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

Thunderstorms, Heavy Rain and Heat in the Memorial Day Forecast

Strong to severe thunderstorms and heavy rain with possible flash flooding are expected from Texas to the Upper Mississippi Valley on Memorial Day. Also, a soaking rain with flooding is expected across south-central Florida. Meanwhile, a week of record breaking heat is going to get started across California into the Southwest and Great Basin, as excessive heat warnings stretch across the region. Read More >

Current conditions at

Charleston, Charleston Air Force Base (KCHS)

Lat: 32.9°NLon: 80.04°WElev: 46ft.

Fog/Mist

22°C

72°F

Humidity 94%
Wind Speed Calm
Barometer 1018.1 mb (30.07 in)
Dewpoint 21°C (70°F)
Visibility 10 km
Last update 24 May 11:56 pm EDT
Extended Forecast for

Johns Island SC

  • Overnight

    Overnight: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 22. Calm wind.

    Patchy Fog

    Low: 22 °C

  • Memorial
    Day

    Memorial Day: A 30 percent chance of showers and thunderstorms, mainly before noon. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 27. East wind 8 to 13 km/h increasing to 16 to 21 km/h in the afternoon. Winds could gust as high as 39 km/h.

    Chance
    T-storms and
    Patchy Fog

    High: 27 °C

  • Monday
    Night

    Monday Night: A 20 percent chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 21. East wind 13 to 16 km/h.

    Mostly Cloudy
    then Slight
    Chance
    T-storms

    Low: 21 °C

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Cloudy, with a high near 27. East wind 18 to 23 km/h. Chance of precipitation is 60%. New rainfall amounts between 5 and 7.5 mm possible.

    Showers
    Likely

    High: 27 °C

  • Tuesday
    Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 21. East wind 14 to 21 km/h. Chance of precipitation is 60%. New rainfall amounts between 2.5 and 5 mm possible.

    Showers
    Likely

    Low: 21 °C

  • Wednesday

    Wednesday: Showers and thunderstorms likely. Mostly cloudy, with a high near 28. Chance of precipitation is 60%. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.

    T-storms
    Likely

    High: 28 °C

  • Wednesday
    Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22.

    Chance
    Showers

    Low: 22 °C

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 29.

    Chance
    T-storms

    High: 29 °C

  • Thursday
    Night

    Thursday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 22.

    Chance
    T-storms

    Low: 22 °C

Detailed Forecast

Overnight
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 22. Calm wind.
Memorial Day
A 30 percent chance of showers and thunderstorms, mainly before noon. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 27. East wind 8 to 13 km/h increasing to 16 to 21 km/h in the afternoon. Winds could gust as high as 39 km/h.
Monday Night
A 20 percent chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 21. East wind 13 to 16 km/h.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Cloudy, with a high near 27. East wind 18 to 23 km/h. Chance of precipitation is 60%. New rainfall amounts between 5 and 7.5 mm possible.
Tuesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 21. East wind 14 to 21 km/h. Chance of precipitation is 60%. New rainfall amounts between 2.5 and 5 mm possible.
Wednesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 28. Chance of precipitation is 60%. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 29.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 22.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 29.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 22.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 29.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 28.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Johns Island SC
 32.73°N 80.07°W (Elev. 7 m)
Last Update:
8:53 pm EDT May 24, 2020
Forecast Valid:
12am EDT May 25, 2020-6pm EDT May 30, 2020
 
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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