National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorms and Heavy Rain in the Mississippi Valley; Critical Fire Weather in the Southern Plains

Severe thunderstorms will persist tonight across the Middle Mississippi Valley, producing damaging winds, large to very large hail and several tornadoes. Low humidity and windy conditions will continue to produce elevated to critical fire weather conditions across the southern High Plains into midweek. Read More >

Current conditions at

Greenville Spartanburg International Airport (KGSP)

Lat: 34.91°NLon: 82.21°WElev: 955ft.

Fair

58°F

14°C

Humidity 70%
Wind Speed Calm
Barometer 30.19 in (1021.9 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 27 Apr 10:53 pm EDT
Extended Forecast for

Duncan SCSimilar City Names

  • Tonight

    Tonight: Mostly clear, with a low around 52. Light southeast wind.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of showers before 1pm, then a slight chance of showers after 2pm. Mostly cloudy, with a high near 73. Light south southwest wind becoming southwest 5 to 10 mph in the afternoon. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 73 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers, mainly after 2am. Increasing clouds, with a low around 57. Southwest wind around 6 mph becoming calm in the evening. New precipitation amounts between a quarter and half of an inch possible.

    Low: 57 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. High near 78. Southwest wind 6 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 78 °F

    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 55. West wind 6 to 8 mph becoming north northwest after midnight. Chance of precipitation is 30%.

    Low: 55 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers after 2pm. Partly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 50. Chance of precipitation is 60%.

    Low: 50 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 52. Light southeast wind.
Tuesday
A chance of showers before 1pm, then a slight chance of showers after 2pm. Mostly cloudy, with a high near 73. Light south southwest wind becoming southwest 5 to 10 mph in the afternoon. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
A 50 percent chance of showers, mainly after 2am. Increasing clouds, with a low around 57. Southwest wind around 6 mph becoming calm in the evening. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Showers and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. High near 78. Southwest wind 6 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 55. West wind 6 to 8 mph becoming north northwest after midnight. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 50.
Friday
A 30 percent chance of showers after 2pm. Partly sunny, with a high near 70.
Friday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 50. Chance of precipitation is 60%.
Saturday
Showers likely, mainly before 8am. Partly sunny, with a high near 66. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 42.
Sunday
Sunny, with a high near 71.
Sunday Night
Mostly clear, with a low around 46.
Monday
Sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Duncan SCSimilar City Names
 34.93°N 82.14°W (Elev. 781 ft)
Last Update:
7:34 pm EDT Apr 27, 2026
Forecast Valid:
11pm EDT Apr 27, 2026-6pm EDT May 4, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation