MIAMI, FL — The National Weather Service in Miami has issued a forecast of scattered to numerous showers and thunderstorms across South Florida today, Thursday, September 04, 2025, with rain chances favoring areas south of Alligator Alley amid near-normal temperatures. A few storms may become strong to marginally severe this afternoon into evening, capable of producing gusty and erratic winds up to 35 mph, heavy downpours, and frequent lightning. Excessive rainfall could lead to isolated urban and poor drainage flooding, with reduced visibility. Temperatures will reach 86 to 90°F, with high humidity amplifying heat indices over 95°F, potentially approaching 103°F. [caption id="" align="alignnone" width="1024"] National Weather Service Miami South Florida Heat Indices[/caption] [caption id="" align="alignnone" width="1024"] National Weather Service Miami South Florida Precipitation Forecast[/caption] Rainfall chances today are moderate to high, with Palmdale at 73%, Clewiston at 73%, West Palm Beach at 76%, Immokalee at 77%, Naples at 79%, Everglades City at 77%, Fort Lauderdale at 80%, Miami at 78%, Homestead at 81%, and Flamingo at 85%, according to the NWS forecast. These probabilities show scattered to numerous shower and thunderstorm activity across South Florida, with potential for localized heavy rainfall. Storm Timing: Morning: Scattered thunderstorms starting around 10am Afternoon into evening: Increased coverage of showers and thunderstorms, most likely 2pm to 5pm Possible Hazards: Heavy downpours with poor visibility Localized urban flooding, especially in urban areas and roadways Gusty, erratic winds from strong storms up to 35 mph Frequent lightning strikes National Weather Service Miami South Florida Doppler Radar Miami Weather Forecast Today Showers and thunderstorms, mainly before 5pm. Some of the storms could produce heavy rainfall. High near 89. Heat index values as high as 101. West wind 5 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible. Tonight A 30 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 77. Calm wind. Friday A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 89. Heat index values as high as 101. Light west wind becoming 5 to 8 mph in the morning. Friday Night A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 77. Calm wind. Saturday A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Light and variable wind becoming southeast 5 to 7 mph in the morning. Saturday Night A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 77. Southeast wind around 6 mph becoming calm.