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 >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

N/A

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

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

5 Miles SSW Janesville 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
Overnight
Low: 13 °F
Heavy Snow
Wednesday
High: 24 °F
Slight Chance
Snow then
Snow Showers
Wednesday Night
Low: 6 °F
Snow Showers
and Patchy
Blowing Snow
Thursday
High: 18 °F
Mostly Sunny
then Slight
Chance Snow
Showers
Thursday Night
Low: -15 °F
Partly Cloudy
Friday
High: -6 °F
Cold
Friday Night
Low: -17 °F
Partly Cloudy
Saturday
High: 0 °F
Cold

Detailed Forecast

Overnight

Snow, mainly before 5am. The snow could be heavy at times. Low around 13. Calm wind becoming southeast around 5 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 2 to 4 inches possible.

Wednesday

A slight chance of snow before 8am, then snow showers after 4pm. High near 24. West wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Wednesday Night

Snow showers, mainly before 9pm. Patchy blowing snow before 3am. Low around 6. Wind chill values between -5 and 5. Breezy, with a west wind 10 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

Thursday

A 20 percent chance of snow showers after 3pm. Mostly sunny, with a high near 18. Wind chill values between -10 and zero. West wind 10 to 15 mph, with gusts as high as 25 mph.

Thursday Night

Partly cloudy, with a low around -15. Northwest wind around 15 mph, with gusts as high as 30 mph.

Friday

Sunny and cold, with a high near -6. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.

Friday Night

Partly cloudy, with a low around -17. Northwest wind 5 to 10 mph becoming light north after midnight.

Saturday

Partly sunny and cold, with a high near 0. Calm wind becoming north around 5 mph in the morning.

Saturday Night

A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around -8.

Sunday

A 20 percent chance of snow. Partly sunny and cold, with a high near 8.