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.

Fair

67°F

19°C

Humidity	91%
Wind Speed	SW 5 mph
Barometer	30.02 in (1016.2 mb)
Dewpoint	64°F (18°C)
Visibility	10.00 mi
Last update	19 May 7:53 am CDT

More Information:

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

Extended Forecast for

Arnold MO

Flood Watch May 19, 08:38am until May 19, 01:00pm

Click here for hazard details and duration

Flood Watch

Flood Watch May 19, 08:38am until May 19, 01:00pm
NOW until 1:00pm Tue
Flood Watch
Today
High: 77 °F
Showers then
Chance
T-storms
Tonight
Low: 56 °F
Chance
T-storms then
Chance
Showers
Wednesday
High: 70 °F
Slight Chance
T-storms then
Mostly Cloudy
Wednesday Night
Low: 52 °F
Mostly Cloudy
Thursday
High: 72 °F
Mostly Cloudy
Thursday Night
Low: 57 °F
Slight Chance
Showers then
Showers
Likely
Friday
High: 74 °F
Showers
Friday Night
Low: 58 °F
Slight Chance
T-storms

Detailed Forecast

Today

Showers before 10am, then showers likely and possibly a thunderstorm between 10am and 11am, then a chance of showers and thunderstorms after 11am. High near 77. Southwest wind 7 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

Tonight

A 40 percent chance of showers and thunderstorms. Cloudy, with a low around 56. North wind around 8 mph.

Wednesday

A 20 percent chance of showers and thunderstorms before 9am. Mostly cloudy, with a high near 70. North wind 6 to 8 mph.

Wednesday Night

Mostly cloudy, with a low around 52. Northeast wind around 5 mph.

Thursday

Mostly cloudy, with a high near 72. East wind 5 to 7 mph.

Thursday Night

A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.

Friday

Showers and possibly a thunderstorm. High near 74. Chance of precipitation is 80%.

Friday Night

A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 58.

Saturday

A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80.

Saturday Night

A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.

Sunday

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83.

Sunday Night

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.