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. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

72°F

22°C

Humidity 61%
Wind Speed N 3 mph
Barometer 30.03 in (1016.6 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 23 Aug 7:54 pm CDT
Extended Forecast for

4 Miles S Portage Des Sioux MO

  • Tonight

    Tonight: Patchy dense fog after 3am. Otherwise, partly cloudy, with a low around 60. North wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Partly Cloudy
    then Patchy
    Dense Fog

  • Monday

    Monday: Areas of dense fog before 8am. Otherwise, sunny, with a high near 85. Light northeast wind.

    High: 85 °F

    Areas Dense
    Fog then
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 63. East wind around 5 mph becoming calm in the evening.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87. Southeast wind 3 to 7 mph.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 69. East wind around 6 mph becoming calm in the evening.

    Low: 69 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

  • 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 89.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy dense fog after 3am. Otherwise, partly cloudy, with a low around 60. North wind around 5 mph becoming calm in the evening.
Monday
Areas of dense fog before 8am. Otherwise, sunny, with a high near 85. Light northeast wind.
Monday Night
Mostly clear, with a low around 63. East wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 87. Southeast wind 3 to 7 mph.
Tuesday Night
Partly cloudy, with a low around 69. East wind around 6 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 91.
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 89.
Thursday Night
Mostly clear, with a low around 65.
Friday
Sunny, with a high near 88.
Friday Night
Partly cloudy, with a low around 67.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 89.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Sunday
A 20 percent chance of showers. Partly sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Portage Des Sioux MO
 38.87°N 90.33°W (Elev. 456 ft)
Last Update:
6:56 pm CDT Aug 23, 2026
Forecast Valid:
8pm CDT Aug 23, 2026-6pm CDT Aug 30, 2026
 
Forecast Discussion
 
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Additional Resources

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