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Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

51°F

11°C

Humidity 54%
Wind Speed N 8 mph
Barometer 30.07 in (1018.3 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 1 May 7:53 am CDT
Extended Forecast for

Arnold MO

Flood Warning May 1, 08:11am until May 4, 10:00pm
Click here for hazard details and duration
Flood Warning
  •  
    Flood Warning May 1, 08:11am until May 4, 10:00pm

    NOW until 10:00pm Mon

    Flood Warning

  • Today

    High: 64 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: A slight chance of showers between 11pm and 4am. Partly cloudy, with a low around 43. Calm wind. Chance of precipitation is 20%.

    Low: 43 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 62. Calm wind becoming north 5 to 7 mph in the morning.

    High: 62 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41. Northwest wind around 5 mph becoming calm in the evening.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 76. Light southwest wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 20 mph.

    High: 76 °F

    Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 56. Chance of precipitation is 30%.

    Low: 56 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. Chance of precipitation is 30%.

    High: 82 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    T-storms

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, sunny, with a high near 64. North wind 3 to 6 mph.
Tonight
A slight chance of showers between 11pm and 4am. Partly cloudy, with a low around 43. Calm wind. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 62. Calm wind becoming north 5 to 7 mph in the morning.
Saturday Night
Mostly clear, with a low around 41. Northwest wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 76. Light southwest wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 20 mph.
Sunday Night
A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 56. Chance of precipitation is 30%.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. Chance of precipitation is 30%.
Monday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 56.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 70. Chance of precipitation is 70%.
Tuesday Night
A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 48. Chance of precipitation is 50%.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 65.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
Sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Arnold MO
 38.42°N 90.35°W (Elev. 400 ft)
Last Update:
5:46 am CDT May 1, 2026
Forecast Valid:
8am CDT May 1, 2026-6pm CDT May 7, 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