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

73°F

23°C

Humidity 75%
Wind Speed S 14 mph
Barometer 29.94 in
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 17 May 2:15 am CDT
Extended Forecast for

2 Miles ESE Frankfort Heights IL

Lake Wind Advisory May 17, 12:00pm until May 17, 05:00pm
Click here for hazard details and duration
Lake Wind Advisory

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 71. South wind around 7 mph.

    Low: 71 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 89. South wind 8 to 16 mph, with gusts as high as 24 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 71. South wind 10 to 13 mph, with gusts as high as 22 mph.

    Low: 71 °F

    Increasing
    Clouds

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 89. South wind 14 to 18 mph, with gusts as high as 26 mph.

    High: 89 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 72. South wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 72 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 88. South southwest wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.

    High: 88 °F

    Chance
    Showers then
    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 64. Southwest wind 5 to 9 mph becoming north northwest after midnight. Chance of precipitation is 90%.

    Low: 64 °F

    T-storms then
    Showers

  • Wednesday

    Wednesday: A slight chance of showers. Mostly cloudy, with a high near 74. North wind around 9 mph.

    High: 74 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers. Mostly cloudy, with a low around 55. Northeast wind 7 to 9 mph.

    Low: 55 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 71. South wind around 7 mph.
Sunday
Sunny, with a high near 89. South wind 8 to 16 mph, with gusts as high as 24 mph.
Sunday Night
Increasing clouds, with a low around 71. South wind 10 to 13 mph, with gusts as high as 22 mph.
Monday
A 50 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 89. South wind 14 to 18 mph, with gusts as high as 26 mph.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 72. South wind 11 to 14 mph, with gusts as high as 22 mph.
Tuesday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 88. South southwest wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 64. Southwest wind 5 to 9 mph becoming north northwest after midnight. Chance of precipitation is 90%.
Wednesday
A slight chance of showers. Mostly cloudy, with a high near 74. North wind around 9 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 55. Northeast wind 7 to 9 mph.
Thursday
A slight chance of showers. Partly sunny, with a high near 74. Northeast wind around 9 mph.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 58. East northeast wind 3 to 8 mph.
Friday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 78. East wind 5 to 7 mph.
Friday Night
A chance of showers. Mostly cloudy, with a low around 62. East northeast wind around 6 mph becoming calm in the evening.
Saturday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 82. Light and variable wind becoming south around 6 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Frankfort Heights IL
 37.89°N 88.83°W
Last Update:
1:26 am CDT May 17, 2026
Forecast Valid:
2am CDT May 17, 2026-6pm CDT May 23, 2026
 
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