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Moke Impacts Hawaii; Severe Thunderstorms and Heavy Rainfall from the Great Basin to the Plains

Heavy rain and gusty winds from Tropical Storm Moke will impact the Big Island into Monday, risking life-threatening flooding and mudslides in windward and southeast areas. Severe thunderstorms are expected across the northern Rockies/Plains and northern Great Basin. Dangerous heat persists across the Southern Plains and Lower Mississippi Valley, building further into the Southwest by midweek. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

61°F

16°C

Humidity 93%
Wind Speed Calm
Barometer 30.05 in (1017.3 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 23 Aug 11:53 pm CDT
Extended Forecast for

2 Miles ENE Herculaneum MO

  • Overnight

    Overnight: Widespread dense fog, mainly after 5am. Otherwise, partly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Dense Fog

  • Monday

    Monday: Widespread dense fog, mainly before 7am. Otherwise, sunny, with a high near 84. Light and variable wind.

    High: 84 °F

    Dense Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86. Calm wind becoming east around 5 mph in the afternoon.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

Detailed Forecast

Overnight
Widespread dense fog, mainly after 5am. Otherwise, partly cloudy, with a low around 56. Calm wind.
Monday
Widespread dense fog, mainly before 7am. Otherwise, sunny, with a high near 84. Light and variable wind.
Monday Night
Mostly clear, with a low around 60. Calm wind.
Tuesday
Mostly sunny, with a high near 86. Calm wind becoming east around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 66. Calm wind.
Wednesday
Mostly sunny, with a high near 90.
Wednesday Night
Partly cloudy, with a low around 66.
Thursday
Sunny, with a high near 89.
Thursday Night
Mostly clear, with a low around 64.
Friday
Sunny, with a high near 88.
Friday Night
Partly cloudy, with a low around 65.
Saturday
Mostly sunny, with a high near 89.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Sunday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Herculaneum MO
 38.27°N 90.36°W (Elev. 377 ft)
Last Update:
9:46 pm CDT Aug 23, 2026
Forecast Valid:
12am CDT Aug 24, 2026-6pm CDT Aug 30, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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Chance of Precipitation