Tropical System in the Gulf; Dangerous Heat and Air Quality Concerns; Severe Thunderstorms for Midwest to mid-Atlantic

Tropical system in the Gulf expected to gradually strengthen the next couple of days off the Florida Panhandle and Alabama coasts. Instances of flash flooding will be possible through Thursday along the eastern and central Gulf Coast. Severe thunderstorms will develop and move along a cold front crossing the Upper Midwest, and through the Ohio Valley/Mid-Atlantic on Tuesday. Read More >

Current conditions at

Lancaster County-mc Whirter Field (KLKR)

Lat: 34.72°NLon: 80.86°WElev: 486ft.

Partly Cloudy

N/A

Humidity NA
Wind Speed S 10 mph
Barometer 29.93 in
Dewpoint N/A
Visibility 10.00 mi
Last update 20 Jul 2:55 pm EDT
Extended Forecast for

Great Falls SC

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 7pm and 11pm.  Partly cloudy, with a low around 74. South southwest wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 20%.

    Low: 74 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 95. Heat index values as high as 101. Light south southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 18 mph.

    High: 95 °F

    Hot

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 2am.  Increasing clouds, with a low around 75. South southwest wind around 7 mph.  Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 2pm.  Partly sunny, with a high near 92. Heat index values as high as 100. Southwest wind 8 to 11 mph, with gusts as high as 20 mph.  New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 92 °F

    Partly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 8pm.  Low around 70. Light and variable wind.  Chance of precipitation is 90%.

    Low: 70 °F

    T-storms then
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm.  High near 83. Chance of precipitation is 80%.

    High: 83 °F

    Showers
    Likely then
    T-storms

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers.  Low around 67. Chance of precipitation is 80%.

    Low: 67 °F

    T-storms then
    Showers
    Likely

  • Friday

    Friday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm.  Mostly cloudy, with a high near 83. Chance of precipitation is 60%.

    High: 83 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then showers likely after 2am.  Mostly cloudy, with a low around 68. Chance of precipitation is 60%.

    Low: 68 °F

    Showers
    Likely

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms between 7pm and 11pm. Partly cloudy, with a low around 74. South southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.
Tuesday
Mostly sunny and hot, with a high near 95. Heat index values as high as 101. Light south southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 18 mph.
Tuesday Night
A slight chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 2am. Increasing clouds, with a low around 75. South southwest wind around 7 mph. Chance of precipitation is 20%.
Wednesday
A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 92. Heat index values as high as 100. Southwest wind 8 to 11 mph, with gusts as high as 20 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 8pm. Low around 70. Light and variable wind. Chance of precipitation is 90%.
Thursday
Showers and possibly a thunderstorm. High near 83. Chance of precipitation is 80%.
Thursday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 67. Chance of precipitation is 80%.
Friday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then showers likely after 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Saturday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Sunday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 70.
Monday
Sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
Great Falls SC
 34.58°N 80.89°W (Elev. 397 ft)
2:23 pm EDT Jul 20, 2026
3pm EDT Jul 20, 2026-6pm EDT Jul 27, 2026
 
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Additional Resources

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