Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

85°F

29°C

Humidity 72%
Wind Speed SE 3 mph
Barometer 30.06 in (1017.9 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 17 Aug 8:53 pm EDT
Extended Forecast for

5 Miles WSW Long Key FL

  • Tonight

    Tonight: Mostly clear, with a low around 83. Calm wind.

    Low: 83 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. Calm wind becoming west around 5 mph in the afternoon.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 83. Northwest wind 5 to 10 mph.

    Low: 83 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms.  Sunny, with a high near 89. Northwest wind around 5 mph.  Chance of precipitation is 10%.

    High: 89 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 84. West wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 10%.

    Low: 84 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A slight chance of showers and thunderstorms.  Mostly sunny, with a high near 88. Chance of precipitation is 10%.

    High: 88 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers.  Partly cloudy, with a low around 83. Chance of precipitation is 10%.

    Low: 83 °F

    Slight Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: A slight chance of showers.  Mostly clear, with a low around 83. Chance of precipitation is 10%.

    Low: 83 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 83. Calm wind.
Tuesday
Sunny, with a high near 89. Calm wind becoming west around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 83. Northwest wind 5 to 10 mph.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 89. Northwest wind around 5 mph. Chance of precipitation is 10%.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 84. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 10%.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 10%.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 83. Chance of precipitation is 10%.
Friday
Sunny, with a high near 88.
Friday Night
A slight chance of showers. Mostly clear, with a low around 83. Chance of precipitation is 10%.
Saturday
Sunny, with a high near 88.
Saturday Night
A slight chance of showers. Mostly clear, with a low around 83. Chance of precipitation is 10%.
Sunday
Sunny, with a high near 88.
Sunday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 84. Chance of precipitation is 20%.
Monday
A slight chance of showers. Sunny, with a high near 88. Chance of precipitation is 10%.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Long Key FL
 24.79°N 80.89°W (Elev. 0 ft)
9:15 pm EDT Aug 17, 2026
9pm EDT Aug 17, 2026-6pm EDT Aug 24, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database