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NWS St. Louis Announces Changes To May 16, 2025 Tornado Damage Assessment

After a year-long review of new ground survey data and aerial imagery, NWS St. Louis made several adjustments to the May 16, 2025 tornado damage assessment. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Overcast

64°F

18°C

Humidity 78%
Wind Speed E 7 mph
Barometer 29.97 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 22 May 11:50 am CDT
Extended Forecast for

Glen Carbon IL

  • Today

    Today: Scattered showers, mainly after 4pm. Cloudy, with a high near 68. Northeast wind around 8 mph. Chance of precipitation is 30%.

    High: 68 °F

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers, mainly before 10pm. Cloudy, with a low around 60. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 60 °F

    Scattered
    Showers then
    Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 80. Calm wind becoming west around 5 mph.

    High: 80 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Scattered showers and thunderstorms between 10pm and 11pm, then scattered showers after 11pm. Increasing clouds, with a low around 64. Light south wind. Chance of precipitation is 50%.

    Low: 64 °F

    Scattered
    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 81. Light and variable wind. Chance of precipitation is 50%.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Cloudy

  • Memorial Day

    Memorial Day: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84.

    High: 84 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 64.

    Low: 64 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.

    High: 83 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Scattered showers, mainly after 4pm. Cloudy, with a high near 68. Northeast wind around 8 mph. Chance of precipitation is 30%.
Tonight
Scattered showers, mainly before 10pm. Cloudy, with a low around 60. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 80. Calm wind becoming west around 5 mph.
Saturday Night
Scattered showers and thunderstorms between 10pm and 11pm, then scattered showers after 11pm. Increasing clouds, with a low around 64. Light south wind. Chance of precipitation is 50%.
Sunday
A chance of showers, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 81. Light and variable wind. Chance of precipitation is 50%.
Sunday Night
Mostly cloudy, with a low around 62.
Memorial Day
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84.
Monday Night
Mostly cloudy, with a low around 64.
Tuesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Wednesday
Showers and thunderstorms likely. Partly sunny, with a high near 83. Chance of precipitation is 60%.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Glen Carbon IL
 38.77°N 89.97°W (Elev. 548 ft)
Last Update:
11:06 am CDT May 22, 2026
Forecast Valid:
11am CDT May 22, 2026-6pm CDT May 28, 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