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

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Overcast

67°F

19°C

Humidity 91%
Wind Speed SE 5 mph
Barometer 29.83 in (1010.0 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 15 Apr 9:53 pm CDT
Extended Forecast for

Affton MO

Tornado Watch April 15, 10:02pm until April 16, 12:00am
Click here for hazard details and duration
Tornado Watch
  •  
    Tornado Watch April 15, 10:02pm until April 16, 12:00am

    NOW until 12:00am Thu

    Tornado Watch

  • Tonight

    Low: 63 °F

    Severe
    Thunderstorms

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 84. West wind around 7 mph.

    High: 84 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61. Light south wind.

    Low: 61 °F

    Mostly Clear

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. South wind 5 to 13 mph, with gusts as high as 24 mph.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 52. South wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.

    Low: 52 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms. Partly sunny, with a high near 64. Chance of precipitation is 50%.

    High: 64 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

Detailed Forecast

Tonight
Showers and thunderstorms, mainly before 3am. Some of the storms could be severe. Low around 63. Southwest wind 3 to 8 mph. Winds could gust as high as 20 mph. Chance of precipitation is 80%.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 84. West wind around 7 mph.
Thursday Night
Mostly clear, with a low around 61. Light south wind.
Friday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. South wind 5 to 13 mph, with gusts as high as 24 mph.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 52. South wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 64. Chance of precipitation is 50%.
Saturday Night
Mostly clear, with a low around 41.
Sunday
Sunny, with a high near 66.
Sunday Night
Clear, with a low around 43.
Monday
Sunny, with a high near 74.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Sunny, with a high near 78.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 56.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Affton MO
 38.56°N 90.32°W (Elev. 564 ft)
Last Update:
9:46 pm CDT Apr 15, 2026
Forecast Valid:
10pm CDT Apr 15, 2026-6pm CDT Apr 22, 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