Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Current conditions at

Summerville Airport (KDYB)

Lat: 33.06°NLon: 80.28°WElev: 56ft.

Mostly Cloudy

79°F

26°C

Humidity 84%
Wind Speed W 7 mph
Barometer 29.88 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 17 Jun 10:15 am EDT
Extended Forecast for

7 Miles S Summerville Airport SC

  • Today

    Today: Showers and thunderstorms before 2pm, then a chance of showers between 2pm and 4pm, then a chance of showers and thunderstorms after 4pm.  High near 85. West wind around 10 mph.  Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms before 8pm.  Mostly cloudy, then gradually becoming mostly clear, with a low around 74. Southwest wind around 7 mph.

    Low: 74 °F

    Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 2pm.  Increasing clouds, with a high near 93. Heat index values as high as 102. Southwest wind 8 to 11 mph, with gusts as high as 22 mph.

    High: 93 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 2am, then showers and possibly a thunderstorm between 2am and 5am, then showers after 5am.  Low around 73. Southwest wind 7 to 9 mph.  Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 73 °F

    Showers

  • Juneteenth

    Juneteenth: Showers, with thunderstorms also possible after 8am.  High near 89. West wind 10 to 13 mph, with gusts as high as 23 mph.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 89 °F

    Showers then
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 72.

    Low: 72 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 91.

    High: 91 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

Detailed Forecast

Today
Showers and thunderstorms before 2pm, then a chance of showers between 2pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 85. West wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 74. Southwest wind around 7 mph.
Thursday
A 40 percent chance of showers and thunderstorms after 2pm. Increasing clouds, with a high near 93. Heat index values as high as 102. Southwest wind 8 to 11 mph, with gusts as high as 22 mph.
Thursday Night
Showers and thunderstorms likely before 2am, then showers and possibly a thunderstorm between 2am and 5am, then showers after 5am. Low around 73. Southwest wind 7 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Juneteenth
Showers, with thunderstorms also possible after 8am. High near 89. West wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Saturday
Partly sunny, with a high near 91.
Saturday Night
Partly cloudy, with a low around 70.
Sunday
Mostly sunny, with a high near 93.
Sunday Night
Partly cloudy, with a low around 73.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles S Summerville Airport SC
 32.96°N 80.28°W (Elev. 23 ft)
7:22 am EDT Jun 17, 2026
10am EDT Jun 17, 2026-6pm EDT Jun 23, 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