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.

Partly Cloudy

66°F

19°C

Humidity	90%
Wind Speed	S 14 mph
Barometer	29.96 in
Dewpoint	63°F (17°C)
Visibility	10.00 mi
Last update	19 May 2:35 am CDT

More Information:

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

Extended Forecast for

2 Miles WNW Glen Carbon IL

Flood Watch May 19, 02:43am until May 19, 01:00pm

Click here for hazard details and duration

Flood Watch

Flood Watch May 19, 02:43am until May 19, 01:00pm
NOW until 1:00pm Tue
Flood Watch
Overnight
Low: 65 °F
Chance
Showers
Tuesday
High: 77 °F
Showers
Likely then
Chance
T-storms
Tuesday Night
Low: 57 °F
Chance
T-storms
Wednesday
High: 70 °F
Partly Sunny
Wednesday Night
Low: 52 °F
Mostly Cloudy
Thursday
High: 72 °F
Mostly Cloudy
Thursday Night
Low: 58 °F
Slight Chance
Showers then
Chance
Showers
Friday
High: 72 °F
Showers

Detailed Forecast

Overnight

A slight chance of showers, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 65. South wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

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 70%.

Tuesday Night

A chance of showers and thunderstorms before 4am, then a slight chance of showers. Cloudy, with a low around 57. North wind 8 to 10 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 52. 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 58.

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 59.