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.
Fair
68°F
20°C
| Humidity | 88% |
| Wind Speed | SW 10 mph |
| Barometer | 30.03 in |
| Dewpoint | 64°F (18°C) |
| Visibility | 10.00 mi |
| Last update | 19 May 8:50 am CDT |
Extended Forecast for
West Alton MO
Flood Watch May 19, 09:29am until May 19, 01:00pm
NOW until 1:00pm Tue
Flood Watch
Today
High: 77 °F
Chance
T-stormsTonight
Low: 55 °F
Chance
T-storms then
Chance
ShowersWednesday
High: 70 °F
Partly Sunny
Wednesday Night
Low: 50 °F
Mostly Cloudy
Thursday
High: 72 °F
Mostly Cloudy
Thursday Night
Low: 56 °F
Slight Chance
Showers then
Chance
ShowersFriday
High: 72 °F
Showers
Friday Night
Low: 57 °F
Slight Chance
T-storms
Detailed Forecast
Today
A 50 percent chance of showers and thunderstorms, mainly before 5pm. Mostly cloudy, with a high near 77. South wind 9 to 14 mph becoming west in the afternoon. Winds could gust as high as 22 mph.
Tonight
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Cloudy, with a low around 55. North wind 9 to 11 mph. Chance of precipitation is 40%.
Wednesday
Partly sunny, with a high near 70. North wind around 10 mph.
Wednesday Night
Mostly cloudy, with a low around 50. Northeast wind around 8 mph.
Thursday
Mostly cloudy, with a high near 72. East wind 7 to 10 mph.
Thursday Night
A 50 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 56.
Friday
Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. High near 72. Chance of precipitation is 80%.
Friday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 57.
Saturday
Partly sunny, with a high near 80.
Saturday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 59.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83.
Sunday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Memorial Day
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
West Alton MO
38.86°N 90.22°W (Elev. 427 ft)
38.86°N 90.22°W (Elev. 427 ft)
8:46 am CDT May 19, 2026
9am CDT May 19, 2026-6pm CDT May 25, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
