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.

Thunderstorm Light Rain

64°F

18°C

Humidity	94%
Wind Speed	S 20 G 32 mph
Barometer	29.92 in
Dewpoint	63°F (17°C)
Visibility	8.00 mi
Last update	18 May 6:50 pm CDT

More Information:

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

Extended Forecast for

4 Miles W Dorsey IL

Flood Watch May 18, 07:20pm until May 19, 01:00pm

Click here for hazard details and duration

Flood Watch

Flood Watch May 18, 07:20pm until May 19, 01:00pm
NOW until 1:00pm Tue
Flood Watch
Tonight
Low: 65 °F
Chance
T-storms
Tuesday
High: 80 °F
Chance
T-storms
Tuesday Night
Low: 54 °F
T-storms
Likely
Wednesday
High: 68 °F
Mostly Cloudy
Wednesday Night
Low: 48 °F
Mostly Cloudy
Thursday
High: 71 °F
Partly Sunny
Thursday Night
Low: 54 °F
Mostly Cloudy
then Chance
Showers
Friday
High: 73 °F
Showers
Likely

Detailed Forecast

Tonight

A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 65. South wind 13 to 16 mph, with gusts as high as 25 mph.

Tuesday

A 50 percent chance of showers and thunderstorms. Cloudy, with a high near 80. South wind 11 to 15 mph becoming west in the afternoon. Winds could gust as high as 23 mph.

Tuesday Night

Showers and thunderstorms likely before 1am, then a chance of showers. Cloudy, with a low around 54. Northwest wind 8 to 10 mph. Chance of precipitation is 60%.

Wednesday

Mostly cloudy, with a high near 68. North wind 9 to 11 mph.

Wednesday Night

Mostly cloudy, with a low around 48. Northeast wind around 8 mph.

Thursday

Partly sunny, with a high near 71.

Thursday Night

A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 54.

Friday

Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 73. Chance of precipitation is 70%.

Friday Night

A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 58.

Saturday

A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 30%.

Saturday Night

A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 59.

Sunday

A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.

Sunday Night

A 30 percent chance of showers. Mostly cloudy, with a low around 62.

Memorial Day

A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.