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

Watertown (KRYV)

Lat: 43.17°NLon: 88.72°WElev: 814ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Oconomowoc WI

Extreme Cold Watch January 23, 12:00am until January 24, 12:00pm
Winter Weather Advisory until January 21, 06:00am
Click here for hazard details and duration
Extreme Cold Watch
Winter Weather Advisory
  •  
    Winter Weather Advisory until January 21, 06:00am

    NOW until 6:00am Wed

    Winter Weather Advisory

  • Tonight

    Low: 9 °F

    Snow

  • Wednesday

    Wednesday: A 50 percent chance of snow after 4pm.  Mostly cloudy, with a high near 23. Light and variable wind becoming southwest 10 to 15 mph in the morning.

    High: 23 °F

    Mostly Cloudy
    then Chance
    Snow

  • Wednesday Night

    Wednesday Night: Snow likely, mainly before 9pm.  Cloudy during the early evening, then gradual clearing, with a low around 6. Wind chill values between -10 and zero. West wind 10 to 15 mph, with gusts as high as 30 mph.  Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    Low: 6 °F

    Snow Likely
    then Mostly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 15. Wind chill values between -10 and zero. West wind around 10 mph.

    High: 15 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -15. Northwest wind around 10 mph.

    Low: -15 °F

    Partly Cloudy

  • Friday

    Friday: Sunny and cold, with a high near -6. Northwest wind 5 to 10 mph.

    High: -6 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around -16. Northwest wind around 5 mph.

    Low: -16 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny and cold, with a high near 1. Northwest wind around 5 mph becoming calm  in the afternoon.

    High: 1 °F

    Cold

Detailed Forecast

Tonight
Snow, mainly before 5am. Low around 9. South wind around 5 mph becoming calm. Chance of precipitation is 100%. Total nighttime snow accumulation of 1 to 2 inches possible.
Wednesday
A 50 percent chance of snow after 4pm. Mostly cloudy, with a high near 23. Light and variable wind becoming southwest 10 to 15 mph in the morning.
Wednesday Night
Snow likely, mainly before 9pm. Cloudy during the early evening, then gradual clearing, with a low around 6. Wind chill values between -10 and zero. West wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Thursday
Mostly sunny, with a high near 15. Wind chill values between -10 and zero. West wind around 10 mph.
Thursday Night
Partly cloudy, with a low around -15. Northwest wind around 10 mph.
Friday
Sunny and cold, with a high near -6. Northwest wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around -16. Northwest wind around 5 mph.
Saturday
Partly sunny and cold, with a high near 1. Northwest wind around 5 mph becoming calm in the afternoon.
Saturday Night
A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around -7.
Sunday
A 20 percent chance of snow. Partly sunny and cold, with a high near 9.
Sunday Night
A 20 percent chance of snow. Mostly cloudy, with a low around -5.
Monday
Mostly sunny, with a high near 12.
Monday Night
Partly cloudy, with a low around 1.
Tuesday
Mostly sunny, with a high near 20.
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ABOUT THIS FORECAST

 
Point Forecast:
Oconomowoc WI
 43.11°N 88.51°W (Elev. 860 ft)
9:06 pm CST Jan 20, 2026
9pm CST Jan 20, 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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