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.

Overcast

23°F

-5°C

Humidity	74%
Wind Speed	W 15 mph
Barometer	29.87 in
Dewpoint	16°F (-9°C)
Visibility	10.00 mi
Wind Chill	10°F (-12°C)
Last update	21 Jan 1:45 pm CST

More Information:

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

Extended Forecast for

7 Miles WSW Fort Atkinson WI

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

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

This Afternoon
High: 24 °F
Chance Snow
Tonight
Low: 6 °F
Heavy Snow
and Breezy
then Partly
Cloudy
Thursday
High: 18 °F
Mostly Sunny
then Slight
Chance Snow
Thursday Night
Low: -16 °F
Partly Cloudy
Friday
High: -7 °F
Cold
Friday Night
Low: -16 °F
Partly Cloudy
Saturday
High: 2 °F
Partly Sunny
then Slight
Chance Snow
Saturday Night
Low: -5 °F
Chance Snow
Sunday
High: 11 °F
Chance Snow

Detailed Forecast

This Afternoon

A 50 percent chance of snow after 4pm. Mostly cloudy, with a high near 24. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

Tonight

Snow, mainly before 10pm. The snow could be heavy at times. Low around 6. Wind chill values between -5 and zero. Breezy, with a west wind 10 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

Thursday

A chance of flurries between 9am and 3pm, then a slight chance of snow after 3pm. Mostly sunny, with a high near 18. Wind chill values between -5 and 5. West wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

Thursday Night

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

Friday

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

Friday Night

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

Saturday

A 20 percent chance of snow after noon. Partly sunny and cold, with a high near 2. North wind around 5 mph.

Saturday Night

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

Sunday

A 30 percent chance of snow. Mostly cloudy, with a high near 11.