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

Excessive Rainfall and Tropical Storm in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce considerable, potentially life-threatening, flooding across the lower Mississippi River Valley and central Great Lakes region through tonight. Tropical Storm Arthur will move northeastward along the Texas coast today and then move inland over southwestern Louisiana by tonight. An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana. Read More >

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Thunderstorm Light Rain Fog/Mist

70°F

21°C

Humidity 97%
Wind Speed NW 8 mph
Barometer 29.43 in (996.1 mb)
Dewpoint 69°F (21°C)
Visibility 0.75 mi
Last update 17 Jun 6:54 pm CDT
Extended Forecast for

Argenta IL

Tornado Watch June 17, 07:01pm until June 17, 10:00pm
Click here for hazard details and duration
...
  •  
    Tornado Watch June 17, 07:01pm until June 17, 10:00pm

    NOW until 10:00pm Wed

    Tornado Watch

  • Tonight

    Low: 61 °F

    Severe
    Thunderstorms
    and Breezy
    then Mostly
    Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 74. West northwest wind 13 to 15 mph, with gusts as high as 22 mph.

    High: 74 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55. West northwest wind 5 to 9 mph becoming light northwest.

    Low: 55 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 78. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 60. West northwest wind 5 to 7 mph becoming light and variable.

    Low: 60 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 81. Southwest wind 5 to 9 mph.

    High: 81 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 1am. Partly cloudy, with a low around 62. Southwest wind 5 to 7 mph becoming east after midnight.

    Low: 62 °F

    Mostly Clear
    then Chance
    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 77. Chance of precipitation is 80%.

    High: 77 °F

    Heavy Rain

Detailed Forecast

Tonight
Showers and thunderstorms, mainly before 9pm. Some of the storms could be severe. Low around 61. Breezy, with a west wind 17 to 22 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Mostly sunny, with a high near 74. West northwest wind 13 to 15 mph, with gusts as high as 22 mph.
Thursday Night
Mostly clear, with a low around 55. West northwest wind 5 to 9 mph becoming light northwest.
Juneteenth
Sunny, with a high near 78. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Friday Night
Partly cloudy, with a low around 60. West northwest wind 5 to 7 mph becoming light and variable.
Saturday
Mostly sunny, with a high near 81. Southwest wind 5 to 9 mph.
Saturday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 62. Southwest wind 5 to 7 mph becoming east after midnight.
Sunday
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 77. Chance of precipitation is 80%.
Sunday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 70%.
Monday
Mostly sunny, with a high near 75.
Monday Night
Mostly clear, with a low around 56.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 58.
Wednesday
Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Argenta IL
 39.99°N 88.82°W (Elev. 676 ft)
Last Update:
6:46 pm CDT Jun 17, 2026
Forecast Valid:
7pm CDT Jun 17, 2026-6pm CDT Jun 24, 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