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

Excessive Rainfall and Tropical Storm in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce considerable, potentially life-threatening, flooding across the lower Mississippi River Valley and central Great Lakes region through tonight. Tropical Storm Arthur will move northeastward along the Texas coast today and then move inland over southwestern Louisiana by tonight. An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana. Read More >

Current conditions at

Rock Hill, Rock Hill - York County Airport (KUZA)

Lat: 34.98°NLon: 81.06°WElev: 669ft.

Fair

85°F

29°C

Humidity 45%
Wind Speed SW 10 G 16 mph
Barometer 29.86 in (1009.9 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 17 Jun 1:54 pm EDT
Extended Forecast for

Lancaster SC

  • This Afternoon

    This Afternoon: Sunny, with a high near 88. Southwest wind around 7 mph.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 72. Southwest wind 6 to 10 mph.

    Low: 72 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 90. Southwest wind 14 to 18 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 90 °F

    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then showers likely after 5am. Low around 70. Southwest wind 7 to 11 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 70 °F

    Showers

  • Juneteenth

    Juneteenth: Showers likely before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 89. West wind around 9 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 89 °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. Mostly cloudy, with a low around 66. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Showers
    Likely

  • Saturday

    Saturday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 88. Southwest wind around 7 mph.
Tonight
Increasing clouds, with a low around 72. Southwest wind 6 to 10 mph.
Thursday
A chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 90. Southwest wind 14 to 18 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then showers likely after 5am. Low around 70. Southwest wind 7 to 11 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Juneteenth
Showers likely before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 89. West wind around 9 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Mostly sunny, with a high near 89.
Saturday Night
Mostly clear, with a low around 66.
Sunday
Sunny, with a high near 92.
Sunday Night
Partly cloudy, with a low around 70.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 40%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. Chance of precipitation is 30%.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Lancaster SC
 34.72°N 80.77°W (Elev. 528 ft)
Last Update:
2:21 am EDT Jun 17, 2026
Forecast Valid:
2pm EDT Jun 17, 2026-6pm EDT Jun 23, 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