Severe Weather and Heavy Rainfall from the High Plains to the Ohio Valley; Heat Continuing in the Central Plains and Southeast

A stationary front will be the focus for daily showers and thunderstorms capable of widely scattered flash flooding and severe weather from the High Plains to the Ohio Valley. Monsoonal thunderstorms could cause local flash flooding across the Southwest and the Great Basin. Dangerous heat continues across the Central Plains and Southeast. Many areas will see their hottest temperatures of the year. Read More >

Current conditions at

Salem, Salem-Leckrone Airport (KSLO)

Lat: 38.64°NLon: 88.96°WElev: 574ft.

89°F

32°C

Humidity 69%
Wind Speed NA
Barometer 29.86 in
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 12 Aug 3:55 pm CDT
Extended Forecast for

4 Miles SSE Greenville IL

Heat Advisory August 12, 04:03pm until August 15, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 12, 04:03pm until August 15, 09:00pm

    NOW until 9:00pm Sat

    Heat Advisory

  • This Afternoon

    High: 89 °F

    Isolated
    T-storms

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly after 4am.  Mostly cloudy, with a low around 75. Southeast wind 3 to 5 mph.  Chance of precipitation is 30%.

    Low: 75 °F

    Scattered
    T-storms

  • Thursday

    Thursday: Scattered showers and thunderstorms before noon, then isolated showers and thunderstorms after 3pm.  Partly sunny, with a high near 92. Heat index values as high as 105. Calm wind becoming southeast around 6 mph in the afternoon.  Chance of precipitation is 30%.

    High: 92 °F

    Scattered
    T-storms

  • Thursday Night

    Thursday Night: Isolated showers and thunderstorms before 3am.  Partly cloudy, with a low around 75. Southeast wind 5 to 7 mph.  Chance of precipitation is 20%.

    Low: 75 °F

    Isolated
    T-storms

  • Friday

    Friday: Mostly sunny, with a high near 94. South wind 3 to 5 mph.

    High: 94 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Isolated showers and thunderstorms. Cloudy, with a high near 89. South wind around 5 mph. Chance of precipitation is 20%.
Tonight
Scattered showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 75. Southeast wind 3 to 5 mph. Chance of precipitation is 30%.
Thursday
Scattered showers and thunderstorms before noon, then isolated showers and thunderstorms after 3pm. Partly sunny, with a high near 92. Heat index values as high as 105. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 30%.
Thursday Night
Isolated showers and thunderstorms before 3am. Partly cloudy, with a low around 75. Southeast wind 5 to 7 mph. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 94. South wind 3 to 5 mph.
Friday Night
Mostly clear, with a low around 75.
Saturday
Sunny, with a high near 95.
Saturday Night
Mostly clear, with a low around 75.
Sunday
Sunny, with a high near 95.
Sunday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 72.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 68.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 86.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 69.
Wednesday
Mostly sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Greenville IL
 38.84°N 89.37°W (Elev. 528 ft)
2:46 pm CDT Aug 12, 2026
4pm CDT Aug 12, 2026-6pm CDT Aug 19, 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