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Elev 489 ft, 41.35 °N, 88.86 °W

Ottawa, IL Severe Weather Alertstar_ratehome

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Personal Weather Station
Location: Ottawa, IL
Elevation: 489ft
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River Flood Warning
Issued: 3:02 AM Aug. 16, 2026 – National Weather Service
...FLOOD WARNING NOW IN EFFECT UNTIL WEDNESDAY EVENING...

* WHAT...Minor flooding is forecast.

* WHERE...Illinois River from Starved Rock Lock and Dam downstream to
confluence with Big Bureau Creek, including the La Salle gauge.

* WHEN...Until Wednesday evening.

* IMPACTS...At 22.0 feet, Lower parking lot at Starved Rock State
Park is inundated east of La Salle. High water levels begin to
impact shipping interests along the river.

* ADDITIONAL DETAILS...
- At 9:45 PM CDT Saturday the stage was 19.5 feet.
- Forecast...The river is expected to rise above flood stage late
tomorrow morning to a crest of 22.4 feet Monday evening. It will
then fall below flood stage early Wednesday afternoon.
- Flood stage is 20.0 feet.
- http://www.weather.gov/safety/flood

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