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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.

Fair

82°F

28°C

Humidity 58%
Wind Speed S 16 G 29 mph
Barometer 29.90 in (1012.0 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 17 May 11:53 am CDT
Extended Forecast for

Waterloo IL

  • This Afternoon

    This Afternoon: Partly sunny, then gradually becoming sunny, with a high near 89. South wind 9 to 16 mph, with gusts as high as 28 mph.

    High: 89 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 71. South wind around 13 mph, with gusts as high as 22 mph.

    Low: 71 °F

    Increasing
    Clouds

  • Monday

    Monday: Showers and thunderstorms likely, mainly between 1pm and 2pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 86. South wind 13 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

    High: 86 °F

    Heavy Rain

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 9pm, then a chance of showers and thunderstorms after 4am. Mostly cloudy, then gradually becoming mostly clear, with a low around 70. South wind 13 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.

    Low: 70 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7am. High near 86. South wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.

    High: 86 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 58. Chance of precipitation is 80%.

    Low: 58 °F

    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers. Mostly cloudy, with a high near 70.

    High: 70 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 52.

    Low: 52 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Partly sunny, then gradually becoming sunny, with a high near 89. South wind 9 to 16 mph, with gusts as high as 28 mph.
Tonight
Increasing clouds, with a low around 71. South wind around 13 mph, with gusts as high as 22 mph.
Monday
Showers and thunderstorms likely, mainly between 1pm and 2pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 86. South wind 13 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Monday Night
A slight chance of showers and thunderstorms before 9pm, then a chance of showers and thunderstorms after 4am. Mostly cloudy, then gradually becoming mostly clear, with a low around 70. South wind 13 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7am. High near 86. South wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 58. Chance of precipitation is 80%.
Wednesday
A 20 percent chance of showers. Mostly cloudy, with a high near 70.
Wednesday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 52.
Thursday
Partly sunny, with a high near 72.
Thursday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 55.
Friday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 76.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 59.
Saturday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Waterloo IL
 38.35°N 90.16°W (Elev. 650 ft)
Last Update:
12:30 pm CDT May 17, 2026
Forecast Valid:
12pm CDT May 17, 2026-6pm CDT May 23, 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