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Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

63°F

17°C

Humidity 30%
Wind Speed E 12 mph
Barometer 30.05 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 14 Mar 12:47 pm CDT
Extended Forecast for

3 Miles SW Simpson IL

Wind Advisory March 15, 10:00am until March 16, 07:00am
Click here for hazard details and duration
Wind Advisory

  • This Afternoon

    This Afternoon: Sunny, with a high near 69. South southeast wind around 8 mph.

    High: 69 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 55. South southeast wind 5 to 10 mph, with gusts as high as 23 mph.

    Low: 55 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 73. Breezy, with a south wind 14 to 23 mph, with gusts as high as 40 mph. Chance of precipitation is 50%.

    High: 73 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Rain showers before 1am, then a chance of rain and snow showers between 1am and 4am, then a chance of snow showers after 4am. Some thunder is also possible. Low around 27. South wind 15 to 18 mph becoming west northwest after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 100%.

    Low: 27 °F

    Showers then
    Rain/Snow

  • Monday

    Monday: Mostly cloudy, with a high near 34. West northwest wind around 16 mph, with gusts as high as 31 mph.

    High: 34 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 16. West northwest wind 6 to 11 mph, with gusts as high as 24 mph.

    Low: 16 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 38. West northwest wind 3 to 6 mph.

    High: 38 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 28. Calm wind becoming south 5 to 9 mph after midnight. Winds could gust as high as 20 mph.

    Low: 28 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 58. South wind 10 to 14 mph, with gusts as high as 26 mph.

    High: 58 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 69. South southeast wind around 8 mph.
Tonight
Increasing clouds, with a low around 55. South southeast wind 5 to 10 mph, with gusts as high as 23 mph.
Sunday
A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 73. Breezy, with a south wind 14 to 23 mph, with gusts as high as 40 mph. Chance of precipitation is 50%.
Sunday Night
Rain showers before 1am, then a chance of rain and snow showers between 1am and 4am, then a chance of snow showers after 4am. Some thunder is also possible. Low around 27. South wind 15 to 18 mph becoming west northwest after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 100%.
Monday
Mostly cloudy, with a high near 34. West northwest wind around 16 mph, with gusts as high as 31 mph.
Monday Night
Partly cloudy, with a low around 16. West northwest wind 6 to 11 mph, with gusts as high as 24 mph.
Tuesday
Sunny, with a high near 38. West northwest wind 3 to 6 mph.
Tuesday Night
Mostly cloudy, with a low around 28. Calm wind becoming south 5 to 9 mph after midnight. Winds could gust as high as 20 mph.
Wednesday
Mostly cloudy, with a high near 58. South wind 10 to 14 mph, with gusts as high as 26 mph.
Wednesday Night
Mostly clear, with a low around 41. South southwest wind 3 to 6 mph.
Thursday
Sunny, with a high near 70. Calm wind becoming south southwest around 5 mph in the morning.
Thursday Night
Partly cloudy, with a low around 47. Light south southwest wind.
Friday
Sunny, with a high near 72. Light and variable wind becoming west 5 to 8 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Simpson IL
 37.44°N 88.8°W
Last Update:
11:46 am CDT Mar 14, 2026
Forecast Valid:
1pm CDT Mar 14, 2026-6pm CDT Mar 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation