Notice of NWS' New Version of Forecast
A new version of Forecast is coming soon!
Click here to visit the new site for details.

Wintry, Windy, and Cold in the West and North; Warming in the East

A deepening trough along the west will bring much below normal temperatures, and the potential for snow to sea-level in the Pacific Northwest, and low elevation snows throughout California, including into the Grapevine. Travel will be hazardous across the west due to snow and strong winds. These winds will also increase fire weather threats in the central and southern Plains. Warming in the east. Read More >

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Freezing Fog

26°F

-3°C

Humidity 96%
Wind Speed Calm
Barometer 30.26 in (1025.1 mb)
Dewpoint 25°F (-4°C)
Visibility 0.50 mi
Last update 18 Feb 12:56 am CST
Extended Forecast for

3 Miles ESE Sesser IL

Dense Fog Advisory until February 18, 09:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until February 18, 09:00am

    NOW until
    9:00am Sun

    Dense Fog Advisory

  • Overnight

    Overnight: Areas of dense fog.  Otherwise, mostly clear, with a low around 29. Light south southwest wind.

    Areas Dense
    Fog

    Low: 29 °F

  • Sunday

    Sunday: Areas of dense fog before 9am.  Otherwise, mostly sunny, with a high near 54. South wind 5 to 13 mph, with gusts as high as 20 mph.

    Areas Dense
    Fog then
    Mostly Sunny

    High: 54 °F

  • Sunday
    Night

    Sunday Night: Showers likely after midnight.  Increasing clouds, with a temperature rising to around 57 by 5am. South wind 10 to 16 mph, with gusts as high as 29 mph.  Chance of precipitation is 70%.

    Mostly Cloudy
    then Showers
    Likely

    Low: 49 °F

  • Washington's
    Birthday

    Washington's Birthday: Showers likely, mainly before noon.  Cloudy, with a high near 69. Breezy, with a south wind 16 to 20 mph, with gusts as high as 33 mph.  Chance of precipitation is 60%.

    Showers
    Likely and
    Breezy

    High: 69 °F

  • Monday
    Night

    Monday Night: Showers likely, mainly after midnight.  Cloudy, with a low around 62. South wind around 16 mph, with gusts as high as 28 mph.  Chance of precipitation is 60%.

    Showers
    Likely

    Low: 62 °F

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm before 7am, then showers likely.  High near 70. Breezy, with a south wind 16 to 21 mph, with gusts as high as 31 mph.  Chance of precipitation is 80%.

    Showers and
    Breezy

    High: 70 °F

  • Tuesday
    Night

    Tuesday Night: Showers and possibly a thunderstorm.  Low around 37. South southwest wind 13 to 17 mph becoming north northwest after midnight. Winds could gust as high as 26 mph.  Chance of precipitation is 90%.

    Showers

    Low: 37 °F

  • Wednesday

    Wednesday: A chance of showers.  Cloudy, with a high near 41. North northwest wind 9 to 14 mph, with gusts as high as 20 mph.

    Chance
    Showers

    High: 41 °F

Detailed Forecast

Overnight
Areas of dense fog. Otherwise, mostly clear, with a low around 29. Light south southwest wind.
Sunday
Areas of dense fog before 9am. Otherwise, mostly sunny, with a high near 54. South wind 5 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Showers likely after midnight. Increasing clouds, with a temperature rising to around 57 by 5am. South wind 10 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 70%.
Washington's Birthday
Showers likely, mainly before noon. Cloudy, with a high near 69. Breezy, with a south wind 16 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 60%.
Monday Night
Showers likely, mainly after midnight. Cloudy, with a low around 62. South wind around 16 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Tuesday
Showers and possibly a thunderstorm before 7am, then showers likely. High near 70. Breezy, with a south wind 16 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 80%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 37. South southwest wind 13 to 17 mph becoming north northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 90%.
Wednesday
A chance of showers. Cloudy, with a high near 41. North northwest wind 9 to 14 mph, with gusts as high as 20 mph.
Wednesday Night
A chance of rain showers before 2am, then a chance of rain and snow showers between 2am and 3am, then a chance of snow showers after 3am. Mostly cloudy, with a low around 33. North wind around 9 mph.
Thursday
Mostly cloudy, with a high near 48. Northeast wind around 8 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 38. Northeast wind around 7 mph becoming east southeast after midnight.
Friday
Showers likely. Cloudy, with a high near 54. East southeast wind around 7 mph becoming south in the afternoon.
Friday Night
Showers. Cloudy, with a low around 44. Northeast wind 6 to 9 mph becoming southwest after midnight.
Saturday
A chance of showers. Mostly cloudy, with a high near 57. Southwest wind 9 to 11 mph.
Click Map For Forecast
Point Forecast:
3 Miles ESE Sesser IL
 38.07°N 89.01°W
12:44 am CST Feb 18, 2018
1am CST Feb 18, 2018-6pm CST Feb 24, 2018
 
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