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August 11, 2026: Powerful Derecho Produces Widespread Wind Damage and Tornadoes Across Northern Illinois and Northwest Indiana

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

60°F

16°C

Humidity	93%
Wind Speed	N 3 mph
Barometer	29.97 in (1014.1 mb)
Dewpoint	58°F (14°C)
Visibility	10.00 mi
Last update	20 Aug 2:51 am CDT

More Information:

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

Extended Forecast for

Long Lake IL

Overnight
Low: 58 °F
Mostly Clear
Thursday
High: 79 °F
Sunny
Thursday Night
Low: 58 °F
Partly Cloudy
Friday
High: 80 °F
Chance
Showers then
Chance
T-storms
Friday Night
Low: 61 °F
Chance
T-storms
Saturday
High: 78 °F
Sunny then
Slight Chance
T-storms
Saturday Night
Low: 57 °F
Mostly Clear
Sunday
High: 75 °F
Sunny
Sunday Night
Low: 56 °F
Partly Cloudy

Detailed Forecast

Overnight

Mostly clear, with a low around 58. Calm wind.

Thursday

Sunny, with a high near 79. Calm wind becoming northeast around 5 mph.

Thursday Night

Partly cloudy, with a low around 58. Calm wind becoming south southwest around 5 mph after midnight.

Friday

A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 80. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

Friday Night

A 40 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 61. Southwest wind around 5 mph becoming west northwest after midnight. Winds could gust as high as 10 mph.

Saturday

A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 78.

Saturday Night

Mostly clear, with a low around 57.

Sunday

Sunny, with a high near 75.

Sunday Night

Partly cloudy, with a low around 56.

Monday

Mostly sunny, with a high near 77.

Monday Night

Partly cloudy, with a low around 58.