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

Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

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

Lat: 34.98°NLon: 81.06°WElev: 669ft.

Fair

73°F

23°C

Humidity 94%
Wind Speed Calm
Barometer 29.96 in (1012.8 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 20 Aug 3:54 am EDT
Extended Forecast for

Delphia SC

  • Today

    Today: Sunny and hot, with a high near 95. Heat index values as high as 101. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 95 °F

    Hot

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 3am. Partly cloudy, with a low around 72. Calm wind.

    Low: 72 °F

    Slight Chance
    T-storms

  • Friday

    Friday: Showers and thunderstorms likely, mainly after 5pm. Mostly sunny, with a high near 92. Heat index values as high as 101. Calm wind becoming south southeast around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 92 °F

    Slight Chance
    Showers then
    T-storms
    Likely

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 2am. Low around 68. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 68 °F

    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Mostly sunny, with a high near 88. Calm wind.

    High: 88 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

Today
Sunny and hot, with a high near 95. Heat index values as high as 101. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
A 20 percent chance of showers and thunderstorms before 3am. Partly cloudy, with a low around 72. Calm wind.
Friday
Showers and thunderstorms likely, mainly after 5pm. Mostly sunny, with a high near 92. Heat index values as high as 101. Calm wind becoming south southeast around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 2am. Low around 68. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Mostly sunny, with a high near 88. Calm wind.
Saturday Night
Mostly clear, with a low around 68.
Sunday
Sunny, with a high near 89.
Sunday Night
Mostly clear, with a low around 67.
Monday
Sunny, with a high near 88.
Monday Night
Mostly clear, with a low around 67.
Tuesday
Sunny, with a high near 89.
Tuesday Night
Partly cloudy, with a low around 68.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Delphia SC
 34.95°N 81.23°W (Elev. 699 ft)
Last Update:
2:23 am EDT Aug 20, 2026
Forecast Valid:
4am EDT Aug 20, 2026-6pm EDT Aug 26, 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