Central U.S. Severe Storms and Heavy Rain; Western Fire Weather Threats

A strong system will produce a swath of impacts. Severe storms with large hail, damaging winds, and a couple of tornadoes will be possible in the south and central Plains. Heavy rain could cause flash flooding in the Mid Mississippi Valley. Mountain snow will develop in the Rockies. Critical fire weather threats are expected across northern California and the Southwest. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

En Español

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Overcast

50°F

10°C

Humidity	59%
Wind Speed	E 10 mph
Barometer	30.09 in (1018.8 mb)
Dewpoint	36°F (2°C)
Visibility	10.00 mi
Wind Chill	46°F (8°C)
Last update	8 May 5:53 am CDT

More Information:

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

Extended Forecast for

Herculaneum MO

Today

Showers
Likely
High: 61 °F
Tonight

Slight Chance
Showers then
Showers
Likely
Low: 54 °F
Sunday

Showers
High: 70 °F⇓
Sunday
Night

Chance
Showers then
Mostly Cloudy
Low: 42 °F
Monday

Partly Sunny
High: 64 °F
Monday
Night

Mostly Cloudy
Low: 42 °F
Tuesday

Mostly Sunny
High: 64 °F
Tuesday
Night

Mostly Cloudy
Low: 43 °F
Wednesday

Slight Chance
Showers
High: 65 °F

Detailed Forecast

Today

Showers likely, with thunderstorms also possible after 1pm. Cloudy, with a high near 61. Southeast wind 7 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

Tonight

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Cloudy, with a low around 54. Southeast wind 9 to 13 mph. Chance of precipitation is 60%.

Sunday

Showers and possibly a thunderstorm before 4pm, then a chance of showers. Temperature rising to near 70 by 10am, then falling to around 54 during the remainder of the day. South wind 9 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 90%.

Sunday Night

A 30 percent chance of showers before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 42. North wind 5 to 9 mph becoming light after midnight. Winds could gust as high as 20 mph.

Monday

Partly sunny, with a high near 64. Calm wind becoming northeast around 6 mph in the morning.

Monday Night

Mostly cloudy, with a low around 42.

Tuesday

Mostly sunny, with a high near 64.

Tuesday Night

Mostly cloudy, with a low around 43.

Wednesday

A 20 percent chance of showers. Partly sunny, with a high near 65.

Wednesday Night

A 20 percent chance of showers. Partly cloudy, with a low around 45.