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Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Partly Cloudy

81°F

27°C

Humidity 74%
Wind Speed S 12 mph
Barometer 29.87 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 21 Jun 10:45 am CDT
Extended Forecast for

3 Miles WNW Whiteash IL

Lake Wind Advisory June 21, 12:00pm until June 21, 07:00pm
Click here for hazard details and duration
Lake Wind Advisory

  • Today

    Today: A 40 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 89. South wind 9 to 16 mph, with gusts as high as 25 mph.

    High: 89 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 4am, then a chance of showers and thunderstorms after 4am. Some of the storms could produce heavy rainfall. Low around 70. South southwest wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.

    Low: 70 °F

    Heavy Rain

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms, mainly before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 80. Northwest wind 8 to 10 mph.

    High: 80 °F

    Chance
    T-storms then
    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62. North wind 5 to 9 mph becoming calm in the evening.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 84. Light northeast wind.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. Light north wind.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Light south wind.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms, then a chance of showers after 1am. Mostly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Calm wind becoming west southwest around 5 mph.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 89. South wind 9 to 16 mph, with gusts as high as 25 mph.
Tonight
Showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 4am, then a chance of showers and thunderstorms after 4am. Some of the storms could produce heavy rainfall. Low around 70. South southwest wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.
Monday
A 30 percent chance of showers and thunderstorms, mainly before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 80. Northwest wind 8 to 10 mph.
Monday Night
Partly cloudy, with a low around 62. North wind 5 to 9 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 84. Light northeast wind.
Tuesday Night
Mostly clear, with a low around 64. Light north wind.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Light south wind.
Wednesday Night
A slight chance of showers and thunderstorms, then a chance of showers after 1am. Mostly cloudy, with a low around 67. Calm wind.
Thursday
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Calm wind becoming west southwest around 5 mph.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 66. Light and variable wind.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. Calm wind becoming south southwest around 5 mph in the afternoon.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Light south wind.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Southwest wind 5 to 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Whiteash IL
 37.8°N 88.97°W
Last Update:
11:01 am CDT Jun 21, 2026
Forecast Valid:
11am CDT Jun 21, 2026-6pm CDT Jun 27, 2026
 
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