Severe Weather and Heavy Rainfall in the Midwest and Desert Southwest; Mid-Summer Heat Continues

Severe thunderstorm and heavy rainfall are possible in the Midwest into the Central Appalachians and the Desert Southwest early this week. Storms are also expected in parts of the northern Plains today. Fire weather and air quality concerns will persist across portions of the West. Mid-summer heat will continue across much of the CONUS this week, especially in the the south-central High Plains. 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

Lenzburg IL

Extreme Heat Warning August 10, 06:44pm until August 12, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 10, 06:44pm until August 12, 08:00pm

    NOW until 8:00pm Wed

    Extreme Heat Warning

  • Tonight

    Low: 77 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny and hot, with a high near 98. Heat index values as high as 113. Southwest wind around 8 mph.

    High: 98 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 76. Southwest wind 5 to 7 mph becoming southeast after midnight.

    Low: 76 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 94. Heat index values as high as 109. Southwest wind 5 to 7 mph.

    High: 94 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 75. South wind around 6 mph.

    Low: 75 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms before 1pm.  Mostly sunny, with a high near 94.

    High: 94 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 1am.  Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 93.

    High: 93 °F

    Partly Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 77. Calm wind becoming south 5 to 9 mph in the evening.
Tuesday
Sunny and hot, with a high near 98. Heat index values as high as 113. Southwest wind around 8 mph.
Tuesday Night
Partly cloudy, with a low around 76. Southwest wind 5 to 7 mph becoming southeast after midnight.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 109. Southwest wind 5 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 75. South wind around 6 mph.
Thursday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 94.
Thursday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 74.
Friday
Partly sunny, with a high near 93.
Friday Night
Partly cloudy, with a low around 74.
Saturday
Mostly sunny, with a high near 96.
Saturday Night
Mostly clear, with a low around 75.
Sunday
Mostly sunny, with a high near 95.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Monday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Lenzburg IL
 38.27°N 89.82°W (Elev. 423 ft)
5:36 pm CDT Aug 10, 2026
6pm CDT Aug 10, 2026-6pm CDT Aug 17, 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