Thunderstorms and Heavy Rains Across Portions of the Central and Eastern US; Heat Expands to Portions of the East

Widespread showers and thunderstorms, some severe, may produce heavy downpours and flash flooding across much of the eastern and central U.S. Dangerous heat will continue in the Pacific Northwest and expand across portions of the East. Deep tropical moisture and associated thunderstorms will bring heavy rainfall and localized flash flooding across portions of Florida into the central Gulf Coast. Read More >

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Mostly Cloudy

75°F

24°C

Humidity 96%
Wind Speed SE 3 mph
Barometer 29.93 in (1013.2 mb)
Dewpoint 74°F (23°C)
Visibility 8.00 mi
Last update 15 Jul 9:52 pm CDT
Extended Forecast for

3 Miles NE Jacob IL

  • Tonight

    Tonight: A 20 percent chance of showers before 1am.  Mostly cloudy, with a steady temperature around 75. Light south southwest wind.

    Low: 75 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 92. Heat index values as high as 106. Southwest wind 3 to 8 mph.

    High: 92 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 74. South southwest wind around 6 mph.

    Low: 74 °F

    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 92. West southwest wind 5 to 7 mph.

    High: 92 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 72. North northwest wind around 6 mph becoming calm  in the evening.

    Low: 72 °F

    Chance
    T-storms

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms, mainly after 1pm.  Partly sunny, with a high near 87. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 87 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms before 1am.  Mostly cloudy, with a low around 73. East southeast wind around 5 mph becoming calm  in the evening.

    Low: 73 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms, mainly after 1pm.  Mostly sunny, with a high near 89. South southwest wind 5 to 7 mph.

    High: 89 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 75. South wind around 6 mph.

    Low: 75 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
A 20 percent chance of showers before 1am. Mostly cloudy, with a steady temperature around 75. Light south southwest wind.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. Heat index values as high as 106. Southwest wind 3 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 74. South southwest wind around 6 mph.
Thursday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. West southwest wind 5 to 7 mph.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. North northwest wind around 6 mph becoming calm in the evening.
Friday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 87. Calm wind becoming east southeast around 5 mph in the afternoon.
Friday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 73. East southeast wind around 5 mph becoming calm in the evening.
Saturday
A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 89. South southwest wind 5 to 7 mph.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 75. South wind around 6 mph.
Sunday
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. South southwest wind 3 to 6 mph.
Sunday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 74. South wind around 6 mph becoming light and variable after midnight.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 92. South wind 3 to 7 mph.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 75. South wind around 6 mph.
Tuesday
A slight chance of showers and thunderstorms. Sunny, with a high near 94. South wind 5 to 8 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NE Jacob IL
 37.78°N 89.51°W
9:32 pm CDT Jul 15, 2025
10pm CDT Jul 15, 2025-6pm CDT Jul 22, 2025
 
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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