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

Heavy Rainfall Along the Central Gulf Coast; Thunderstorms from the Plains to the Central Appalachians; Heat Across the East

A system in the Gulf could produce heavy rainfall and flash flooding for portions of the north-central Gulf Coast into Saturday. Widespread showers and thunderstorms are likely this afternoon into Friday from Central Plains into the mid-Mississippi Valley, Ohio Valley and Central Appalachians. Dangerous heat is expected from the Lower Mississippi Valley to the Mid-Atlantic today. Read More >

Hazardous Weather Conditions

Current conditions at

Greenville Downtown Airport (KGMU)

Lat: 34.85°NLon: 82.35°WElev: 1010ft.

Mostly Cloudy

91°F

33°C

Humidity 49%
Wind Speed SW 8 G 21 mph
Barometer 30.09 in (1017.5 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 17 Jul 4:53 pm EDT
Extended Forecast for

Sans Souci SC

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 93. Southwest wind around 9 mph.

    High: 93 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 74. Southwest wind around 6 mph becoming calm in the evening.

    Low: 74 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 95. Heat index values as high as 102. Light west southwest wind becoming southwest 5 to 10 mph in the morning.

    High: 95 °F

    Sunny then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 74. West southwest wind 3 to 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 74 °F

    Chance
    T-storms then
    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Sunny and hot, with a high near 96. West southwest wind 5 to 13 mph, with gusts as high as 20 mph.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 75.

    Low: 75 °F

    Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 4pm. Mostly sunny and hot, with a high near 96.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 74.

    Low: 74 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Monday

    Monday: Showers and thunderstorms likely, mainly after 5pm. Mostly sunny and hot, with a high near 96. Chance of precipitation is 60%.

    High: 96 °F

    Mostly Sunny
    then T-storms
    Likely

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 93. Southwest wind around 9 mph.
Tonight
Partly cloudy, with a low around 74. Southwest wind around 6 mph becoming calm in the evening.
Friday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 95. Heat index values as high as 102. Light west southwest wind becoming southwest 5 to 10 mph in the morning.
Friday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 74. West southwest wind 3 to 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Sunny and hot, with a high near 96. West southwest wind 5 to 13 mph, with gusts as high as 20 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 75.
Sunday
A 30 percent chance of showers and thunderstorms after 4pm. Mostly sunny and hot, with a high near 96.
Sunday Night
A 30 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 74.
Monday
Showers and thunderstorms likely, mainly after 5pm. Mostly sunny and hot, with a high near 96. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Chance of precipitation is 40%.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 90. Chance of precipitation is 60%.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Thursday
A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 95.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sans Souci SC
 34.88°N 82.43°W (Elev. 942 ft)
Last Update:
1:27 pm EDT Jul 17, 2025
Forecast Valid:
5pm EDT Jul 17, 2025-6pm EDT Jul 24, 2025
 
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