Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

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Last Map Update: Fri, Sep 18, 2026 at 9:04:52 am EDT

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National Weather Service Miami - South Florida

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Rain chances are on the rise across the Florida Keys this weekend (50–60%) due to a slow-moving upper-level low. With high moisture in place, localized flooding is possible in areas with repeated heavy downpours. ⛈️📡 Stay weather aware & track updates: weather.gov/KeyWest

TODAY...Partly to mostly cloudy. Chance of showers and thunderstorms. Highs in the upper 80s. East winds 5-10 mph. Chance of rain around 50 percent.

MARINE WINDS TODAY...Gentle NE-E breezes, decreasing to light to gentle. Bay/Gulfside 1-2 ft, SBSD to ~1 ft, Hawk Channel 1-2 ft, FL Straits ~2 ft, SBSD to 1-2 ft, SE Gulf 2-3 ft, SBSD to 1-2 ft. Bay/nearshore waters a smooth to light chop. Chance of showers and thunderstorms.

WAVE HEIGHTS TODAY...Gentle NE-E breezes, decreasing to light to gentle. Bay/Gulfside 1-2 ft, SBSD to ~1 ft, Hawk Channel 1-2 ft, FL Straits ~2 ft, SBSD to 1-2 ft, SE Gulf 2-3 ft, SBSD to 1-2 ft. Bay/nearshore waters a smooth to light chop. Chance of showers and thunderstorms.

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Dangerous Heat and Heavy Rainfall into the Weekend

NWS Key West