National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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.

Fog/Mist

59°F

15°C

Humidity 96%
Wind Speed Calm
Barometer 30.06 in (1017.6 mb)
Dewpoint 58°F (14°C)
Visibility 5.00 mi
Last update 24 Aug 1:53 am CDT
Extended Forecast for

Arnold MO

  • Overnight

    Overnight: Partly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 83. Calm wind.

    High: 83 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 64. Light east wind.

    Low: 64 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86. Calm wind becoming southeast around 5 mph.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 67. Light east wind.

    Low: 67 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, with thunderstorms also possible after 4pm. Mostly sunny, with a high near 89. Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 67.

    Low: 67 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Thursday Night

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

    Low: 64 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 57. Calm wind.
Monday
Mostly sunny, with a high near 83. Calm wind.
Monday Night
Partly cloudy, with a low around 64. Light east wind.
Tuesday
Mostly sunny, with a high near 86. Calm wind becoming southeast around 5 mph.
Tuesday Night
Partly cloudy, with a low around 67. Light east wind.
Wednesday
A slight chance of showers, with thunderstorms also possible after 4pm. Mostly sunny, with a high near 89. Chance of precipitation is 20%.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 67.
Thursday
Sunny, with a high near 88.
Thursday Night
Mostly clear, with a low around 64.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 66.
Saturday
Partly sunny, with a high near 90.
Saturday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 71.
Sunday
Mostly sunny, with a high near 93.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Arnold MO
 38.42°N 90.38°W (Elev. 495 ft)
Last Update:
1:26 am CDT Aug 24, 2026
Forecast Valid:
2am CDT Aug 24, 2026-6pm CDT Aug 30, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation