Risks of Severe Thunderstorms and Excessive Rainfall in the Central U.S.; Fire Weather Concerns in Alaska and Southwest

An expansive storm system will bring widespread storms with a threat for flash flooding and severe weather to much of the central to eastern U.S. into early this week. Critical fire weather conditions are expected across interior Alaska this weekend. Elevated fire conditions also expected in the Southwest U.S.. Conditions will remain uncomfortably hot across the southern Plains and the Southeast. Read More >

Current conditions at

Summerville Airport (KDYB)

Lat: 33.06°NLon: 80.28°WElev: 56ft.

Fair

73°F

23°C

Humidity 89%
Wind Speed Calm
Barometer 29.96 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 20 Jun 10:55 pm EDT
Extended Forecast for

5 Miles SSW Summerville SC

  • Tonight

    Tonight: Mostly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 3pm.  Mostly sunny, with a high near 92. Calm wind becoming south around 6 mph in the afternoon.

    High: 92 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 74. South wind around 6 mph becoming calm  in the evening.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 92. Heat index values as high as 101. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 92 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 75. Southwest wind 6 to 8 mph.

    Low: 75 °F

    Chance
    T-storms then
    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 95.

    High: 95 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm.  Partly cloudy, with a low around 74.

    Low: 74 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 94.

    High: 94 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms before 2am.  Mostly cloudy, with a low around 74.

    Low: 74 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Mostly cloudy, with a low around 71. Calm wind.
Sunday
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 92. Calm wind becoming south around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 74. South wind around 6 mph becoming calm in the evening.
Monday
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Heat index values as high as 101. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Monday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 75. Southwest wind 6 to 8 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 74.
Wednesday
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94.
Wednesday Night
A 40 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 74.
Thursday
A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 92.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Summerville SC
 32.95°N 80.23°W (Elev. 30 ft)
8:30 pm EDT Jun 20, 2026
11pm EDT Jun 20, 2026-6pm EDT Jun 27, 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