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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

Whiteash IL

Heat Advisory August 19, 02:41am until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 19, 02:41am 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 98. Heat index values as high as 106. Light and variable wind becoming west 5 to 7 mph in the morning.

    High: 98 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 72. West northwest wind around 5 mph becoming light and variable.

    Low: 72 °F

    Chance
    T-storms then
    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms between 7am and 10am. Partly sunny, with a high near 89. North wind 6 to 10 mph. Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 67. North northeast wind 6 to 9 mph.

    Low: 67 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 88. North northeast wind 6 to 10 mph.

    High: 88 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 90. North northeast wind 3 to 6 mph.

    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 98. Heat index values as high as 106. Light and variable wind becoming west 5 to 7 mph in the morning.
Tuesday Night
A 50 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 72. West northwest wind around 5 mph becoming light and variable.
Wednesday
A slight chance of showers and thunderstorms between 7am and 10am. Partly sunny, with a high near 89. North wind 6 to 10 mph. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 67. North northeast wind 6 to 9 mph.
Thursday
Mostly sunny, with a high near 88. North northeast wind 6 to 10 mph.
Thursday Night
Mostly clear, with a low around 66. Northeast wind 5 to 7 mph becoming calm in the evening.
Friday
Sunny, with a high near 90. North northeast wind 3 to 6 mph.
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 92. 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 10 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 81. Calm wind becoming north 5 to 7 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Whiteash IL
 37.78°N 88.92°W
Last Update:
1:45 am CDT Aug 19, 2025
Forecast Valid:
2am CDT Aug 19, 2025-6pm CDT Aug 25, 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