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 Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Thunderstorm Light Rain Fog/Mist

67°F

19°C

Humidity	93%
Wind Speed	N 6 mph
Barometer	29.98 in (1015.0 mb)
Dewpoint	65°F (18°C)
Visibility	3.00 mi
Last update	18 May 11:53 am CDT

More Information:

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

Extended Forecast for

Lemay MO

Flood Watch May 18, 12:15pm until May 18, 07:00pm

Click here for hazard details and duration

Flood Watch

Flood Watch May 18, 12:15pm until May 18, 07:00pm
NOW until 7:00pm Mon
Flood Watch
This Afternoon
High: 78 °F
T-storms
Tonight
Low: 67 °F
Showers
Likely then
Mostly Cloudy
Tuesday
High: 86 °F
Showers then
T-storms
Tuesday Night
Low: 57 °F
T-storms
Likely then
Showers
Wednesday
High: 70 °F
Slight Chance
Showers
Wednesday Night
Low: 52 °F
Mostly Cloudy
Thursday
High: 74 °F
Partly Sunny
Thursday Night
Low: 58 °F
Slight Chance
Showers then
Showers
Likely

Detailed Forecast

This Afternoon

Showers and possibly a thunderstorm. High near 78. Southwest wind around 14 mph, with gusts as high as 28 mph. Chance of precipitation is 90%.

Tonight

Showers and thunderstorms likely before 10pm, then a slight chance of showers after 5am. Mostly cloudy, with a low around 67. South wind 9 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

Tuesday

Showers and thunderstorms before 4pm, then showers and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. High near 86. West wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.

Tuesday Night

Showers and thunderstorms likely before 1am, then showers and possibly a thunderstorm between 1am and 4am, then showers after 4am. Low around 57. North wind 6 to 8 mph. Chance of precipitation is 80%.

Wednesday

A 20 percent chance of showers. Partly sunny, with a high near 70. North wind around 8 mph.

Wednesday Night

Mostly cloudy, with a low around 52.

Thursday

Partly sunny, with a high near 74.

Thursday Night

A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.

Friday

Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 76. Chance of precipitation is 70%.

Friday Night

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.

Saturday

A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.

Saturday Night

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

Sunday

A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.