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

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fog

45°F

7°C

Humidity 100%
Wind Speed SW 5 mph
Barometer 30.23 in
Dewpoint 45°F (7°C)
Visibility 0.25 mi
Wind Chill42°F (6°C)
Last update 23 Nov 7:45 am CST
Extended Forecast for

4 Miles SSE Tunnel Hill IL

Dense Fog Advisory November 23, 07:52am until November 23, 09:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory November 23, 07:52am until November 23, 09:00am

    NOW until 9:00am Sun

    Dense Fog Advisory

  • Today

    High: 52 °F

    Dense Fog
    then Partly
    Sunny

  • Tonight

    Tonight: Patchy fog between 8pm and 3am. Otherwise, partly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Patchy Fog

  • Monday

    Monday: Showers likely after noon. Mostly cloudy, with a high near 58. Calm wind becoming south southeast around 6 mph in the morning. Chance of precipitation is 60%.

    High: 58 °F

    Mostly Cloudy
    then Showers
    Likely

  • Monday Night

    Monday Night: Showers. Low around 51. South southeast wind around 6 mph. Chance of precipitation is 100%.

    Low: 51 °F

    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers before noon. Mostly cloudy, with a high near 63. West southwest wind 3 to 7 mph.

    High: 63 °F

    Chance
    Showers then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39. Calm wind becoming northwest 5 to 9 mph in the evening.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 48. West northwest wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 48 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 29. Light west northwest wind.

    Low: 29 °F

    Partly Cloudy

Detailed Forecast

Today
Widespread dense fog, mainly before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 52. Calm wind.
Tonight
Patchy fog between 8pm and 3am. Otherwise, partly cloudy, with a low around 43. Calm wind.
Monday
Showers likely after noon. Mostly cloudy, with a high near 58. Calm wind becoming south southeast around 6 mph in the morning. Chance of precipitation is 60%.
Monday Night
Showers. Low around 51. South southeast wind around 6 mph. Chance of precipitation is 100%.
Tuesday
A 30 percent chance of showers before noon. Mostly cloudy, with a high near 63. West southwest wind 3 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 39. Calm wind becoming northwest 5 to 9 mph in the evening.
Wednesday
Sunny, with a high near 48. West northwest wind 6 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 29. Light west northwest wind.
Thanksgiving Day
Sunny, with a high near 46. Northwest wind 3 to 6 mph.
Thursday Night
Partly cloudy, with a low around 27. Calm wind.
Friday
Mostly sunny, with a high near 46. Calm wind becoming south around 5 mph.
Friday Night
Mostly cloudy, with a low around 33. Calm wind becoming southeast around 5 mph after midnight.
Saturday
A chance of showers. Mostly cloudy, with a high near 49. South southeast wind 5 to 8 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Tunnel Hill IL
 37.51°N 88.85°W
Last Update:
7:26 am CST Nov 23, 2025
Forecast Valid:
7am CST Nov 23, 2025-6pm CST Nov 29, 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