National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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.

Overcast

75°F

24°C

Humidity 96%
Wind Speed Calm
Barometer 29.94 in (1013.4 mb)
Dewpoint 74°F (23°C)
Visibility 8.00 mi
Last update 16 Jul 1:52 am CDT
Extended Forecast for

Murphysboro IL

Heat Advisory July 16, 12:00pm until July 16, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Isolated showers and thunderstorms before 4am. Areas of fog after 3am. Otherwise, partly cloudy, with a low around 73. Light south southwest wind. Chance of precipitation is 20%.

    Low: 73 °F

    Isolated
    T-storms and
    Areas Fog

  • Wednesday

    Wednesday: Isolated showers, then scattered showers and thunderstorms after 10am. Areas of fog before 8am. Otherwise, mostly sunny, with a high near 92. Southwest wind 3 to 8 mph. Chance of precipitation is 30%.

    High: 92 °F

    Scattered
    T-storms and
    Areas Fog

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. South southwest wind 3 to 6 mph.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Scattered showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 107. West southwest wind 5 to 7 mph. Chance of precipitation is 40%.

    High: 94 °F

    Mostly Sunny
    then
    Scattered
    T-storms

  • Thursday Night

    Thursday Night: Scattered showers and thunderstorms. Mostly cloudy, with a low around 74. North northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 74 °F

    Scattered
    T-storms

  • Friday

    Friday: Scattered showers and thunderstorms. Partly sunny, with a high near 90. Calm wind becoming south around 5 mph. Chance of precipitation is 50%.

    High: 90 °F

    Scattered
    T-storms

  • Friday Night

    Friday Night: Isolated showers and thunderstorms. Partly cloudy, with a low around 75. Light south southeast wind. Chance of precipitation is 20%.

    Low: 75 °F

    Isolated
    T-storms

  • Saturday

    Saturday: Scattered showers and thunderstorms. Mostly sunny, with a high near 91. South southwest wind 3 to 7 mph.

    High: 91 °F

    Scattered
    T-storms

  • Saturday Night

    Saturday Night: Isolated showers and thunderstorms after 1am. Partly cloudy, with a low around 75. South southwest wind 3 to 6 mph.

    Low: 75 °F

    Partly Cloudy
    then Isolated
    T-storms

Detailed Forecast

Overnight
Isolated showers and thunderstorms before 4am. Areas of fog after 3am. Otherwise, partly cloudy, with a low around 73. Light south southwest wind. Chance of precipitation is 20%.
Wednesday
Isolated showers, then scattered showers and thunderstorms after 10am. Areas of fog before 8am. Otherwise, mostly sunny, with a high near 92. Southwest wind 3 to 8 mph. Chance of precipitation is 30%.
Wednesday Night
Mostly clear, with a low around 76. South southwest wind 3 to 6 mph.
Thursday
Scattered showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 107. West southwest wind 5 to 7 mph. Chance of precipitation is 40%.
Thursday Night
Scattered showers and thunderstorms. Mostly cloudy, with a low around 74. North northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Friday
Scattered showers and thunderstorms. Partly sunny, with a high near 90. Calm wind becoming south around 5 mph. Chance of precipitation is 50%.
Friday Night
Isolated showers and thunderstorms. Partly cloudy, with a low around 75. Light south southeast wind. Chance of precipitation is 20%.
Saturday
Scattered showers and thunderstorms. Mostly sunny, with a high near 91. South southwest wind 3 to 7 mph.
Saturday Night
Isolated showers and thunderstorms after 1am. Partly cloudy, with a low around 75. South southwest wind 3 to 6 mph.
Sunday
Scattered showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 92. South southwest wind 3 to 6 mph.
Sunday Night
Scattered showers and thunderstorms. Partly cloudy, with a low around 76. South wind around 6 mph.
Monday
Scattered showers and thunderstorms. Mostly sunny, with a high near 94. South southwest wind 5 to 8 mph.
Monday Night
Mostly clear, with a low around 77. South wind 5 to 7 mph.
Tuesday
Sunny, with a high near 95. South southwest wind 5 to 7 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Murphysboro IL
 37.77°N 89.34°W
Last Update:
2:01 am CDT Jul 16, 2025
Forecast Valid:
2am CDT Jul 16, 2025-6pm CDT Jul 22, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation