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Elev 700 ft, 41.76 °N, 88.55 °W

Big Rock, IL Severe Weather Alertstar_ratehome

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Current Station
Personal Weather Station
Location: Big Rock, IL
Elevation: 700ft
Nearby Weather Stations

Active Weather Alerts

River Flood Warning
Issued: 4:37 PM Apr. 20, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

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

* WHERE...Fox River from Red Gate Road in St. Charles downstream to
Millington, including the Montgomery gauge.

* WHEN...Until further notice.

* IMPACTS...At 13.5 feet, Low-lying parking lots at city hall and
Boy Scout Island are threatened in St. Charles. Fox River Trail is
threatened at St. Mary Park in St. Charles.

* ADDITIONAL DETAILS...
- At 10:00 AM CDT Monday the stage was 13.6 feet.
- Recent Activity...The river stage has been relatively steady
just above flood stage the last few days.
- Forecast...The river is expected to remain near flood stage
for the next several days.
- Flood stage is 13.5 feet.
- http://www.weather.gov/safety/flood

&&



River Flood Warning
Issued: 4:08 PM Apr. 20, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Moderate flooding is occurring and major flooding is
forecast.

* WHERE...Fox River from Johnsburg downstream to Red Gate Road in
St. Charles, including the Algonquin Lock & Dam tailwater gauge.

* WHEN...Until further notice.

* IMPACTS...At 12.0 feet, Structures threatened along River Street,
Johnson Street, and Maiden Lane in East Dundee. North Harrison
Street threatened near Riverside Park in Algonquin. Washington
Street threatened in Carpentersville. Water Street, Edwards
Avenue, and Elgin Avenue threatened in East Dundee. Bayview Road
threatened in Elgin. Low-lying areas of Festival Park are
threatened in Elgin.
At 12.5 feet, Residences threatened along Edwards Avenue in East
Dundee. Prairie Trail is threatened at the river in Algonquin.
Parking lots threatened in downtown Carpentersville. Low-lying
parking lots threatened at Judson College in Elgin.

* ADDITIONAL DETAILS...
- At 10:30 AM CDT Monday the stage was 11.7 feet.
- Recent Activity...The river stage has been climbing slowly
over the last several days.
- Forecast...The river is expected to crest near 12.2 feet on
Thursday.
- Flood stage is 9.5 feet.
- Flood History...This crest compares to a previous crest of
11.8 feet on 05/23/2020.
- http://www.weather.gov/safety/flood

&&



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