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

Severe Storms Expected Across Upper Midwest

Strong to severe thunderstorms with damaging winds, large hail, and heavy rain are expected across the Upper Mississippi Valley, which includes the Twin Cities metro area. Meanwhile, heavy rain and thunderstorms may produce flooding across the Mid Mississippi Valley and in the St. Louis metro region. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Mostly Cloudy

24°C

75°F

Humidity 79%
Wind Speed SW 6 km/h
Barometer 1017.3 mb (30.07 in)
Dewpoint 20°C (68°F)
Visibility 16 km
Last update 9 Aug 8:54 am CDT
Extended Forecast for

Chesterfield MO

Flood Warning until August 9, 10:30am
Click here for hazard details and duration
...
  •  
    Flood Warning until August 9, 10:30am

    NOW until
    10:30am Sun

    Flood Warning

  • Today

    Today: A chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 3pm. Some of the storms could produce heavy rain. Partly sunny, with a high near 33. Heat index values as high as 39. South wind 10 to 13 km/h. Chance of precipitation is 50%.

    Heavy Rain

    High: 33 °C

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 4am. Partly cloudy, with a low around 24. South wind 8 to 11 km/h.

    Partly Cloudy
    then Chance
    T-storms

    Low: 24 °C

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 35. Heat index values as high as 41. Southwest wind 8 to 13 km/h.

    Chance
    T-storms

    High: 35 °C

  • Monday
    Night

    Monday Night: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 22. Calm wind. Chance of precipitation is 60%.

    T-storms
    Likely

    Low: 22 °C

  • Tuesday

    Tuesday: Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 31. Calm wind. Chance of precipitation is 60%.

    T-storms
    Likely

    High: 31 °C

  • Tuesday
    Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22.

    Chance
    T-storms

    Low: 22 °C

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 30.

    Chance
    T-storms

    High: 30 °C

  • Wednesday
    Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 20.

    Slight Chance
    T-storms

    Low: 20 °C

Detailed Forecast

Today
A chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 3pm. Some of the storms could produce heavy rain. Partly sunny, with a high near 33. Heat index values as high as 39. South wind 10 to 13 km/h. Chance of precipitation is 50%.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 4am. Partly cloudy, with a low around 24. South wind 8 to 11 km/h.
Monday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 35. Heat index values as high as 41. Southwest wind 8 to 13 km/h.
Monday Night
Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 22. Calm wind. Chance of precipitation is 60%.
Tuesday
Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 31. Calm wind. Chance of precipitation is 60%.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 30.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 20.
Thursday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 31.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 20.
Friday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 31.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 21.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 30.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Chesterfield MO
 38.65°N 90.57°W (Elev. 156 m)
Last Update:
8:58 am CDT Aug 9, 2020
Forecast Valid:
9am CDT Aug 9, 2020-6pm CDT Aug 15, 2020
 
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