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.

Light Snow and Windy

35°F

2°C

Humidity 76%
Wind Speed NW 28 G 43 mph
Barometer 29.63 in (1003.2 mb)
Dewpoint 28°F (-2°C)
Visibility 9.00 mi
Wind Chill22°F (-6°C)
Last update 15 Mar 11:53 pm CDT
Extended Forecast for

4 Miles SW Waterloo IL

Wind Advisory March 16, 12:46am until March 16, 12:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory March 16, 12:46am until March 16, 12:00pm

    NOW until 12:00pm Mon

    Wind Advisory

  • Overnight

    Low: 22 °F

    Slight Chance
    Snow and
    Blustery

  • Monday

    Monday: A chance of flurries with a slight chance of snow before 9am, then a slight chance of snow between 9am and 11am. Cloudy, with a high near 30. Blustery, with a northwest wind 21 to 25 mph, with gusts as high as 36 mph. Chance of precipitation is 20%.

    High: 30 °F

    Blustery.
    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 15. Northwest wind 13 to 17 mph, with gusts as high as 26 mph.

    Low: 15 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 38. Northwest wind 5 to 9 mph becoming southwest in the afternoon.

    High: 38 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of snow before 1am, then a slight chance of rain. Mostly cloudy, with a low around 30. Southeast wind 5 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    Low: 30 °F

    Slight Chance
    Snow then
    Slight Chance
    Rain/Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

Detailed Forecast

Overnight
A chance of flurries with a slight chance of snow before 3am, then a chance of flurries between 3am and 5am. Cloudy, with a low around 22. Blustery, with a northwest wind 20 to 26 mph, with gusts as high as 37 mph. Chance of precipitation is 20%.
Monday
A chance of flurries with a slight chance of snow before 9am, then a slight chance of snow between 9am and 11am. Cloudy, with a high near 30. Blustery, with a northwest wind 21 to 25 mph, with gusts as high as 36 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 15. Northwest wind 13 to 17 mph, with gusts as high as 26 mph.
Tuesday
Sunny, with a high near 38. Northwest wind 5 to 9 mph becoming southwest in the afternoon.
Tuesday Night
A slight chance of snow before 1am, then a slight chance of rain. Mostly cloudy, with a low around 30. Southeast wind 5 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 62.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
Sunny, with a high near 71.
Thursday Night
Mostly clear, with a low around 44.
Friday
Mostly sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 51.
Saturday
Sunny, with a high near 76.
Saturday Night
Mostly clear, with a low around 47.
Sunday
Mostly sunny, with a high near 73.
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:
12:11 am CDT Mar 16, 2026
Forecast Valid:
12am CDT Mar 16, 2026-6pm CDT Mar 22, 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