .Discussion... A reverse cloud line is possible again today under light and variable winds. Waterspout formation is possible with any cloud line that does try and develop along with a slight chance of showers and thunderstorms. Min RH values will be in the lower 60s percent today with decent RH recovery overnight to the mid 80s percent. Poor to fair dispersion indices also expected today. FLZ076>078-010100- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the cities of Key Largo, Marathon, and Key West 427 AM EDT Fri Jul 31 2026 Today Tonight Sat Cloud Cover Pcldy Pcldy Pcldy Chance Precip (%) 0 10 20 Chance of Thunder (%) 0 10 20 Weather Type None Tstms Tstms Max/Min Temp 92 81 91 Min/Max RH % 62 84 61 Wind 20ft AM (mph) Lgt/Var Lgt/Var Wind 20ft PM (mph) Lgt/Var Lgt/Var Lgt/Var Precip Duration 1 1 Precip Begin 8 PM Continuing Precip End Continuing Continuing Precip Amount 0.00 0.01 0.02 Mixing Hgt(ft-agl) 3000 1200 3300 Transport Wnd (mph) W 6 NW 5 S 5 Dispersion Index 13 4 14 Max LVORI 4 4 4 Remarks...None. $$ .FORECAST FOR DAYS 3 THROUGH 7... .SATURDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 80s. South winds around 5 mph. .SUNDAY...Mostly sunny with a chance of showers and a slight chance of thunderstorms. Highs around 90. Southeast winds around 5 mph. .SUNDAY NIGHT...Partly cloudy with a chance of showers and a slight chance of thunderstorms. Lows in the lower 80s. Southeast winds around 5 mph. .MONDAY...Mostly sunny with a chance of showers and a slight chance of thunderstorms. Highs around 90. Southeast winds around 5 mph. .MONDAY NIGHT...Partly cloudy with a slight chance of showers. Lows in the lower 80s. Southeast winds around 5 mph. .TUESDAY...Mostly sunny with a chance of showers and thunderstorms. Highs around 90. Southeast winds around 5 mph. .TUESDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 80s. East winds around 10 mph. .WEDNESDAY...Mostly sunny with a chance of showers and thunderstorms. Highs around 90. East winds around 10 mph. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 80s. East winds around 10 mph. .THURSDAY...Mostly sunny with a chance of showers and thunderstorms. Highs around 90. East winds around 10 mph. $$