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

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

Charleston Executive Airport (KJZI)

Lat: 32.7°NLon: 80°WElev: 16ft.

Fair

79°F

26°C

Humidity 94%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 77°F (25°C)
Visibility 9.00 mi
Heat Index83°F (28°C)
Last update 21 Jun 12:15 am EDT
Extended Forecast for

3 Miles E Johns Island SC

  • Overnight

    Overnight: Mostly cloudy, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 90. Calm wind becoming south 5 to 9 mph in the afternoon.

    High: 90 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 77. South wind 5 to 8 mph.

    Low: 77 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Heat index values as high as 103. Southwest wind 5 to 14 mph, with gusts as high as 21 mph.

    High: 90 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 78. Southwest wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94.

    High: 94 °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 77.

    Low: 77 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92.

    High: 92 °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 77.

    Low: 77 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Mostly cloudy, with a low around 74. Calm wind.
Sunday
Mostly sunny, with a high near 90. Calm wind becoming south 5 to 9 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 77. South wind 5 to 8 mph.
Monday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Heat index values as high as 103. Southwest wind 5 to 14 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 78. Southwest wind 9 to 11 mph, with gusts as high as 20 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 77.
Wednesday
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92.
Wednesday Night
A 40 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 77.
Thursday
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 77.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Johns Island SC
 32.73°N 80.01°W (Elev. 3 ft)
Last Update:
8:30 pm EDT Jun 20, 2026
Forecast Valid:
12am EDT Jun 21, 2026-6pm EDT Jun 27, 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