Thunderstorms and Heavy Rains Across Portions of the Central and Eastern US; Heat Expands to Portions of the East

Widespread showers and thunderstorms, some severe, may produce heavy downpours and flash flooding across much of the eastern and central U.S. Dangerous heat will continue in the Pacific Northwest and expand across portions of the East. Deep tropical moisture and associated thunderstorms will bring heavy rainfall and localized flash flooding across portions of Florida into the central Gulf Coast. Read More >

Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fog/Mist

74°F

23°C

Humidity 100%
Wind Speed Calm
Barometer 29.95 in (1014.1 mb)
Dewpoint 74°F (23°C)
Visibility 3.00 mi
Last update 16 Jul 1:56 am CDT
Extended Forecast for

2 Miles W Nason IL

  • Overnight

    Overnight: Isolated showers and thunderstorms.  Areas of fog after 3am.  Otherwise, mostly cloudy, with a low around 73. Calm wind.  Chance of precipitation is 20%.

    Low: 73 °F

    Isolated
    T-storms and
    Areas Fog

  • Wednesday

    Wednesday: Isolated showers, then scattered showers and thunderstorms after 10am.  Areas of fog before 8am.  Otherwise, mostly sunny, with a high near 94. Southwest wind 3 to 8 mph.  Chance of precipitation is 30%.

    High: 94 °F

    Scattered
    T-storms and
    Areas Fog

  • Wednesday Night

    Wednesday Night: Isolated showers and thunderstorms before 1am.  Mostly clear, with a low around 76. South southwest wind 3 to 6 mph.  Chance of precipitation is 20%.

    Low: 76 °F

    Isolated
    T-storms

  • Thursday

    Thursday: Scattered showers and thunderstorms, mainly after 1pm.  Mostly sunny, with a high near 95. Heat index values as high as 107. West wind 3 to 7 mph.  Chance of precipitation is 50%.

    High: 95 °F

    Isolated
    T-storms then
    Scattered
    T-storms

  • Thursday Night

    Thursday Night: Scattered showers and thunderstorms.  Mostly cloudy, with a low around 72. North northwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 40%.

    Low: 72 °F

    Scattered
    T-storms

  • Friday

    Friday: Scattered showers and thunderstorms.  Mostly cloudy, with a high near 90. Calm wind becoming east around 5 mph.  Chance of precipitation is 50%.

    High: 90 °F

    Scattered
    T-storms

  • Friday Night

    Friday Night: Isolated showers and thunderstorms.  Mostly cloudy, with a low around 74. Calm wind.  Chance of precipitation is 20%.

    Low: 74 °F

    Isolated
    T-storms

  • Saturday

    Saturday: Scattered showers and thunderstorms.  Partly sunny, with a high near 91. Southwest wind 3 to 7 mph.

    High: 91 °F

    Scattered
    T-storms

  • Saturday Night

    Saturday Night: Isolated showers and thunderstorms.  Partly cloudy, with a low around 74. South southwest wind around 5 mph becoming calm  in the evening.

    Low: 74 °F

    Isolated
    T-storms

Detailed Forecast

Overnight
Isolated showers and thunderstorms. Areas of fog after 3am. Otherwise, mostly cloudy, with a low around 73. Calm wind. Chance of precipitation is 20%.
Wednesday
Isolated showers, then scattered showers and thunderstorms after 10am. Areas of fog before 8am. Otherwise, mostly sunny, with a high near 94. Southwest wind 3 to 8 mph. Chance of precipitation is 30%.
Wednesday Night
Isolated showers and thunderstorms before 1am. Mostly clear, with a low around 76. South southwest wind 3 to 6 mph. Chance of precipitation is 20%.
Thursday
Scattered showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 95. Heat index values as high as 107. West wind 3 to 7 mph. Chance of precipitation is 50%.
Thursday Night
Scattered showers and thunderstorms. Mostly cloudy, with a low around 72. North northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Friday
Scattered showers and thunderstorms. Mostly cloudy, with a high near 90. Calm wind becoming east around 5 mph. Chance of precipitation is 50%.
Friday Night
Isolated showers and thunderstorms. Mostly cloudy, with a low around 74. Calm wind. Chance of precipitation is 20%.
Saturday
Scattered showers and thunderstorms. Partly sunny, with a high near 91. Southwest wind 3 to 7 mph.
Saturday Night
Isolated showers and thunderstorms. Partly cloudy, with a low around 74. South southwest wind around 5 mph becoming calm in the evening.
Sunday
Scattered showers and thunderstorms. Partly sunny, with a high near 93. Southwest wind 3 to 6 mph.
Sunday Night
Scattered showers and thunderstorms. Partly cloudy, with a low around 76. South southwest wind 3 to 5 mph.
Monday
Scattered showers and thunderstorms. Mostly sunny, with a high near 94. South southwest wind 3 to 8 mph.
Monday Night
Isolated showers and thunderstorms. Mostly clear, with a low around 76. South wind 3 to 6 mph.
Tuesday
Sunny and hot, with a high near 97. South southwest wind 3 to 7 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles W Nason IL
 38.18°N 89.01°W
2:01 am CDT Jul 16, 2025
2am CDT Jul 16, 2025-6pm CDT Jul 22, 2025
 
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Additional Resources

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Hourly Weather Forecast

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