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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

N/A

Humidity NA
Wind Speed Calm
Barometer 30.02 in
Dewpoint N/A
Visibility 10.00 mi
Last update 19 Aug 2:35 am CDT
Extended Forecast for

3 Miles SSW Pittsburg IL

Heat Advisory August 19, 02:44am until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 19, 02:44am until August 19, 07:00pm

    NOW until 7:00pm Tue

    Heat Advisory

  • Overnight

    Low: 76 °F

    Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Increasing clouds and hot, with a high near 97. Heat index values as high as 105. Light and variable wind becoming southwest around 6 mph in the morning.

    High: 97 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 72. Calm wind becoming north around 5 mph after midnight.

    Low: 72 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms between 7am and 10am. Partly sunny, with a high near 88. North wind 6 to 10 mph. Chance of precipitation is 20%.

    High: 88 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 67. North northeast wind 5 to 8 mph.

    Low: 67 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 87. North northeast wind 6 to 10 mph.

    High: 87 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66. North northeast wind 5 to 7 mph becoming calm in the evening.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 90. Calm wind becoming north northeast around 6 mph in the morning.

    High: 90 °F

    Sunny

Detailed Forecast

Overnight
Clear, with a low around 76. Calm wind.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Increasing clouds and hot, with a high near 97. Heat index values as high as 105. Light and variable wind becoming southwest around 6 mph in the morning.
Tuesday Night
A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 72. Calm wind becoming north around 5 mph after midnight.
Wednesday
A slight chance of showers and thunderstorms between 7am and 10am. Partly sunny, with a high near 88. North wind 6 to 10 mph. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 67. North northeast wind 5 to 8 mph.
Thursday
Mostly sunny, with a high near 87. North northeast wind 6 to 10 mph.
Thursday Night
Mostly clear, with a low around 66. North northeast wind 5 to 7 mph becoming calm in the evening.
Friday
Sunny, with a high near 90. Calm wind becoming north northeast around 6 mph in the morning.
Friday Night
Clear, with a low around 66. North northeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 91. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 64. North wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 86. Light north northwest wind increasing to 5 to 9 mph in the morning.
Sunday Night
Mostly clear, with a low around 59. North wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 80. Calm wind becoming north northwest 5 to 7 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Pittsburg IL
 37.73°N 88.86°W
Last Update:
1:45 am CDT Aug 19, 2025
Forecast Valid:
2am CDT Aug 19, 2025-6pm CDT Aug 25, 2025
 
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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