On July 7, 2015, NWS implemented changes to the icons depicted on all of its point-forecast pages. Changes include new icon images with increased clarity, 6-hour increments for rapidly changing weather and new color blocks to highlight forecast hazards.

A page depicting all of the new icon images can be accessed here: www.weather.gov/forecast-icons

Changes to the icons were based on analysis of 6,700 public comments collected in 2014. Also, many of these changes are based on the results of a research project led by the National Center for Atmospheric Research.

Users are encouraged to continue to provide comments regarding these changes via email at icons@noaa.gov. NWS will continue to analyze incoming feedback and refine the icons as necessary. Any substantial change to the icons will be facilitated through the NWS public comment/review process.

Hot Weather Over Much of the U.S.

Tuesday may be the first day of September, but it will feel more like July in much of the country. Highs in the low to mid 90s will be common from the central and southern Plains across the southeast and into the mid-Atlantic. Highs over 100 will be common in the desert southwest. The hot weather is expected to continue in many areas through the Labor Day weekend.
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Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

77°F

25°C

Humidity 85%
Wind Speed S 3 mph
Barometer 30.05 in (1016.9 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 31 Aug 10:53 pm CDT
Extended Forecast for

Herculaneum MO

  • Tonight

    Tonight: Patchy fog after 4am.  Otherwise, mostly clear, with a low around 69. Light south wind.

    Patchy Fog

    Low: 69 °F

  • Tuesday

    Tuesday: Patchy fog before 9am.  Otherwise, mostly sunny, with a high near 91. Calm wind becoming south around 6 mph in the morning.

    Patchy Fog
    then Mostly
    Sunny

    High: 91 °F

  • Tuesday
    Night

    Tuesday Night: Mostly clear, with a low around 69. Light south wind.

    Mostly Clear

    Low: 69 °F

  • Wednesday

    Wednesday: Mostly sunny, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.

    Mostly Sunny

    High: 92 °F

  • Wednesday
    Night

    Wednesday Night: Mostly clear, with a low around 69. Light southeast wind.

    Mostly Clear

    Low: 69 °F

  • Thursday

    Thursday: Mostly sunny, with a high near 92.

    Mostly Sunny

    High: 92 °F

  • Thursday
    Night

    Thursday Night: Partly cloudy, with a low around 69.

    Partly Cloudy

    Low: 69 °F

  • Friday

    Friday: Mostly sunny, with a high near 91.

    Mostly Sunny

    High: 91 °F

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 69.

    Mostly Clear

    Low: 69 °F

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 69. Light south wind.
Tuesday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 91. Calm wind becoming south around 6 mph in the morning.
Tuesday Night
Mostly clear, with a low around 69. Light south wind.
Wednesday
Mostly sunny, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 69. Light southeast wind.
Thursday
Mostly sunny, with a high near 92.
Thursday Night
Partly cloudy, with a low around 69.
Friday
Mostly sunny, with a high near 91.
Friday Night
Mostly clear, with a low around 69.
Saturday
Sunny, with a high near 91.
Saturday Night
Mostly clear, with a low around 69.
Sunday
Mostly sunny, with a high near 90.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Labor Day
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
  Click Map For Forecast
Point Forecast:
Herculaneum MO
 38.27°N 90.39°W (Elev. 456 ft)
10:55 pm CDT Aug 31, 2015
11pm CDT Aug 31, 2015-6pm CDT Sep 7, 2015
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Graph

National Digital Forecast Database