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 from Tropical Storm Moke will begin to impact the Big Island today, risking life-threatening flooding and mudslides in windward and southeast areas. Severe thunderstorms are expected across the northern Rockies/Plains and northern Great Basin. Repeated storms and heavy rainfall may cause flash flooding from the Plains into the Lower MS Valley. Dangerous heat persists across the South. Read More >

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

79°F

26°C

Humidity 48%
Wind Speed N 12 mph
Barometer 30.06 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 23 Aug 2:45 pm CDT
Extended Forecast for

4 Miles N West Alton MO

  • Tonight

    Tonight: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 58. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 58 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 85. Light and variable wind.

    High: 85 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 62. East wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 87. Southeast wind 5 to 7 mph.

    High: 87 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 67. East wind around 5 mph becoming calm in the evening.

    Low: 67 °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 fog after 5am. Otherwise, partly cloudy, with a low around 58. Northwest wind 5 to 7 mph becoming calm in the evening.
Monday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 85. Light and variable wind.
Monday Night
Mostly clear, with a low around 62. East wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 87. Southeast wind 5 to 7 mph.
Tuesday Night
Partly cloudy, with a low around 67. East wind around 5 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 71.
Sunday
A 20 percent chance of showers. Partly sunny, with a high near 92.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N West Alton MO
 38.91°N 90.22°W (Elev. 407 ft)
Last Update:
1:26 pm CDT Aug 23, 2026
Forecast Valid:
3pm CDT Aug 23, 2026-6pm CDT Aug 30, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation