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August 11, 2026: Derecho produces widespread wind damage and tornadoes across northern Illinois and northwest Indiana

Hazardous Weather Conditions

Current conditions at

Chicago, Chicago Midway Airport (KMDW)

Lat: 41.78°NLon: 87.76°WElev: 617ft.

Mostly Cloudy

79°F

26°C

Humidity	72%
Wind Speed	E 8 mph
Barometer	30.08 in (1017.5 mb)
Dewpoint	69°F (21°C)
Visibility	10.00 mi
Heat Index	82°F (28°C)
Last update	14 Aug 2:53 pm CDT

More Information:

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

Extended Forecast for

Westchester IL

Flood Watch August 14, 10:00pm until August 15, 10:00am

Click here for hazard details and duration

Flood Watch

This Afternoon
High: 79 °F
Slight Chance
Showers
Tonight
Low: 71 °F
Chance
Showers then
Showers
Likely
Saturday
High: 85 °F
Showers then
Chance
Showers
Saturday Night
Low: 74 °F
Mostly Cloudy
then Chance
T-storms
Sunday
High: 85 °F
Chance
T-storms
Sunday Night
Low: 68 °F
Partly Cloudy
Monday
High: 81 °F
Mostly Sunny
Monday Night
Low: 65 °F
Mostly Clear
Tuesday
High: 82 °F
Mostly Sunny

Detailed Forecast

This Afternoon

A 20 percent chance of showers. Partly sunny, with a high near 79. East northeast wind around 10 mph.

Tonight

A chance of showers before midnight, then a chance of showers and thunderstorms between midnight and 4am, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 71. East northeast wind around 5 mph becoming southeast after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday

Showers and thunderstorms, mainly before 1pm. High near 85. Heat index values as high as 95. South southwest wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Saturday Night

A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 74. West southwest wind 5 to 10 mph.

Sunday

A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 85. West northwest wind around 10 mph, with gusts as high as 15 mph.

Sunday Night

Partly cloudy, with a low around 68.

Monday

Mostly sunny, with a high near 81.

Monday Night

Mostly clear, with a low around 65.

Tuesday

Mostly sunny, with a high near 82.

Tuesday Night

A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 68.

Wednesday

A chance of showers. Mostly cloudy, with a high near 80.