National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

68°F

20°C

Humidity 82%
Wind Speed S 17 mph
Barometer 29.89 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 6 Mar 11:55 pm CST
Extended Forecast for

4 Miles SSW South Roxana IL

Severe T-storm Watch until March 7, 06:00am
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch until March 7, 06:00am

    NOW until 6:00am Sat

    Severe T-storm Watch

  • Overnight

    Low: 61 °F

    Severe
    Thunderstorms

  • Saturday

    Saturday: Showers, mainly before 8am. Temperature rising to near 66 by 10am, then falling to around 56 during the remainder of the day. Southwest wind 10 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%.

    High: 66 °F⇓

    Showers then
    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 38. Northwest wind 6 to 11 mph becoming light west after midnight.

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 66. Light southwest wind increasing to 6 to 11 mph in the morning.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 46. South wind around 7 mph.

    Low: 46 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Monday Night

    Monday Night: A slight chance of rain and thunderstorms, then a chance of rain after midnight. Mostly clear, with a low around 59. Chance of precipitation is 30%.

    Low: 59 °F

    Slight Chance
    T-storms then
    Chance Rain

  • Tuesday

    Tuesday: A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after noon. Partly sunny, with a high near 79. Chance of precipitation is 70%.

    High: 79 °F

    Rain Likely

Detailed Forecast

Overnight
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 2am. Some of the storms could be severe and produce heavy rainfall. Low around 61. South wind 8 to 16 mph becoming west. Winds could gust as high as 33 mph. Chance of precipitation is 100%.
Saturday
Showers, mainly before 8am. Temperature rising to near 66 by 10am, then falling to around 56 during the remainder of the day. Southwest wind 10 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%.
Saturday Night
Partly cloudy, with a low around 38. Northwest wind 6 to 11 mph becoming light west after midnight.
Sunday
Sunny, with a high near 66. Light southwest wind increasing to 6 to 11 mph in the morning.
Sunday Night
Clear, with a low around 46. South wind around 7 mph.
Monday
Sunny, with a high near 79.
Monday Night
A slight chance of rain and thunderstorms, then a chance of rain after midnight. Mostly clear, with a low around 59. Chance of precipitation is 30%.
Tuesday
A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after noon. Partly sunny, with a high near 79. Chance of precipitation is 70%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 51. Chance of precipitation is 90%.
Wednesday
Rain likely, mainly before noon. Cloudy, with a high near 60. Chance of precipitation is 70%.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 36.
Thursday
Sunny, with a high near 58.
Thursday Night
Partly cloudy, with a low around 41.
Friday
Mostly sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW South Roxana IL
 38.77°N 90.08°W (Elev. 427 ft)
Last Update:
10:41 pm CST Mar 6, 2026
Forecast Valid:
12am CST Mar 7, 2026-6pm CDT Mar 13, 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