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

Severe Thunderstorms and Critical Fire Weather Wednesday

Scattered severe thunderstorms are possible across portions of the northern High Plains Wednesday afternoon and evening. Severe wind gusts are the primary hazard. Gusty winds and low relative humidity will contribute to critical fire weather conditions across parts of the northern Great Plains and Great Basin Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Mostly Cloudy

67°F

19°C

Humidity 53%
Wind Speed W 6 mph
Barometer 29.96 in (1014.5 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 13 May 3:56 am CDT
Extended Forecast for

2 Miles ESE Dahlgren IL

  • Today

    Today: Sunny, with a high near 74. Northwest wind 7 to 15 mph, with gusts as high as 21 mph.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 47. North northwest wind 5 to 9 mph becoming calm in the evening.

    Low: 47 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 74. Calm wind.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 54. Calm wind becoming south southeast 5 to 7 mph after midnight.

    Low: 54 °F

    Increasing
    Clouds

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 81. South wind 9 to 15 mph, with gusts as high as 22 mph.

    High: 81 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66. South wind around 8 mph.

    Low: 66 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. South southwest wind 7 to 10 mph.

    High: 87 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 67. South wind around 8 mph.

    Low: 67 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 90. South wind 9 to 16 mph, with gusts as high as 22 mph.

    High: 90 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 74. Northwest wind 7 to 15 mph, with gusts as high as 21 mph.
Tonight
Clear, with a low around 47. North northwest wind 5 to 9 mph becoming calm in the evening.
Thursday
Sunny, with a high near 74. Calm wind.
Thursday Night
Increasing clouds, with a low around 54. Calm wind becoming south southeast 5 to 7 mph after midnight.
Friday
A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 81. South wind 9 to 15 mph, with gusts as high as 22 mph.
Friday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66. South wind around 8 mph.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. South southwest wind 7 to 10 mph.
Saturday Night
A slight chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 67. South wind around 8 mph.
Sunday
Mostly sunny, with a high near 90. South wind 9 to 16 mph, with gusts as high as 22 mph.
Sunday Night
Mostly clear, with a low around 70. South wind 9 to 11 mph, with gusts as high as 21 mph.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. South wind 11 to 18 mph, with gusts as high as 24 mph.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. South wind 10 to 13 mph, with gusts as high as 22 mph.
Tuesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 85. South southwest wind 14 to 17 mph, with gusts as high as 24 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Dahlgren IL
 38.19°N 88.64°W
Last Update:
1:26 am CDT May 13, 2026
Forecast Valid:
4am CDT May 13, 2026-6pm CDT May 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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