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

Heat Across The Southern U.S.; Storms And Heavy Rain in Central U.S.

The early-season heat across portions of the Southern U.S. will continue for much of this week with more potential record high temperatures. On Tuesday, expect 90s and triple digits from the southern Plains into parts of the Lower Mississippi Valley. Also on Tuesday, strong to severe thunderstorms and locally heavy rainfall will be possible from the central Plains into the Mid Mississippi Valley. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

26°C

79°F

Humidity 42%
Wind Speed Vrbl 6 km/h
Barometer 1016.8 mb (30.06 in)
Dewpoint 12°C (54°F)
Visibility 16 km
Heat Index26°C (79°F)
Last update 17 May 9:51 am CDT
Extended Forecast for

Lambert-St. Louis International Airport MO

  • Today

    Today: Mostly sunny, with a high near 29. South wind 10 to 14 km/h.

    Mostly Sunny

    High: 29 °C

  • Tonight

    Tonight: Showers and thunderstorms, mainly after 4am. Some of the storms could produce heavy rainfall. Low around 18. South wind 10 to 14 km/h. Chance of precipitation is 80%.

    Slight Chance
    T-storms then
    Heavy Rain

    Low: 18 °C

  • Wednesday

    Wednesday: Showers and thunderstorms, mainly before 10am. Some of the storms could produce heavy rainfall. High near 29. South wind 14 to 18 km/h becoming west in the afternoon. Winds could gust as high as 32 km/h. Chance of precipitation is 80%.

    Heavy Rain
    then Chance
    T-storms

    High: 29 °C

  • Wednesday
    Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 17. Northwest wind 8 to 13 km/h becoming light after midnight.

    Slight Chance
    T-storms

    Low: 17 °C

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 31. Light southeast wind becoming south 8 to 13 km/h in the morning.

    Mostly Sunny
    then Slight
    Chance
    T-storms

    High: 31 °C

  • Thursday
    Night

    Thursday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 23.

    Slight Chance
    T-storms

    Low: 23 °C

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 32.

    Chance
    T-storms

    High: 32 °C

  • Friday
    Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 16. Chance of precipitation is 60%.

    Showers
    Likely

    Low: 16 °C

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Partly sunny, with a high near 20. Chance of precipitation is 60%.

    Showers
    Likely

    High: 20 °C

Detailed Forecast

Today
Mostly sunny, with a high near 29. South wind 10 to 14 km/h.
Tonight
Showers and thunderstorms, mainly after 4am. Some of the storms could produce heavy rainfall. Low around 18. South wind 10 to 14 km/h. Chance of precipitation is 80%.
Wednesday
Showers and thunderstorms, mainly before 10am. Some of the storms could produce heavy rainfall. High near 29. South wind 14 to 18 km/h becoming west in the afternoon. Winds could gust as high as 32 km/h. Chance of precipitation is 80%.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 17. Northwest wind 8 to 13 km/h becoming light after midnight.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 31. Light southeast wind becoming south 8 to 13 km/h in the morning.
Thursday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 23.
Friday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 32.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 16. Chance of precipitation is 60%.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Partly sunny, with a high near 20. Chance of precipitation is 60%.
Saturday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 9.
Sunday
Sunny, with a high near 21.
Sunday Night
Partly cloudy, with a low around 11.
Monday
A 20 percent chance of showers. Partly sunny, with a high near 22.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Lambert-St. Louis International Airport MO
 38.76°N 90.37°W (Elev. 168 m)
Last Update:
9:42 am CDT May 17, 2022
Forecast Valid:
10am CDT May 17, 2022-6pm CDT May 23, 2022
 
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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