Extreme Heat in the Southwest; Severe Weather in the Northern Plains; Heavy Rain in the East

Extreme heat continues across the Southwest as temperatures may top 120 degrees. The heat may expand across the West and south-central U.S. into the middle of the month. Severe thunderstorms capable of severe wind gusts and large hail will be the primary hazards today across the northern Plains into the upper Midwest. Rainfall could be locally heavy across the Eastern U.S. today. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

67°F

19°C

Humidity 97%
Wind Speed Calm
Barometer 30.00 in (1015.3 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 4 Aug 3:53 am CDT
Extended Forecast for

4 Miles SW Waterloo IL

  • Today

    Today: Sunny, with a high near 86. Light south wind.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 66. Light southeast wind.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 89. Calm wind becoming south around 5 mph in the afternoon.

    High: 89 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 70. South wind 5 to 7 mph.

    Low: 70 °F

    Partly Cloudy
    then Chance
    T-storms

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 1pm.  Partly sunny, with a high near 86. South wind 3 to 5 mph.  Chance of precipitation is 70%.

    High: 86 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 1pm.  Partly sunny, with a high near 86.

    High: 86 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am.  Mostly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 1pm.  Mostly sunny, with a high near 88.

    High: 88 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 86. Light south wind.
Tonight
Mostly clear, with a low around 66. Light southeast wind.
Wednesday
Sunny, with a high near 89. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. South wind 5 to 7 mph.
Thursday
Showers likely and possibly a thunderstorm before 1pm. Partly sunny, with a high near 86. South wind 3 to 5 mph. Chance of precipitation is 70%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 86.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 69.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 71.
Sunday
Sunny, with a high near 90.
Sunday Night
Mostly clear, with a low around 72.
Monday
Sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Waterloo IL
 38.29°N 90.19°W (Elev. 633 ft)
4:31 am CDT Aug 4, 2026
4am CDT Aug 4, 2026-6pm CDT Aug 10, 2026
 
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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