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 Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

58°F

14°C

Humidity 95%
Wind Speed Calm
Barometer 30.07 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 24 Aug 2:15 am CDT
Extended Forecast for

Dorchester IL

  • Overnight

    Overnight: Mostly clear, with a low around 56. Calm wind.

    Low: 56 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 81. Light and variable wind.

    High: 81 °F

    Sunny

  • Monday Night

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

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 84. Southeast wind 3 to 6 mph.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 65. Light southeast wind.

    Low: 65 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 87. Chance of precipitation is 20%.

    High: 87 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly clear, with a low around 65. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 62.

    Low: 62 °F

    Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 56. Calm wind.
Monday
Sunny, with a high near 81. Light and variable wind.
Monday Night
Mostly clear, with a low around 60. Light east wind.
Tuesday
Sunny, with a high near 84. Southeast wind 3 to 6 mph.
Tuesday Night
Partly cloudy, with a low around 65. Light southeast wind.
Wednesday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 87. Chance of precipitation is 20%.
Wednesday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly clear, with a low around 65. Chance of precipitation is 30%.
Thursday
Sunny, with a high near 85.
Thursday Night
Clear, with a low around 62.
Friday
Sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 64.
Saturday
Mostly sunny, with a high near 87.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Sunday
Mostly sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Dorchester IL
 39.08°N 89.9°W (Elev. 659 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