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

Sterling Rockfalls (KSQI)

Lat: 41.74°NLon: 89.67°WElev: 643ft.

Fog/Mist

38°F

3°C

Humidity	100%
Wind Speed	SE 6 mph
Barometer	30.01 in (1016.5 mb)
Dewpoint	38°F (3°C)
Visibility	4.00 mi
Wind Chill	33°F (1°C)
Last update	27 Dec 7:56 am CST

More Information:

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

Extended Forecast for

Lanark IL

Dense Fog Advisory December 27, 08:52am until December 27, 12:00pm

Click here for hazard details and duration

Dense Fog Advisory

Dense Fog Advisory December 27, 08:52am until December 27, 12:00pm
NOW until 12:00pm Sat
Dense Fog Advisory
Today
High: 46 °F
Dense Fog
Tonight
Low: 45 °F
Chance Rain
and Areas Fog
Sunday
High: 51 °F⇓
Rain
Sunday Night
Low: 13 °F
Chance
Rain/Snow and
Breezy then
Chance Snow
and Windy
Monday
High: 20 °F
Mostly Cloudy
and Breezy
Monday Night
Low: 8 °F
Partly Cloudy
Tuesday
High: 27 °F
Mostly Sunny
Tuesday Night
Low: 18 °F
Mostly Cloudy

Detailed Forecast

Today

Widespread dense fog, mainly before 11am. Otherwise, cloudy, with a high near 46. Southeast wind 5 to 10 mph.

Tonight

A 30 percent chance of rain, mainly after midnight. Areas of fog. Otherwise, mostly cloudy, with a steady temperature around 45. Southeast wind 5 to 10 mph.

Sunday

Rain. Temperature rising to near 51 by 11am, then falling to around 40 during the remainder of the day. Southwest wind 5 to 10 mph becoming northwest 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

Sunday Night

A chance of rain and snow before 9pm, then a chance of snow. Mostly cloudy, with a low around 13. Wind chill values as low as -5. Windy, with a west wind 20 to 30 mph, with gusts as high as 40 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

Monday

Mostly cloudy, with a high near 20. Breezy.

Monday Night

Partly cloudy, with a low around 8.

Tuesday

Mostly sunny, with a high near 27.

Tuesday Night

Mostly cloudy, with a low around 18.

Wednesday

Mostly cloudy, with a high near 29.

Wednesday Night

Mostly cloudy, with a low around 6.