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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 Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

A Few Clouds

74°F

23°C

Humidity 91%
Wind Speed SE 9 mph
Barometer 29.87 in (1011.0 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 8 Jun 3:53 am CDT
Extended Forecast for

Arnold MO

Flood Watch June 8, 07:00am until June 9, 01:00am
Click here for hazard details and duration
Flood Watch

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly before 5am. Mostly cloudy, with a low around 71. South wind around 6 mph.

    Low: 71 °F

    Chance
    Showers

  • Monday

    Monday: Showers and thunderstorms, mainly before 3pm. High near 85. South wind 6 to 8 mph. Chance of precipitation is 80%.

    High: 85 °F

    Showers

  • Monday Night

    Monday Night: Showers and thunderstorms likely before 4am, then a chance of showers. Partly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.

    Low: 71 °F

    Showers
    Likely then
    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms between 10am and 11am. Mostly sunny, with a high near 92. Heat index values as high as 108. Southwest wind 3 to 7 mph. Chance of precipitation is 30%.

    High: 92 °F

    Chance
    Showers then
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 74. South wind 3 to 5 mph.

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75.

    Low: 75 °F

    Mostly Clear
    then Chance
    Showers

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 92.

    High: 92 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70. Chance of precipitation is 70%.

    Low: 70 °F

    Showers
    Likely

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly before 5am. Mostly cloudy, with a low around 71. South wind around 6 mph.
Monday
Showers and thunderstorms, mainly before 3pm. High near 85. South wind 6 to 8 mph. Chance of precipitation is 80%.
Monday Night
Showers and thunderstorms likely before 4am, then a chance of showers. Partly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Tuesday
A chance of showers and thunderstorms between 10am and 11am. Mostly sunny, with a high near 92. Heat index values as high as 108. Southwest wind 3 to 7 mph. Chance of precipitation is 30%.
Tuesday Night
Mostly clear, with a low around 74. South wind 3 to 5 mph.
Wednesday
Sunny, with a high near 95.
Wednesday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75.
Thursday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 92.
Thursday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70. Chance of precipitation is 70%.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 89.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly clear, with a low around 69.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
Saturday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Arnold MO
 38.42°N 90.38°W (Elev. 495 ft)
Last Update:
2:26 am CDT Jun 8, 2026
Forecast Valid:
4am CDT Jun 8, 2026-6pm CDT Jun 14, 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