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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

67°F

19°C

Humidity 93%
Wind Speed S 3 mph
Barometer 29.97 in (1014.4 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 19 May 3:53 am CDT
Extended Forecast for

Collinsville IL

Flood Watch May 19, 04:07am until May 19, 01:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch May 19, 04:07am until May 19, 01:00pm

    NOW until 1:00pm Tue

    Flood Watch

  • Overnight

    Low: 65 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 7am, then showers likely and possibly a thunderstorm between 7am and 8am, then a chance of showers and thunderstorms after 8am. Mostly cloudy, with a high near 77. South wind 8 to 14 mph becoming west in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 60%.

    High: 77 °F

    Showers
    Likely then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 4am, then a slight chance of showers. Cloudy, with a low around 58. North wind 8 to 10 mph. Chance of precipitation is 40%.

    Low: 58 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 70. North wind 8 to 10 mph.

    High: 70 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 53. Northeast wind around 8 mph.

    Low: 53 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 72.

    High: 72 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 50 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 59.

    Low: 59 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 73. Chance of precipitation is 80%.

    High: 73 °F

    Showers

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 65. South wind around 8 mph.
Tuesday
A chance of showers and thunderstorms before 7am, then showers likely and possibly a thunderstorm between 7am and 8am, then a chance of showers and thunderstorms after 8am. Mostly cloudy, with a high near 77. South wind 8 to 14 mph becoming west in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 60%.
Tuesday Night
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Cloudy, with a low around 58. North wind 8 to 10 mph. Chance of precipitation is 40%.
Wednesday
Mostly cloudy, with a high near 70. North wind 8 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 53. Northeast wind around 8 mph.
Thursday
Mostly cloudy, with a high near 72.
Thursday Night
A 50 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 59.
Friday
Showers and possibly a thunderstorm. High near 73. Chance of precipitation is 80%.
Friday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 60.
Saturday
Partly sunny, with a high near 80.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Memorial Day
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 85.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Collinsville IL
 38.68°N 89.97°W (Elev. 502 ft)
Last Update:
2:11 am CDT May 19, 2026
Forecast Valid:
4am CDT May 19, 2026-6pm CDT May 25, 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