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.

Light Snow

25°F

-4°C

Humidity	86%
Wind Speed	SW 8 mph
Barometer	29.87 in
Dewpoint	21°F (-6°C)
Visibility	1.25 mi
Wind Chill	16°F (-9°C)
Last update	21 Jan 5:45 pm CST

More Information:

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

Extended Forecast for

Janesville WI

Extreme Cold Watch January 23, 01:00pm until January 24, 12:00pm

Winter Weather Advisory January 21, 06:05pm until January 21, 11:00pm

Extreme Cold Warning January 23, 12:00am until January 23, 01:00pm

Click here for hazard details and duration

Extreme Cold Watch

...

Extreme Cold Warning

Winter Weather Advisory January 21, 06:05pm until January 21, 11:00pm
NOW until 11:00pm Wed
Winter Weather Advisory
Tonight
Low: 10 °F
Snow and
Patchy
Blowing Snow
then Partly
Cloudy
Thursday
High: 18 °F
Partly Sunny
then Slight
Chance Snow
and Breezy
Thursday Night
Low: -16 °F
Mostly Clear
Friday
High: -7 °F
Cold
Friday Night
Low: -14 °F
Mostly Cloudy
Saturday
High: 3 °F
Partly Sunny
then Slight
Chance Snow
Saturday Night
Low: -3 °F
Chance Snow
Sunday
High: 11 °F
Chance Snow

Detailed Forecast

Tonight

Snow, mainly before 10pm. Patchy blowing snow between 9pm and 10pm. Low around 10. Wind chill values between zero and 10. West wind 5 to 10 mph increasing to 10 to 15 mph after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 1 to 2 inches possible.

Thursday

A chance of flurries between 9am and 2pm, then a slight chance of snow after 2pm. Partly sunny, with a high near 18. Wind chill values between -5 and 5. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

Thursday Night

Mostly clear, with a low around -16. Wind chill values between -25 and -35. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.

Friday

Sunny and cold, with a high near -7. Wind chill values between -25 and -35. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.

Friday Night

Mostly cloudy, with a low around -14. Northwest wind around 5 mph becoming calm in the evening.

Saturday

A 20 percent chance of snow after noon. Mostly cloudy and cold, with a high near 3. North wind around 5 mph.

Saturday Night

A 40 percent chance of snow. Mostly cloudy, with a low around -3. Calm wind becoming north around 5 mph after midnight.

Sunday

A 30 percent chance of snow. Mostly cloudy, with a high near 11. Northwest wind around 5 mph.