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

Current conditions at

Pontiac Municipal Airport (KPNT)

Lat: 40.92°NLon: 88.62°WElev: 650ft.

Fair with Haze

78°F

26°C

Humidity	53%
Wind Speed	N 5 mph
Barometer	30.08 in
Dewpoint	60°F (16°C)
Visibility	5.00 mi
Heat Index	79°F (26°C)
Last update	20 Aug 12:15 pm CDT

More Information:

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

Extended Forecast for

2 Miles S Streator IL

This Afternoon
High: 80 °F
Sunny
Tonight
Low: 59 °F
Mostly Clear
Friday
High: 81 °F
Mostly Sunny
then Chance
T-storms
Friday Night
Low: 64 °F
Chance
T-storms
Saturday
High: 78 °F
Sunny
Saturday Night
Low: 60 °F
Clear
Sunday
High: 76 °F
Sunny
Sunday Night
Low: 57 °F
Partly Cloudy
Monday
High: 77 °F
Mostly Sunny

Detailed Forecast

This Afternoon

Sunny, with a high near 80. Northeast wind around 5 mph, with gusts as high as 10 mph.

Tonight

Mostly clear, with a low around 59. Calm wind.

Friday

A 40 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 81. Calm wind becoming west southwest around 5 mph in the afternoon. Winds could gust as high as 15 mph.

Friday Night

A 50 percent chance of showers and thunderstorms before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 64. Southwest wind around 5 mph becoming west northwest after midnight. Winds could gust as high as 10 mph.

Saturday

Sunny, with a high near 78. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

Saturday Night

Clear, with a low around 60.

Sunday

Sunny, with a high near 76.

Sunday Night

Partly cloudy, with a low around 57.

Monday

Mostly sunny, with a high near 77.

Monday Night

Partly cloudy, with a low around 60.