Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

Davenport Municipal Airport (KDVN)

Lat: 41.61°NLon: 90.59°WElev: 741ft.

Mostly Cloudy

30°F

-1°C

Humidity 61%
Wind Speed SW 18 G 24 mph
Barometer 29.95 in (1014.7 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 21 Jan 12:52 pm CST
Extended Forecast for

Port Byron IL

Extreme Cold Watch January 23, 12:00am until January 24, 12:00pm
Wind Advisory January 21, 05:00pm until January 22, 12:00am
Click here for hazard details and duration
Extreme Cold Watch
Wind Advisory
  • This Afternoon

    This Afternoon: A chance of flurries between 3pm and 4pm, then a chance of snow after 4pm.  Mostly sunny early, then becoming cloudy, with a high near 33. Southwest wind around 15 mph, with gusts as high as 35 mph.  Chance of precipitation is 30%.

    High: 33 °F

    Chance Snow

  • Tonight

    Tonight: A chance of snow before 9pm, then a chance of flurries between 9pm and 10pm.  Cloudy during the early evening, then gradual clearing, with a low around 12. Windy, with a northwest wind 20 to 30 mph decreasing to 10 to 20 mph after midnight. Winds could gust as high as 50 mph.  Chance of precipitation is 30%.

    Low: 12 °F

    Chance Snow
    and Windy
    then Mostly
    Clear

  • Thursday

    Thursday: A chance of flurries between 11am and noon, then a slight chance of snow after noon.  Increasing clouds, with a high near 26. Wind chill values as low as zero. Breezy, with a west wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.  Chance of precipitation is 20%.

    High: 26 °F

    Mostly Sunny
    then Slight
    Chance Snow
    and Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -11. Wind chill values as low as -30. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: -11 °F

    Partly Cloudy
    then Partly
    Cloudy and
    Blustery

  • Friday

    Friday: Mostly sunny and cold, with a high near -2.

    High: -2 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -7.

    Low: -7 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of snow after noon.  Mostly cloudy and cold, with a high near 5.

    High: 5 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday Night

    Saturday Night: A 40 percent chance of snow.  Mostly cloudy, with a low around 2.

    Low: 2 °F

    Chance Snow

  • Sunday

    Sunday: Mostly cloudy, with a high near 14.

    High: 14 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
A chance of flurries between 3pm and 4pm, then a chance of snow after 4pm. Mostly sunny early, then becoming cloudy, with a high near 33. Southwest wind around 15 mph, with gusts as high as 35 mph. Chance of precipitation is 30%.
Tonight
A chance of snow before 9pm, then a chance of flurries between 9pm and 10pm. Cloudy during the early evening, then gradual clearing, with a low around 12. Windy, with a northwest wind 20 to 30 mph decreasing to 10 to 20 mph after midnight. Winds could gust as high as 50 mph. Chance of precipitation is 30%.
Thursday
A chance of flurries between 11am and noon, then a slight chance of snow after noon. Increasing clouds, with a high near 26. Wind chill values as low as zero. Breezy, with a west wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around -11. Wind chill values as low as -30. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Friday
Mostly sunny and cold, with a high near -2.
Friday Night
Mostly cloudy, with a low around -7.
Saturday
A 30 percent chance of snow after noon. Mostly cloudy and cold, with a high near 5.
Saturday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 2.
Sunday
Mostly cloudy, with a high near 14.
Sunday Night
Mostly cloudy, with a low around -4.
Monday
Mostly sunny, with a high near 11.
Monday Night
Mostly clear, with a low around 3.
Tuesday
Mostly sunny, with a high near 24.
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ABOUT THIS FORECAST

 
Point Forecast:
Port Byron IL
 41.62°N 90.33°W (Elev. 627 ft)
1:16 pm CST Jan 21, 2026
1pm CST Jan 21, 2026-6pm CST Jan 27, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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