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

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

71°F

22°C

Humidity 31%
Wind Speed S 10 G 24 mph
Barometer 30.07 in (1018.1 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 29 Mar 3:53 pm CDT
Extended Forecast for

4 Miles SW Waterloo IL

Red Flag Warning until March 29, 07:00pm
Click here for hazard details and duration
Red Flag Warning
  •  
    Red Flag Warning until March 29, 07:00pm

    NOW until 7:00pm Sun

    Red Flag Warning

  • This Afternoon

    High: 70 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 57. South wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 57 °F

    Decreasing
    Clouds

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 81. Southwest wind 13 to 17 mph, with gusts as high as 29 mph.

    High: 81 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 64. South wind around 14 mph, with gusts as high as 26 mph.

    Low: 64 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after 1pm. Mostly sunny, with a high near 83. South wind 15 to 18 mph, with gusts as high as 30 mph.

    High: 83 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: A chance of rain, then rain likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 70%.

    Low: 58 °F

    Chance Rain
    then Rain
    Likely

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. High near 70. Chance of precipitation is 80%.

    High: 70 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 55. Chance of precipitation is 80%.

    Low: 55 °F

    Rain

Detailed Forecast

This Afternoon
Partly sunny, with a high near 70. South wind around 14 mph, with gusts as high as 22 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 57. South wind 8 to 10 mph, with gusts as high as 21 mph.
Monday
Partly sunny, then gradually becoming sunny, with a high near 81. Southwest wind 13 to 17 mph, with gusts as high as 29 mph.
Monday Night
Partly cloudy, with a low around 64. South wind around 14 mph, with gusts as high as 26 mph.
Tuesday
A 20 percent chance of rain after 1pm. Mostly sunny, with a high near 83. South wind 15 to 18 mph, with gusts as high as 30 mph.
Tuesday Night
A chance of rain, then rain likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 70%.
Wednesday
Rain and possibly a thunderstorm. High near 70. Chance of precipitation is 80%.
Wednesday Night
Rain and possibly a thunderstorm. Low around 55. Chance of precipitation is 80%.
Thursday
Rain. High near 67. Chance of precipitation is 80%.
Thursday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 50. Chance of precipitation is 60%.
Friday
A 40 percent chance of rain. Partly sunny, with a high near 73.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 57.
Saturday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.
Saturday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 48. Chance of precipitation is 60%.
Sunday
A 40 percent chance of rain. Partly sunny, with a high near 61.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Waterloo IL
 38.29°N 90.19°W (Elev. 633 ft)
Last Update:
2:56 pm CDT Mar 29, 2026
Forecast Valid:
4pm CDT Mar 29, 2026-6pm CDT Apr 5, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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