Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fog/Mist

39°F

4°C

Humidity	100%
Wind Speed	E 3 mph
Barometer	29.71 in
Dewpoint	39°F (4°C)
Visibility	0.75 mi
Last update	28 Dec 2:50 am CST

More Information:

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

Extended Forecast for

South Beloit IL

Wind Advisory December 28, 06:00pm until December 29, 03:00pm

Click here for hazard details and duration

Wind Advisory

Overnight
Low: 44 °F
Chance
Showers and
Areas Dense
Fog
Sunday
High: 49 °F
Showers and
Areas Fog
Sunday Night
Low: 17 °F
Windy.
Rain/Snow
Likely then
Snow Showers
Monday
High: 21 °F
Chance Snow
Showers and
Windy then
Partly Sunny
and Blustery
Monday Night
Low: 8 °F
Partly Cloudy
and Blustery
then Mostly
Clear
Tuesday
High: 25 °F
Partly Sunny
Tuesday Night
Low: 19 °F
Mostly Cloudy
Wednesday
High: 28 °F
Mostly Cloudy
Wednesday Night
Low: 9 °F
Chance Snow
then Mostly
Cloudy

Detailed Forecast

Overnight

A 50 percent chance of showers. Areas of dense fog. Otherwise, cloudy, with a steady temperature around 44. East southeast wind around 5 mph.

Sunday

Showers, mainly before 5pm. Areas of fog before noon. High near 49. East southeast wind 5 to 10 mph becoming west northwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Sunday Night

A chance of rain showers before 7pm, then snow showers. Low around 17. Wind chill values as low as -2. Windy, with a west wind 20 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

Monday

A 50 percent chance of snow showers before noon. Mostly cloudy, with a high near 21. Wind chill values as low as -1. Windy, with a northwest wind 20 to 30 mph, with gusts as high as 45 mph.

Monday Night

Partly cloudy, with a low around 8. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 25 mph.

Tuesday

Partly sunny, with a high near 25.

Tuesday Night

Mostly cloudy, with a low around 19.

Wednesday

Mostly cloudy, with a high near 28.

Wednesday Night

A chance of snow before midnight. Mostly cloudy, with a low around 9.

New Year's Day

Mostly sunny, with a high near 18.