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.

Fair

90°F

32°C

Humidity 59%
Wind Speed S 6 mph
Barometer 30.09 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 18 Aug 11:45 am CDT
Extended Forecast for

3 Miles W Buncombe IL

Heat Advisory August 18, 11:51am until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 18, 11:51am until August 19, 07:00pm

    NOW until 7:00pm Tue

    Heat Advisory

  • Today

    High: 98 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 97. Heat index values as high as 106. Calm wind.

    High: 97 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74. Calm wind.

    Low: 74 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming north around 6 mph in the afternoon.

    High: 91 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 69. North northeast wind around 6 mph becoming calm in the evening.

    Low: 69 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 90. North northeast wind 5 to 7 mph.

    High: 90 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 67. North northeast wind around 6 mph becoming calm in the evening.

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Today
Sunny and hot, with a high near 98. Heat index values as high as 106. Southeast wind around 5 mph becoming calm in the afternoon.
Tonight
Mostly clear, with a low around 74. Calm wind.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 97. Heat index values as high as 106. Calm wind.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74. Calm wind.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming north around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 69. North northeast wind around 6 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 90. North northeast wind 5 to 7 mph.
Thursday Night
Mostly clear, with a low around 67. North northeast wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 91. Light north northeast wind.
Friday Night
Mostly clear, with a low around 68. Calm wind.
Saturday
Sunny, with a high near 91. Calm wind becoming north northwest around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 66. Light north wind.
Sunday
Sunny, with a high near 86. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Buncombe IL
 37.47°N 89.02°W
Last Update:
11:31 am CDT Aug 18, 2025
Forecast Valid:
11am CDT Aug 18, 2025-6pm CDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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