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

2 Miles SE Marissa IL

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly after 4am.  Clear early, then becoming mostly cloudy, with a low around 68. Light south wind.

    Low: 68 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms, mainly before 10am. Some of the storms could produce heavy rainfall.  High near 81. West wind around 5 mph becoming calm  in the afternoon.  Chance of precipitation is 90%.

    High: 81 °F

    Heavy Rain
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly before 1am.  Mostly cloudy, with a low around 67. Calm wind.  Chance of precipitation is 60%.

    Low: 67 °F

    T-storms
    Likely then
    Chance
    T-storms

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 82. Calm wind becoming north around 5 mph.

    High: 82 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers.  Mostly clear, with a low around 65.

    Low: 65 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers before 1pm.  Sunny, with a high near 85.

    High: 85 °F

    Slight Chance
    Showers

  • Saturday Night

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

    Low: 64 °F

    Mostly Clear

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly after 4am. Clear early, then becoming mostly cloudy, with a low around 68. Light south wind.
Wednesday
Showers and thunderstorms, mainly before 10am. Some of the storms could produce heavy rainfall. High near 81. West wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 90%.
Wednesday Night
Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 60%.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 82. Calm wind becoming north around 5 mph.
Thursday Night
Mostly clear, with a low around 64. Calm wind.
Friday
Sunny, with a high near 84.
Friday Night
A 20 percent chance of showers. Mostly clear, with a low around 65.
Saturday
A 20 percent chance of showers before 1pm. Sunny, with a high near 85.
Saturday Night
Mostly clear, with a low around 64.
Sunday
Mostly sunny, with a high near 82.
Sunday Night
A 30 percent chance of showers. Partly cloudy, with a low around 63.
Monday
A 20 percent chance of showers. Mostly sunny, with a high near 84.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 87.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SE Marissa IL
 38.23°N 89.74°W (Elev. 495 ft)
10:26 pm CDT Aug 18, 2026
12am 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