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

Hazardous Weather Outlook

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

70°F

21°C

Humidity	88%
Wind Speed	S 9 mph
Barometer	29.86 in
Dewpoint	66°F (19°C)
Visibility	10.00 mi
Last update	16 May 5:50 pm CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

3 Miles WNW Alton IL

Tonight
Low: 66 °F
Chance
T-storms then
Mostly Cloudy
Sunday
High: 87 °F
Becoming
Sunny
Sunday Night
Low: 69 °F
Increasing
Clouds
Monday
High: 87 °F
Chance
Showers then
Showers
Likely
Monday Night
Low: 70 °F
Chance
Showers
Tuesday
High: 87 °F
Showers
Likely then
T-storms
Tuesday Night
Low: 59 °F
Showers
Likely
Wednesday
High: 70 °F
Slight Chance
T-storms
Wednesday Night
Low: 51 °F
Slight Chance
Showers

Detailed Forecast

Tonight

A 30 percent chance of showers and thunderstorms, mainly before 7pm. Mostly cloudy, with a low around 66. Southeast wind around 9 mph.

Sunday

Mostly cloudy through mid morning, then gradual clearing, with a high near 87. South wind 10 to 18 mph, with gusts as high as 28 mph.

Sunday Night

Increasing clouds, with a low around 69. South wind 14 to 17 mph, with gusts as high as 25 mph.

Monday

A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. South wind 15 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.

Monday Night

A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70. South wind around 16 mph, with gusts as high as 24 mph.

Tuesday

Showers and possibly a thunderstorm. High near 87. Chance of precipitation is 90%.

Tuesday Night

Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.

Wednesday

A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 70.

Wednesday Night

A 20 percent chance of showers. Mostly cloudy, with a low around 51.

Thursday

Partly sunny, with a high near 70.

Thursday Night

A 20 percent chance of showers. Mostly cloudy, with a low around 52.

Friday

Partly sunny, with a high near 74.

Friday Night

A 20 percent chance of showers. Mostly cloudy, with a low around 56.