Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Sparta Community-Hunter Field Airport (KSAR)

Lat: 38.15°NLon: 89.7°WElev: 528ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Marissa IL

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 82. South wind 3 to 5 mph.

    High: 82 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly before 1am.  Patchy fog after 1am.  Otherwise, mostly cloudy, with a low around 69. Calm wind.

    Low: 69 °F

    Chance
    T-storms and
    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 9am.  Otherwise, partly sunny, with a high near 84. Light northeast wind.

    High: 84 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 86. Calm wind.

    High: 86 °F

    Sunny

  • Friday Night

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

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82. South wind 3 to 5 mph.
Tonight
A 40 percent chance of showers and thunderstorms, mainly before 1am. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 69. Calm wind.
Thursday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 84. Light northeast wind.
Thursday Night
Partly cloudy, with a low around 66. Calm wind.
Friday
Sunny, with a high near 86. Calm wind.
Friday Night
Mostly clear, with a low around 66.
Saturday
Mostly sunny, with a high near 85.
Saturday Night
Mostly clear, with a low around 64.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 63.
Monday
Partly sunny, with a high near 84.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 66.
Tuesday
Mostly sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
Marissa IL
 38.25°N 89.77°W (Elev. 440 ft)
1:26 pm CDT Aug 19, 2026
1pm CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
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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