Tracking Atmospheric River in the Northwest U.S. and Clipper with Winter Weather in the Northeast U.S.

A prolonged atmospheric river will continue to bring gusty winds, heavy rainfall which may lead to urban and river flooding with possible landslides, and heavy inter-mountain snow over the Pacific Northwest into the northern Rockies through Thursday. A clipper will cross the Great Lakes and Northeast U.S. into Thursday with areas of moderate to heavy snow and mixed wintry precipitation. Read More >

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Overcast

26°F

-3°C

Humidity 57%
Wind Speed NW 10 G 20 mph
Barometer 29.92 in (1014.6 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 10 Dec 9:51 pm CST
Extended Forecast for

Winthrop Harbor IL

  • Tonight

    Tonight: Isolated flurries before 3am.  Mostly cloudy, with a low around 16. West northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 16 °F

    Isolated
    Flurries

  • Thursday

    Thursday: Mostly sunny, with a high near 25. West wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 25 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of snow.  Cloudy, with a low around 21. West southwest wind around 5 mph becoming north after midnight.

    Low: 21 °F

    Chance Snow

  • Friday

    Friday: A slight chance of snow before noon, then a chance of snow showers after noon.  Mostly cloudy, with a high near 28. West wind 5 to 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 30%.

    High: 28 °F

    Chance Snow
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of snow showers before midnight.  Mostly cloudy, with a low around 7. West northwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 7 °F

    Chance Snow
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: A 40 percent chance of snow.  Mostly cloudy and cold, with a high near 10.

    High: 10 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow before midnight.  Mostly cloudy, with a low around 0.

    Low: 0 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 13.

    High: 13 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 5.

    Low: 5 °F

    Partly Cloudy

Detailed Forecast

Tonight
Isolated flurries before 3am. Mostly cloudy, with a low around 16. West northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 25. West wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday Night
A 40 percent chance of snow. Cloudy, with a low around 21. West southwest wind around 5 mph becoming north after midnight.
Friday
A slight chance of snow before noon, then a chance of snow showers after noon. Mostly cloudy, with a high near 28. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Friday Night
A 30 percent chance of snow showers before midnight. Mostly cloudy, with a low around 7. West northwest wind around 15 mph, with gusts as high as 25 mph.
Saturday
A 40 percent chance of snow. Mostly cloudy and cold, with a high near 10.
Saturday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 0.
Sunday
Mostly sunny, with a high near 13.
Sunday Night
Partly cloudy, with a low around 5.
Monday
Mostly sunny, with a high near 24.
Monday Night
Mostly cloudy, with a low around 19.
Tuesday
Partly sunny, with a high near 34.
Tuesday Night
Mostly cloudy, with a low around 30.
Wednesday
Mostly cloudy, with a high near 38.
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ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.81°W
9:46 pm CST Dec 10, 2025
10pm CST Dec 10, 2025-6pm CST Dec 17, 2025
 
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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