Showers and Storms in the East; Dangerously Hot and Dry in the West

A frontal boundary will bring scattered showers and storms to portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Intermountain West and expand into the Central U.S. by early next week. Elevated wildfire conditions will develop across portions of the Northern/Central Plains and air quality issues will persist in the Northwest. Read More >

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Light Rain

73°F

23°C

Humidity 91%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 6 Aug 2:15 am CDT
Extended Forecast for

Grantfork IL

Flood Watch until August 6, 10:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until August 6, 10:00am

    NOW until 10:00am Thu

    Flood Watch

  • Overnight

    Low: 70 °F

    T-storms
    Likely

  • Thursday

    Thursday: Showers and thunderstorms, mainly before noon.  High near 80. Light and variable wind becoming south around 6 mph in the morning.  Chance of precipitation is 90%.

    High: 80 °F

    T-storms then
    Scattered
    T-storms

  • Thursday Night

    Thursday Night: Scattered showers and thunderstorms, mainly after 10pm.  Mostly cloudy, with a low around 69. Light southeast wind.  Chance of precipitation is 50%.

    Low: 69 °F

    Scattered
    T-storms

  • Friday

    Friday: Isolated showers and thunderstorms before 10am, then isolated showers and thunderstorms after 2pm.  Partly sunny, with a high near 86. Calm wind becoming southwest around 6 mph in the morning.  Chance of precipitation is 20%.

    High: 86 °F

    Isolated
    T-storms

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly before 1am.  Partly cloudy, with a low around 70. Light southwest wind.

    Low: 70 °F

    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 1am.  Mostly clear, with a low around 71.

    Low: 71 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

Detailed Forecast

Overnight
Showers and thunderstorms likely, mainly after 5am. Mostly cloudy, with a low around 70. Light south wind. Chance of precipitation is 60%.
Thursday
Showers and thunderstorms, mainly before noon. High near 80. Light and variable wind becoming south around 6 mph in the morning. Chance of precipitation is 90%.
Thursday Night
Scattered showers and thunderstorms, mainly after 10pm. Mostly cloudy, with a low around 69. Light southeast wind. Chance of precipitation is 50%.
Friday
Isolated showers and thunderstorms before 10am, then isolated showers and thunderstorms after 2pm. Partly sunny, with a high near 86. Calm wind becoming southwest around 6 mph in the morning. Chance of precipitation is 20%.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 70. Light southwest wind.
Saturday
Sunny, with a high near 87.
Saturday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 71.
Sunday
Mostly sunny, with a high near 89.
Sunday Night
Mostly clear, with a low around 73.
Monday
Sunny, with a high near 91.
Monday Night
Mostly clear, with a low around 75.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Wednesday
Showers and thunderstorms likely. Partly sunny, with a high near 85. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
Grantfork IL
 38.83°N 89.68°W (Elev. 551 ft)
1:26 am CDT Aug 6, 2026
2am CDT Aug 6, 2026-6pm CDT Aug 12, 2026
 
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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