Severe Weather Possible from the Central Plains to the Northeast; Building Heat in the West; Fire Weather Concerns for the Southwest

Severe thunderstorms will be possible from the central Plains to the Mid-Atlantic and Northeast on Monday. Hazardous heat will linger across the southern U.S. and build across the West through mid-week. Hot and dry conditions will fuel fire weather concerns for Interior Alaska and the Four Corners region through Monday. Read More >

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Mostly Cloudy

75°F

24°C

Humidity 90%
Wind Speed W 7 mph
Barometer 29.77 in (1008.2 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 21 Jun 10:56 pm CDT
Extended Forecast for

2 Miles SW Opdyke IL

Flood Watch until June 22, 07:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until June 22, 07:00am

    NOW until 7:00am Mon

    Flood Watch

  • Tonight

    Low: 68 °F

    Heavy Rain

  • Monday

    Monday: A 10 percent chance of showers and thunderstorms before 7am.  Mostly cloudy, with a high near 78. North northwest wind 9 to 11 mph.

    High: 78 °F

    Slight Chance
    T-storms then
    Partly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 60. North wind 5 to 8 mph becoming calm  in the evening.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82. Light east northeast wind.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62. Calm wind.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 85. Calm wind.

    High: 85 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 67. Calm wind.  Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A slight chance of showers and thunderstorms.  Mostly sunny, with a high near 87. Light west southwest wind.

    High: 87 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 68. Southwest wind 7 to 9 mph. Chance of precipitation is 60%.
Monday
A 10 percent chance of showers and thunderstorms before 7am. Mostly cloudy, with a high near 78. North northwest wind 9 to 11 mph.
Monday Night
Mostly clear, with a low around 60. North wind 5 to 8 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 82. Light east northeast wind.
Tuesday Night
Mostly clear, with a low around 62. Calm wind.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Calm wind.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67. Calm wind. Chance of precipitation is 20%.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87. Light west southwest wind.
Thursday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 65. Calm wind.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Calm wind.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Light south southwest wind.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Light south southwest wind becoming southwest 5 to 9 mph in the morning.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. South wind around 7 mph.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. Breezy, with a south southwest wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 25 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Opdyke IL
 38.26°N 88.78°W
10:11 pm CDT Jun 21, 2026
11pm CDT Jun 21, 2026-6pm CDT Jun 28, 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