Severe Thunderstorms in the Ohio Valley and Mid-Atlantic; Heat Continuing in the Central U.S.

Widespread strong to severe thunderstorms are expected from the Upper Ohio Valley into the Mid-Atlantic through Friday, with damaging winds as the primary threat. Dangerous heat will continue from the South-Central U.S. to the Midwest, Ohio/Tennessee valleys, and Mid-Atlantic. Widespread Major to Extreme Heat Risk is forecast into the weekend and will confine to the South-Central U.S. by Labor Day Read More >

Current conditions at

Greenville Spartanburg International Airport (KGSP)

Lat: 34.91°NLon: 82.21°WElev: 955ft.

Fair

75°F

24°C

Humidity 88%
Wind Speed Calm
Barometer 30.04 in (1015.8 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 4 Sep 2:53 am EDT
Extended Forecast for

Duncan SC

  • Overnight

    Overnight: Clear, with a low around 73. Calm wind.

    Low: 73 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 95. Heat index values as high as 102. Light and variable wind.

    High: 95 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 74. Light south southwest wind.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 3pm.  Increasing clouds and hot, with a high near 97. Heat index values as high as 103. Calm wind.  New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 97 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms, mainly between 8pm and 10pm.  Partly cloudy, with a low around 71. Light north northwest wind.

    Low: 71 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 92.

    High: 92 °F

    Sunny then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely before 1am, then a chance of showers between 1am and 2am.  Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely

  • Labor Day

    Labor Day: Partly sunny, with a high near 83.

    High: 83 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 73. Calm wind.
Friday
Sunny and hot, with a high near 95. Heat index values as high as 102. Light and variable wind.
Friday Night
Mostly clear, with a low around 74. Light south southwest wind.
Saturday
A 30 percent chance of showers and thunderstorms after 3pm. Increasing clouds and hot, with a high near 97. Heat index values as high as 103. Calm wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A 20 percent chance of showers and thunderstorms, mainly between 8pm and 10pm. Partly cloudy, with a low around 71. Light north northwest wind.
Sunday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92.
Sunday Night
Showers and thunderstorms likely before 1am, then a chance of showers between 1am and 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Labor Day
Partly sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 65.
Tuesday
Mostly sunny, with a high near 87.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
Mostly sunny, with a high near 90.
Wednesday Night
Mostly clear, with a low around 69.
Thursday
Sunny, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
Duncan SC
 34.93°N 82.14°W (Elev. 781 ft)
2:23 am EDT Sep 4, 2026
3am EDT Sep 4, 2026-6pm EDT Sep 10, 2026
 
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Additional Resources

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