Heavy Lake Effect Snow Downwind of Lakes Erie and Ontario; Fire Weather Concerns in the Southern Plains and Southeast

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. There is increasing confidence in snow squalls causing bursts of snow & gusty winds on New Year's Eve. Elevated fire weather conditions will continue today over parts of the Southern Plains and across much of the Southeast U.S. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

A Few Clouds

12°F

-11°C

Humidity	77%
Wind Speed	W 13 G 20 mph
Barometer	30.18 in (1024.3 mb)
Dewpoint	6°F (-14°C)
Visibility	10.00 mi
Wind Chill	-3°F (-19°C)
Last update	30 Dec 8:51 am CST

More Information:

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

Extended Forecast for

McHenry IL

Today
High: 23 °F
Mostly Cloudy
then Snow
Likely
Tonight
Low: 22 °F⇑
Snow then
Mostly Cloudy
Wednesday
High: 30 °F
Blustery.
Mostly Cloudy
then Snow
Likely
Wednesday Night
Low: 6 °F
Slight Chance
Snow then
Mostly Clear
New Year's Day
High: 19 °F
Partly Sunny
Thursday Night
Low: 12 °F
Mostly Cloudy
Friday
High: 25 °F
Partly Sunny
Friday Night
Low: 12 °F
Partly Cloudy
Saturday
High: 26 °F
Partly Sunny

Detailed Forecast

Today

Snow likely, mainly after 3pm. Cloudy, with a high near 23. Wind chill values as low as -2. West southwest wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%. Total daytime snow accumulation of less than a half inch possible.

Tonight

Snow before 9pm. Temperature rising to around 25 by 9pm. West northwest wind around 10 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Wednesday

Snow likely after noon. Mostly cloudy, with a high near 30. Blustery, with a west northwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

Wednesday Night

A 20 percent chance of snow before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 6. Wind chill values as low as -5. North northwest wind 5 to 15 mph, with gusts as high as 30 mph.

New Year's Day

Partly sunny, with a high near 19. West wind around 5 mph, with gusts as high as 15 mph.

Thursday Night

Mostly cloudy, with a low around 12.

Friday

Partly sunny, with a high near 25.

Friday Night

Partly cloudy, with a low around 12.

Saturday

Partly sunny, with a high near 26.

Saturday Night

Mostly cloudy, with a low around 18.