Severe Weather Possible from the Central Plains to the Northeast; Building Heat in the West; Fire Weather Concerns for the Southwest

Severe thunderstorms will be possible from the central Plains to the Mid-Atlantic and Northeast on Monday. Hazardous heat will linger across the southern U.S. and build across the West through mid-week. Hot and dry conditions will fuel fire weather concerns for Interior Alaska and the Four Corners region through Monday. Read More >

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Mostly Cloudy

77°F

25°C

Humidity 89%
Wind Speed SW 7 mph
Barometer 29.79 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 21 Jun 11:35 pm CDT
Extended Forecast for

3 Miles W Vienna IL

  • Tonight

    Tonight: Showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers and thunderstorms after 4am.  Low around 70. Southwest wind around 7 mph.  Chance of precipitation is 90%.

    Low: 70 °F

    T-storms

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms, mainly before noon.  Mostly cloudy, with a high near 81. North northwest wind 6 to 8 mph.

    High: 81 °F

    Chance
    T-storms then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62. North wind around 6 mph becoming calm  in the evening.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 83. Light east northeast wind.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am.  Mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 85. Light and variable wind.

    High: 85 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 68. Calm wind.  Chance of precipitation is 20%.

    Low: 68 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms, mainly after 1pm.  Mostly sunny, with a high near 87. Light and variable wind.

    High: 87 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers and thunderstorms after 4am. Low around 70. Southwest wind around 7 mph. Chance of precipitation is 90%.
Monday
A 50 percent chance of showers and thunderstorms, mainly before noon. Mostly cloudy, with a high near 81. North northwest wind 6 to 8 mph.
Monday Night
Partly cloudy, with a low around 62. North wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 83. Light east northeast wind.
Tuesday Night
A 20 percent chance of showers after 1am. Mostly clear, with a low around 63. Calm wind.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Light and variable wind.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. Calm wind. Chance of precipitation is 20%.
Thursday
A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 87. Light and variable wind.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Calm wind.
Friday
A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 87. Calm wind becoming south around 5 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Calm wind.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Southwest wind 3 to 8 mph.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 74. South wind 5 to 7 mph.
Sunday
Mostly sunny, with a high near 91. South southwest wind 7 to 16 mph, with gusts as high as 26 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Vienna IL
 37.4°N 88.97°W
10:11 pm CDT Jun 21, 2026
11pm CDT Jun 21, 2026-6pm CDT Jun 28, 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