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

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 Chill46°F (8°C)
Last update 8 May 5:53 am CDT
Extended Forecast for

Herculaneum MO

  • Today

    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%.

    Showers
    Likely

    High: 61 °F

  • Tonight

    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%.

    Slight Chance
    Showers then
    Showers
    Likely

    Low: 54 °F

  • Sunday

    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%.

    Showers

    High: 70 °F

  • Sunday
    Night

    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.

    Chance
    Showers then
    Mostly Cloudy

    Low: 42 °F

  • Monday

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

    Partly Sunny

    High: 64 °F

  • Monday
    Night

    Monday Night: Mostly cloudy, with a low around 42.

    Mostly Cloudy

    Low: 42 °F

  • Tuesday

    Tuesday: Mostly sunny, with a high near 64.

    Mostly Sunny

    High: 64 °F

  • Tuesday
    Night

    Tuesday Night: Mostly cloudy, with a low around 43.

    Mostly Cloudy

    Low: 43 °F

  • Wednesday

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

    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.
Thursday
Mostly sunny, with a high near 68.
Thursday Night
Mostly clear, with a low around 48.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 74.
Click Map For Forecast
Point Forecast:
Herculaneum MO
 38.27°N 90.39°W (Elev. 456 ft)
5:57 am CDT May 8, 2021
6am CDT May 8, 2021-6pm CDT May 14, 2021
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database