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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

Pontiac Municipal Airport (KPNT)

Lat: 40.92°NLon: 88.62°WElev: 650ft.

Overcast

72°F

22°C

Humidity	100%
Wind Speed	S 5 mph
Barometer	30.08 in
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Last update	15 Aug 8:55 am CDT

More Information:

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

Extended Forecast for

Streator IL

Flood Watch August 15, 09:21am until August 15, 10:00am

Click here for hazard details and duration

...

Flood Watch August 15, 09:21am until August 15, 10:00am
NOW until 10:00am Sat
Flood Watch
Today
High: 83 °F
Showers then
Chance
Showers
Tonight
Low: 73 °F
Slight Chance
Showers then
Showers
Likely
Sunday
High: 84 °F
Showers
Likely then
Partly Sunny
Sunday Night
Low: 66 °F
Partly Cloudy
Monday
High: 82 °F
Sunny
Monday Night
Low: 63 °F
Mostly Clear
Tuesday
High: 83 °F
Mostly Sunny
Tuesday Night
Low: 69 °F
Mostly Cloudy
then Showers
Likely

Detailed Forecast

Today

Showers and possibly a thunderstorm before 1pm, then a slight chance of showers between 1pm and 2pm. High near 83. South southwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Tonight

A slight 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 73. South southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday

Showers and thunderstorms likely, mainly before 8am. Mostly cloudy, with a high near 84. West northwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday Night

Partly cloudy, with a low around 66. North northwest wind 5 to 10 mph.

Monday

Sunny, with a high near 82. North wind around 5 mph.

Monday Night

Mostly clear, with a low around 63.

Tuesday

Mostly sunny, with a high near 83.

Tuesday Night

Showers likely after 1am. Mostly cloudy, with a low around 69.

Wednesday

A chance of showers and thunderstorms. Partly sunny, with a high near 81.