FPUS52 KKEY 120759 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 359 AM EDT Thu Sep 12 2024 FLZ076>078-122000- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 359 AM EDT Thu Sep 12 2024 ...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 7 PM EDT THIS EVENING... .TODAY...Partly cloudy with a chance of showers and a slight chance of thunderstorms early this morning, then mostly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Southeast to south winds 5 to 10 mph, becoming light and variable in the afternoon. Chance of rain 30 percent. Heat index values up to 110. .TONIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower to mid 80s. Light and variable winds, becoming southeast near 5 mph. Chance of rain 20 percent. .FRIDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Southeast to south winds near 5 mph, becoming light and variable in the afternoon. Chance of rain 20 percent. Heat index values up to 110. .FRIDAY NIGHT...Partly cloudy with a chance of showers and a slight chance of thunderstorms. Lows in the lower 80s. Light and variable winds. Chance of rain 30 percent. .SATURDAY...Partly sunny with a chance of showers and a slight chance of thunderstorms. Highs in the lower 90s. Southwest to west winds near 5 mph, becoming west to northwest in the afternoon. Chance of rain 30 percent. Heat index values up to 109. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy with a chance of showers and a slight chance of thunderstorms. Lows in the lower 80s. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 110 on Sunday. .MONDAY THROUGH WEDNESDAY...Partly cloudy with a chance of showers and a slight chance of thunderstorms. Highs near 90. Lows in the lower 80s. Chance of rain 40 percent. $$