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Elev 191 ft, 41.37 °N, 88.85 °W

Ottawa, IL Severe Weather Alertstar_ratehome

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Current Station
Personal Weather Station
Location: Ottawa, IL
Elevation: 191ft
Nearby Weather Stations

Active Weather Alerts

Flood Warning
Issued: 6:59 AM Apr. 4, 2026 – National Weather Service
...FLOOD WARNING IN EFFECT UNTIL 10 AM CDT THIS MORNING...

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...Portions of Illinois, including the following counties,
Cook, Grundy, Kankakee, La Salle, Livingston and Will and
northwest Indiana, including the following county, Lake IN.

* WHEN...Until 1000 AM CDT Saturday.

* IMPACTS...Flooding of ditches, viaducts and other low lying areas.
Creeks and streams may rise out of their banks.

* ADDITIONAL DETAILS...
- At 157 AM CDT, Doppler radar indicated heavy rainfall of
between 1 and 2 inches, and locally in excess of 3 inches has
occurred due to thunderstorms since last evening. Flooding is
ongoing or expected to begin shortly in the warned area.
- This areal flood warning replaces flash flood warnings and
advisories previously in effect.
- Some locations that will experience flooding include...
Chicago, Hammond, Gary, Orland Park, Tinley Park, Calumet
City, Chicago Heights, Roseland, East Chicago, Lansing, Oak
Forest, Harvey, New Lenox, Highland, Blue Island, Munster,
Dolton, Park Forest, Homewood and Matteson.
- http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Warning means flooding is imminent or may already be
occurring. Persons along rivers, creeks, and other waterways should
take immediate precautions to protect life and property.

&&



Flood Watch
Issued: 4:57 AM Apr. 4, 2026 – National Weather Service
...FLOOD WATCH REMAINS IN EFFECT UNTIL 10 AM CDT /11 AM EDT/
SATURDAY...

* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.

* WHERE...Portions of northern and central Illinois and northwest
Indiana.

* WHEN...Until 10 AM CDT /11 AM EDT/ Saturday.

* IMPACTS...Roads and streets may be flooded. Area creeks and
streams are already elevated, increasing the risk of flooding due
to additional rainfall.

* ADDITIONAL DETAILS...
- Recent rounds of heavy rainfall have left soils saturated and
stream and creek levels elevated across the area. Additional
rounds of heavy rainfall overnight may lead to rapid run-off
and an increased threat of flash flooding.
- http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Watch for flash flooding means rapid-onset flooding is
possible, but not yet certain, based upon the latest forecasts.
Flash flooding is a dangerous situation. Persons with interests
along area rivers, creeks, and other waterways should monitor the
latest forecasts and be prepared to take action should flooding
develop.

&&

River Flood Warning
Issued: 3:12 AM Apr. 4, 2026 – National Weather Service
...FLOOD WARNING IN EFFECT UNTIL EARLY WEDNESDAY MORNING...

* WHAT...Minor flooding is forecast.

* WHERE...Illinois River from Heritage Harbor east of Ottawa
downstream to Starved Rock Lock and Dam, including the Ottawa
gauge.

* WHEN...Until early Wednesday morning.

* IMPACTS...At 466.5 feet, Low-lying sections of Fox River Park in
Ottawa are inundated including Hudson Street River Walk.  St.
Clair Street is threatened in Ottawa.

* ADDITIONAL DETAILS...
- At 9:30 PM CDT Friday the stage was 462.8 feet.
- Forecast...The river is expected to rise above flood stage
just after midnight tonight to a crest of 466.1 feet early
Sunday afternoon. It will then fall below flood stage late
Tuesday evening.
- Flood stage is 463.0 feet.
- http://www.weather.gov/safety/flood

&&



River Flood Warning
Issued: 3:09 AM Apr. 4, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Minor flooding is occurring and 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 further notice.

* ADDITIONAL DETAILS...
- At 9:45 PM CDT Friday the stage was 20.3 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 9:45 PM CDT Friday was 20.3 feet.
- Forecast...The river is expected to rise to a crest of 25.0
feet Sunday evening. It will then fall below flood stage
Friday, April 10.
- Flood stage is 20.0 feet.
- http://www.weather.gov/safety/flood

&&



River Flood Warning
Issued: 2:46 AM Apr. 4, 2026 – National Weather Service
...FLOOD WARNING NOW IN EFFECT UNTIL LATE MONDAY EVENING...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Fox River from Millington downstream to confluence with
the Illinois River, including the Dayton gauge.

* WHEN...Until late Monday evening.

* IMPACTS...At 13.0 feet, Residential structures threatened along
2062nd Road in Wedron. Water overflows low-lying banks in Dayton
and Ottawa.

* ADDITIONAL DETAILS...
- At 8:45 PM CDT Friday the stage was 12.2 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 8:45 PM CDT Friday was 12.4 feet.
- Forecast...The river is expected to rise to a crest of 13.2
feet Sunday morning. It will then fall below flood stage
Monday afternoon.
- Flood stage is 12.0 feet.
- http://www.weather.gov/safety/flood

&&



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