Areas of Excessive Rainfall and Severe Thunderstorms; Fire Weather Concerns in the Northern Plains and Four Corners Region

Widespread showers and thunderstorms may bring areas of flash flooding across much of the Southern Plains into the Gulf Coast region and the upper Ohio River Valley into the Mid-Atlantic. A large Pacific storm will bring widespread rain, gusty winds, and mountain snow to California and the Great Basin. Fire weather concerns expected in the Northern Plains and the Four Corners region. Read More >

Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Overcast

71°F

22°C

Humidity 90%
Wind Speed NE 7 mph
Barometer 29.92 in (1013.2 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 26 May 7:56 pm CDT
Extended Forecast for

3 Miles SE Bonnie IL

  • Tonight

    Tonight: Showers and thunderstorms likely before 4am, then a chance of showers.  Mostly cloudy, with a low around 64. East northeast wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 60%.

    Low: 64 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 5pm.  Cloudy through mid morning, then gradual clearing, with a high near 81. Calm wind becoming west around 6 mph in the morning.  Chance of precipitation is 40%.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 10 percent chance of showers and thunderstorms before 7pm.  Increasing clouds, with a low around 63. Light and variable wind.

    Low: 63 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 84. Light northeast wind becoming east northeast 5 to 9 mph in the morning.

    High: 84 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 63. East northeast wind around 7 mph.

    Low: 63 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 79. East wind around 8 mph.

    High: 79 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers after 1am.  Mostly cloudy, with a low around 62. East northeast wind around 5 mph becoming calm  in the evening.

    Low: 62 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers, with thunderstorms also possible after 1pm.  Mostly sunny, with a high near 81. East northeast wind 3 to 8 mph.

    High: 81 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 61. East northeast wind 3 to 6 mph.

    Low: 61 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers and thunderstorms likely before 4am, then a chance of showers. Mostly cloudy, with a low around 64. East northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Wednesday
A chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 5pm. Cloudy through mid morning, then gradual clearing, with a high near 81. Calm wind becoming west around 6 mph in the morning. Chance of precipitation is 40%.
Wednesday Night
A 10 percent chance of showers and thunderstorms before 7pm. Increasing clouds, with a low around 63. Light and variable wind.
Thursday
Partly sunny, with a high near 84. Light northeast wind becoming east northeast 5 to 9 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 63. East northeast wind around 7 mph.
Friday
Partly sunny, with a high near 79. East wind around 8 mph.
Friday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 62. East northeast wind around 5 mph becoming calm in the evening.
Saturday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 81. East northeast wind 3 to 8 mph.
Saturday Night
Partly cloudy, with a low around 61. East northeast wind 3 to 6 mph.
Sunday
A slight chance of showers. Mostly sunny, with a high near 80. East northeast wind around 8 mph.
Sunday Night
Partly cloudy, with a low around 59. East northeast wind around 6 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 80. Northeast wind 5 to 9 mph.
Monday Night
Mostly clear, with a low around 58. Northeast wind 3 to 7 mph.
Tuesday
Sunny, with a high near 80. Northeast wind 6 to 11 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Bonnie IL
 38.18°N 88.87°W
5:46 pm CDT May 26, 2026
8pm CDT May 26, 2026-6pm CDT Jun 2, 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