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 Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Overcast
58°F
14°C
| Humidity | 78% |
| Wind Speed | N 6 mph |
| Barometer | 30.18 in |
| Dewpoint | 51°F (11°C) |
| Visibility | 10.00 mi |
| Last update | 20 May 3:55 am CDT |
Extended Forecast for
Glen Carbon IL
Overnight
Low: 56 °F
Chance
ShowersWednesday
High: 67 °F
Cloudy
Wednesday Night
Low: 52 °F
Mostly Cloudy
Thursday
High: 72 °F
Mostly Cloudy
Thursday Night
Low: 57 °F
Mostly Cloudy
then Chance
ShowersFriday
High: 72 °F
Showers
Friday Night
Low: 60 °F
Chance
T-storms then
Slight Chance
ShowersSaturday
High: 80 °F
Mostly Cloudy
then Chance
T-stormsSaturday Night
Low: 63 °F
Slight Chance
T-storms then
Chance
Showers
Detailed Forecast
Overnight
A 30 percent chance of showers. Cloudy, with a low around 56. North wind around 9 mph.
Wednesday
Cloudy, with a high near 67. North wind 8 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 52. Northeast wind 6 to 8 mph.
Thursday
Mostly cloudy, with a high near 72. East wind 8 to 10 mph.
Thursday Night
A 50 percent chance of showers after 1am. Mostly cloudy, with a low around 57. East wind around 10 mph.
Friday
Showers and possibly a thunderstorm. High near 72. Chance of precipitation is 80%.
Friday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.
Saturday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 63.
Sunday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Memorial Day
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 64.
Tuesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Additional Forecasts and Information
Basemap Options
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Glen Carbon IL
38.77°N 89.97°W (Elev. 548 ft)
38.77°N 89.97°W (Elev. 548 ft)
2:41 am CDT May 20, 2026
4am CDT May 20, 2026-6pm CDT May 26, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
