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Heat in the Central U.S.; Heavy Rain Possible for South Texas; Monitoring Erin Tropical Impacts

Hot temperatures are forecast over the Plains and into the lower Mississippi River Valley Friday where Heat Advisories have been issued. Heavy rain from a disturbance in the western Gulf could bring flooding to south Texas. Erin could bring tropical storm conditions and heavy rain to Puerto Rico and the USVI this weekend with dangerous surf and rip currents impacting the western Atlantic Basin. Read More >

Hazardous Weather Conditions

Current conditions at

Lancaster County-mc Whirter Field (KLKR)

Lat: 34.72°NLon: 80.86°WElev: 486ft.

Fog/Mist

73°F

23°C

Humidity 100%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 73°F (23°C)
Visibility 2.00 mi
Last update 15 Aug 5:35 am EDT
Extended Forecast for

Great Falls SC

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 91. Heat index values as high as 100. Light north northeast wind.

    High: 91 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 72. Calm wind. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Calm wind becoming northeast around 6 mph in the afternoon. Chance of precipitation is 30%.

    High: 90 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 91. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 91 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 91. Heat index values as high as 100. Light north northeast wind.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 72. Calm wind. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Calm wind becoming northeast around 6 mph in the afternoon. Chance of precipitation is 30%.
Saturday Night
A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 70. Calm wind.
Sunday
Sunny, with a high near 91. Calm wind becoming north northeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 71.
Monday
Sunny, with a high near 92.
Monday Night
Partly cloudy, with a low around 72.
Tuesday
Mostly sunny, with a high near 88.
Tuesday Night
Mostly clear, with a low around 70.
Wednesday
Sunny, with a high near 89.
Wednesday Night
Partly cloudy, with a low around 70.
Thursday
Partly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Great Falls SC
 34.58°N 80.89°W (Elev. 397 ft)
Last Update:
1:28 am EDT Aug 15, 2025
Forecast Valid:
5am EDT Aug 15, 2025-6pm EDT Aug 21, 2025
 
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